Isotope - Mars

Author's Note. When I published "Isotope" last year, I always meant to complete the story. It's finally done, and this is the second of three parts, with the last part being already finished and submitted at the same time. As the story poured out, it became more Sci-fi than straight Erotica. Still, there's a good amount of boot-knocking to be had. I hope you enjoy it, and please take time to rate and leave me a comment... I read each and every one. The story is all fictional, not based on anybody real, and with the exception of five unnamed children who don't appear in the story, everyone on Mars is over the age of 18.

In 2160, a meteor threatened Earth. 'Isotope' tells the story of the people who stayed on Earth to face the aftermath. Some lucky few were able to escape the planet before the Impact, to try to build a new life on Mars.

This is their story.

*****

Commander Devon Jacobs, recently named to lead the Mars Humanity Initiative, found himself in a tough spot. Leaving Earth because of the imminent meteor strike wasn't just a professional decision--it was a personal one that tore his family apart. He believed that life on Earth was about to be made extinct, and he wanted his family to be saved. Mars was the only option.

His wife, Barbara, was scared out of her mind about going into space. She just couldn't wrap her head around the idea that all life on Earth was about to end, no matter how many times Devon showed her the scientific evidence. She faced a heartbreaking choice. She loved her family, but the thought of space travel abjectly terrified her. The vastness of space was an immeasurable void that she simply could not bear to face. So, she held onto a sliver of hope that Earth might somehow survive. Watching her husband prepare for this dangerous journey to Mars was unbearable. In the end, Barbara decided she couldn't go. She chose to stay behind on Earth, clinging to the hope that some miracle would save the world she knew.

Their daughter Vanessa, on the other hand, had no doubts. She trusted her father completely and was ready to follow him anywhere, even to the ends of the universe. The bond between father and daughter was strong, built on years of shared dreams and values. Vanessa knew that she would miss her mom, but leaving her father's side never even crossed her mind.

One month before the meteor was due to strike, the Mars Humanity Initiative lifted off for the 11-month journey, taking thousands of humans away from Earth, heading to a different life on Mars. On Earth, Believers took shelter in bunkers, anticipating global disaster, while Non-Believers continued with their daily routines. Ultimately, everyone not safely inside a bunker died and was dissolved into dust. Many more inside bunkers died as well. Earth was left with less than 6000 inhabitants.

*****

Three weeks before everyone else was due to be awakened, Jacobs programmed his ship's system to awaken him. He wanted the additional time to run last-minute checks and make sure nothing went wrong on their crucial final approach to the Mars surface. Since she shared the bunker with her father, the system inadvertently woke Vanessa as well. She worked with her father on the final flight landing preparations. While her being awakened was not the plan, her presence was a great support to Devon. Her expertise and attention to detail proved beneficial to Devon and the mission. The hours seemed to melt away as they worked.

Together, they meticulously reviewed every system and protocol. Vanessa spent the previous year learning and training alongside her father and proved invaluable during this critical phase. They were hurtling through space and the only two souls awake... it was if they were the only people in the universe. Their bond strengthened with each passing moment, as they navigated the complexities of ensuring a smooth and safe landing for what was left of Humanity.

Some of the spaces they had to work in were tight, and they often found themselves in close proximity to each other. At night when they retired to their bunker, they shared a simple meal of Ramen or dried beef, and they talked late into the evening.

On the third night, they finished their simple dinner and were getting ready for bed, Vanessa said nervously, "This is really nice, Dad with just the two of us. But out here in space, sleeping alone seems lonely to the point of being, well, unnerving. I can't explain it," she said. "Would... would you mind if I slept in here with you? Being alone in there is just too... weird!"

He was quiet for a moment before answering, "Of course, honey. That would be really nice."

"I'll be right back," she said, going into the bathroom to change. She came out into the bedroom wearing one of his tee shirts and panties.

"You look comfy," said Devon as he pulled back the blankets and got into bed. The nights on Mars were going to be cold. It was easier to heat a blanket than a room, and all the beds came with thick electric blankets. Some of the settlers would eventually remark that one of the best things about life on Mars were the incredibly cozy beds.

Vanessa smiled and joined her father in the bed. She immediately wrapped her arms around him and molded her body against him. She lay there for a moment in his arms, sighing contentedly.

The way she was wrapped around him felt delightful, but he thought he should say something or move away a little. This felt too good to be right. Actually, it felt too right to be right. Either way, he did neither.

"Dad?" she asked after a few minutes.

"Mmhmm?"

"I guess you really miss mom, don't you?"

"Since we woke up, we've been so busy that I really haven't had any time to think about that. I'm sorry... I know that makes me an awful husband."

He could feel her shrug. "Not really," she said. "I mean, maybe in normal times, but these aren't normal times. The world ended, and we're just trying to hang on. Nothing's the same."

They lay there, face to face, searching each other's eyes in the dim light. After a few seconds, Devon responded, "No, nothing is the same. We're going to have to redefine what it means to be 'normal,' you know? I mean, is it normal for me to be lying in bed with you like this?"

She adjusted a bit and parted her legs, taking one of his legs between hers. Now they were lying even closer together.

She gazed into his face, hers full of love and desire as she summoned her courage.

She said, so softly that he almost didn't hear her, "I'd like it to be."

"Nessa...?"

"Dad, laying here with you... being alone with you this past week, is beyond my craziest dreams. This isn't new. I've felt this way about you since college, but I never thought it would happen. I mean, it's so, you know, forbidden."

"Vanessa, I know we've always been close," he said. "Your mom thought we might be too close, but..."

"She said that?"

"Yeah. A couple of times. But still, I like the way we are. So I just don't want to ruin it. I..." he seemed to be struggling with himself.

She took a chance a kissed him softly. He kissed her back, gently... tentatively. They were both taking it slowly. "We're not going to ruin anything."

She continued, "Back in school, I knew a couple of friends who felt the same way about their dads, too. People want to act like this doesn't happen, like it's so awful. It does, Dad. Girls fall for their fathers. Now it's our turn." She kissed him again, her tongue teasing his lips before she pulled back. Their legs were scissored. She pressed her thigh up between his legs and pressed against his cock, hard and warm. She could feel him press back against her.

"You know it's not just me," she said as she humped slowly against him, letting the feeling build. "Like I said, the world has ended. The old rules don't apply." She edged her mouth closer to him, her lips practically touching his. He felt her breath against his skin.

He moved and kissed her. Her tongue moved to his, and they shared their first lover's kiss. The kiss gained steam, and his hands explored her soft, nubile body, pulling the shirt off her leaving her topless. He delighted in the mewling sounds she made. He felt her reach down and take his shaft in her hand.

Devon pushed her onto her back and laid over her and poured every ounce of his passion into kissing her. His tongue invaded her mouth and she answered enthusiastically, tasting him, wanting to own all of him. She still held his rod, squeezing it and running her soft grip up and down, jacking him lovingly, wanting to give him more pleasure than he'd ever known. She felt his hips moving back and forth against her, his shaft as hard as stone. This was all for him... she wanted this to be incredible for him. She loved him and she wanted to erase any doubt that they should be together.

He started a downward journey, licking her, tasting her, devouring her. She felt his mouth on her nipples, sucking them, pulling them, his teeth teasing them gently, biting them to just the point before pain. Her perky little A-cups had never had so much attention paid to them, and even she hadn't known how sensitive they were, how with the right stimulus they seemed to be wired directly to her pussy.

Devon spent long minutes nibbling and licking them, sucking her nipples as if he were trying to bring about her milk.

He resumed his sojourn, down to her flat tummy where he licked her little innie causing her to shriek in laughter at that ticklish little spot. Heading further down, he tugged at the waist of her panties with his teeth. She immediately pulled them down and off. He pushed her thighs apart and Vanessa, naked and anxious for all of this, eagerly guided his face to her hungrily waiting snatch.

He nuzzled into her soft hair, deeply inhaling her scent, allowing himself to be bathed in her. His tongue reached out and licked her for the first time. She tasted incredible, like a heady mix of strawberries and oranges. He licked her right between her soft, furry lips, lapping up her syrup faster than she could pour.

She'd never experienced anything like this, and her mind was reeling at the thought that her own father had his mouth on her pussy... her daddy was eating her out!! She moaned deeply and pressed his head harder against her sex, writhing and grinding against his face.

With his fingers, he spread her labia open and wriggled his tongue as deeply as he could get inside her, licking and sucking right at her opening, his greedy mouth seeking and demanding her essence. Vanessa could feel the pressure building... this would not take long, she knew.

As his tongue assaulted her womanhood, he felt her cherry. He slipped a finger just inside her and sure enough, there it was!

Surprised, he asked, "Nessa? Baby? You're still...?"

"Yes Daddy," she managed to breathe despite the explosion building between her legs. "I'm a virgin. I saved it just for you."

"Mmmmm, baby girl," he moaned into her as he turned his attention from the sweet, hot channel pouring its honeyed goodness so freely into his mouth, to her tiny, shy little clit, just waiting to have its true purpose revealed. He led with his tongue, licking up from her tight, untouched little balloon knot, up between her lips, and took her clit between his lips, sucking it into his mouth as he flicked his tongue rapidly across her button. He slid a finger into her passage and massaged the roof.

The dual sensations of his lips and tongue devouring her clit while he worked her G-Spot so expertly, triggered the cataclysm between her trembling thighs. She cried out as the orgasmic paroxysm gripped her mercilessly, seizing her in its clutches as she soared through space literally and figuratively, unable to move, to think, to even breathe. After several long moments, her powerful orgasm began to release. Her strong young legs loosened their death grip from around her father's head. She lay there catching her breath, unable to speak.

Her friends had described their first times to her. None of them described their first times as being anything remotely like this. They were, to a one, quick and unsatisfying. She looked down at her father, his face still between her legs, on her pussy. He was now kissing her lightly with little pecks. The love she had for him soared. Her first time was amazing. And it wasn't even over. Hell, technically she was still a virgin.

Devon quickly came back up and started kissing her again, his face covered in her sweet tangy icing. She could taste herself on his lips and that fact delighted her. As their tongues danced again and he moaned into her mouth, he placed the tip of his thick cock against her entrance. Before entering her, he stopped.

"Do it," she said breathlessly. He simply gazed into her eyes. She returned his gaze, and the moment was forever seared into both their souls.

"Now," she breathed as she laid on her back and pulled him over on top of her, spreading her thighs wide. "Give it to me now... Take me... make me yours, Daddy," she urged as she pushed up against his cock, pressing it just inside her lips. Slowly he slid himself into her eagerly waiting pussy. She bit her lip, wincing in pain as his thick member tore her innocence away, squeezing her eyes shut against tears that leaked out.

Kissing her tears away, he continued sliding into her, slowly, giving her time to feel the intrusion and accept him into her body. They moaned together as the pain receded and they joined as one. His cock sliding slowly into her forbidden channel felt like heaven to her. Being with him was the realization of her long-time dream, and she vowed to herself that they would be together always... she would never let him go. Fully inside her now, they felt absolutely perfect together.

They began to move together slowly at first, then more surely and more intently. As they fucked together, their passions mounted quickly... they both knew this wouldn't last long. Vanessa tightened her strong legs around her father's back and writhed under him sensuously, coaxing the cum out of him and determined that every drop would be deposited safe and sound into her tight, gulping pussy.

Devon lost it first, screaming out loud as he fired volley after volley of his rich cream straight into his undulating daughter. She felt the first burst and joined him in orgasm, losing herself completely to the moment. As they simmered down, they resumed kissing, their tongues dancing gently together, tasting each other.

"Mmmmm..." purred Vanessa as she fell to sleep.

The next morning was two days before landing. The ships' systems woke the rest of the crews and passengers just in time for mankind's historic arrival on a new world.

Feeling guilty about having had sex with his own daughter, Devon tried to make her promise to try and find a suitable mate as Mars became settled. Vanessa wouldn't have any of it.

"Nope! I've wanted this for too long. And now it's happened, and it was better than I ever imagined. So no, I'm not sharing, and we're not stopping."

"Baby," he tried to protest.

"Look, Dad," she said as if addressing a slow student. "Who loves me more than you do? And who could possibly love you and care for you more than me?"

"Yeah but..."

"And lastly," she continued, "Who would we be hurting if we're together? That's right... nobody!"

"But I could be hurting you," he insisted.

"Dad, the only way you'll hurt me is if you reject me. "You wouldn't want to do that, would you?"

"No," he conceded. "It's just... it's just too good to be true."

"Nope, no downside. Yes, Dad, it is good, it is true, and I never want this to end."

"Like I said, I worry about hurting you. I love you more than anything and I don't want to cause you any pain," he said. "But if you're sure about this, I mean really sure, then I am in this with you for as long as you'll have me."

She smiled and kissed him. "So, I'll have you forever! Yes, I'm sure!" she said between kisses.

"Still," he added, "we have a big job to do. We can't get distracted by our new relationship. And you know we have to keep this secret from everyone, okay?"

"Even Uncle Emmett?"

"Yes, even Emmett. He's like a brother to me, but I'm not sure he'd understand. Let's keep this to ourselves, okay, Nessa?"

"I promise, Dad."

But those promises and declarations did nothing to cool the simmering sexual tension that always existed between them.

*****

22 Months later (just under one Martian year)

Prior to the Impact the bunkers used on Earth had proven to be ideal habitats for inhospitable environments. Mars transports contained hundreds of smaller versions of these bunkers. Upon landing, the ships deployed the bunkers autonomously, thereby transforming the empty hulls into industrial spaces, and the barren Martian landscape into a neighborhood. This began facilitating the gradual conversion of Mars into a habitable world.

Once deployed, the small bunkers served as individual residences. Each bunker was equipped with essential amenities and renewable energy sources, such as solar panels and fusion electricity to ensure self-sufficiency. The bunkers also featured personal hydroponic systems and food replicators, water reclamation units, and advanced air filtration systems, creating a comfortable and sustainable living environment.

Perhaps most importantly, each unit had a self-contained miniature factory that could quickly design and build virtually anything. These 'Table-Tops' as they were known had become staples of modern life on Earth prior to the Impact, and were built into every bunker on earth, and now on Mars.

The bunkers provided all the comforts of home. Each unit held two or three bedrooms, a sitting area, a full bathroom, and a full function kitchen. This innovative approach allowed every aspect of the transported infrastructure to be utilized efficiently.

Terra Martans decided on a 24-month year, and since Martian days were just slightly longer than on Earth, they kept the day at 24 hours and the month at 28 or 29 days. To keep the calendar lined up with the movement of the planet, ten months had 28 days and fourteen months had 29 days. The new Martian calendar, though an adjustment for some, soon became second nature to the settlers. The predictable rhythm it provided was a comforting constant amid the many changes they faced.

The Martian landscape, initially barren and hostile, began reflecting human ingenuity and resilience. They quickly built an underground complex with interconnected corridors. Each family unit or group living in the self-sustaining bunkers were connected to the Underground Complex, or UC, by a sophisticated network of subterranean tunnels. These tunnels facilitated transportation and served as conduits for power and communication lines, ensuring the colony's functionality and cohesion.

They developed insulated air-suits that refined the thin oxygen and provided insulation, allowing workers to work and travel on the surface as easily as on Earth. Battery-powered, solar-recharged Rovers provide individual transportation, and their designs and capabilities were steadily improving.

As settlers acclimated to their new environment, they established routines balancing work, socialization, and leisure. Agricultural domes emerged across the surface, cultivating crops genetically modified to thrive in Martian soil. Research facilities and laboratories became hubs of activity as scientists developed terraforming techniques aimed at making the atmosphere breathable and the land fertile.

Despite initial challenges, the sense of community among the settlers strengthened with each passing day. The inhabitants fostered a spirit of cooperation and determination, united by the common goal of transforming Mars into their new home. They named their new city Terra Marta.

*****

"Good morning, everyone," said Commander Jacobs bringing the meeting to order. "Let's get started. First things first. Is there enough to eat?"

Devon Jacobs was the Commander for the Mars Humanity Initiative. His position as leader had been determined before the first rocket blasted off. It was decided that the best chance for humanity's survival was with a pre-defined hierarchy in place. The last thing a new civilization on an unfamiliar planet needed was a leadership vacuum. Jacobs knew humanity had a long road ahead and approached his duties with an amiable yet no-nonsense, get-it-done approach.

Dr. Emma Kaiser, Hydroponics Chief, spoke up. "The existing crop fields are producing well and operating slightly above expectations. Current projections are unchanged, and we shouldn't see any capacity issues for about three to four years."

"What happens in four years?" asked Jacobs.

"Population increases," answered Dr. Kaiser. "Our population is young, healthy, and active, so the birth rate will likely greatly exceed the death rate. When the first babies start growing, the current capacity will begin to become inadequate. But we're working on expansion now. We'll be ready when the demand increases."

"That's good to hear," said Jacobs. "How are we coming with our terraforming efforts?"

"Drones have confirmed a large iron-like deposit just a few hundred klicks from here, near Hubris," answered Nate Bollinger, Terraforming Chief. "If that pans out, we should have raw materials to build more infrastructure and heavy machinery. We've expanded Table-Top capacity to industrial levels. Now, we just need the raw materials to get building. We're sending an expedition to investigate more thoroughly. We should have more conclusive information in a few weeks."

"If the deposit is there, how will we get to it?" asked Jacobs.

"Well sir, that's why we've put a halt on manufacturing any new equipment. If there's viable raw material there, we'll use what we have on hand to build new machinery and the use that heavy machinery to acquire more raw materials for projects going forward."

"Understood," said Jacobs. "Keep me posted."

During the Impact Crisis, the public was told that the Martian Relocation program would take nearly two million people to a dangerous new home on Mars. In fact, just over twelve thousand humans set foot on The Red Planet. The drastically lower numbers were because, even working together, the world simply could not build enough of the transport ships and living quarters before the meteor hit. So, they built as much as they could and took as many as they could physically fit inside the ships and left Earth behind.

Earth's billionaires naturally expected to be welcomed aboard. But the fifty-five-year-old age limit disqualified five thousand of the world's seven thousand billionaires. Of the other two thousand, fewer than one hundred of them had any usable skills other than making money. They possessed none of the practical skills or knowledge needed to actually build a new civilization from scratch. Things like trades, engineering, architecture, medicine, agriculture, construction, or even maintenance were needed on Mars. By and large they were a collection of rich moneychangers.

Undaunted, they threw their vast fortunes towards building their own ship with the intention of creating a luxurious utopia for the wealthy on the new planet. They were so sure of their own success, they made no secret of it, selling outrageously priced shares to whoever could afford it. Their transport carrying three thousand souls was lost in a meteor shower that formed above their landing site. There were no survivors, and only their wreckage landed on the surface.

The new citizens of Mars debated the name of the first Mars city, finally settling on Terra Marta, but they agreed unanimously that the proposed site of the 'Billionaire Club' would be called 'Hubris.'

Dr. Emmet Baker, Head of Medicine, spoke up. "Commander, regarding increased demand, we're tracking what might be a problem."

"Increased population? Too many babies being born?" he asked jokingly.

"No. Just the opposite. As you know, there were a handful of women who were expecting when the mission left Earth. Ordinarily, they would not have been allowed to make the trip, but since the planet was facing an Extinction-Level-Event, it was decided to take the risk and allow for transport. Well, those children were born with no issues. But..." He paused.

"Well?" prompted Jacobs.

"Well Devon, we've been on this planet for a whole Martian year, and no one else has given birth. In fact, no one has even gotten pregnant."

"No one?" asked Jacobs. "How's that possible?"

"Well, if you use the simplest answer available, I guess it's possible. But it's extremely improbable, given our population."

"What do you mean by that?"

"Well, if you look at our population, the oldest person on the planet is barely 50. And he's only here because of his extremely specific knowledge in a field that we will need; intelligent robotics. Android Development. Everybody else is under 45. Everybody who was selected to come was in perfect health; they're at the top of their game professionally. A lot of them are alpha types. And make no mistake... They're all..."

"Fucking like rabbits," offered Jacobs.

"That's correct," said the doctor. "That part is to be expected under any circumstances. But they haven't been told not to have children. In fact, they've been encouraged to have kids. After all, we have a planet to populate."

Commander Jacobs asked, "Is this going to be a problem?"

"Not for right now," answered Dr. Baker. "It's actually easier right now without having to deal with pregnancies, maternities, childcare, any of that. And twelve thousand healthy adults are enough to build a population. But if there's something that's keeping people from conceiving, eventually we will all die out. Meaning the human race will die out.

"This is serious."

"It is. That's why we're working on figuring it out right now. We want to be ahead of it. If it becomes a problem, we want to have contingencies in place."

"Understood. Keep me posted but try to keep this quiet," said Jacobs. "You know what?" he added. "Don't keep it quiet. Get the word out and tell people to step up their efforts. We'll just deal with the giggles as they come," he added with a barely contained grin.

He looked over to Anthony Glass, Chief Information Officer.

"How's our IT systems?"

Anthony was surprised to be called upon, as he rarely had news to offer, instead responding to requests for support. "Umm, well, that's really a question for the rest of the group. Any issues, anyone?"

The group collectively said that all was well as far as their data systems were concerned. Anthony's department did a lot of preventive work on the systems. His team of analysts and coders was top notch, selected from the best on Earth. His own daughter, Dana, was part of the team. He and his team were so efficient, they'd been accused of being lazy and useless... seemingly having nothing to do.

In retaliation for the poor perception his team was getting, he once gave his entire team two days off. Fully off. No phones or emails. Off. However, he told the complainers that they'd been given a whole week off. Twenty-four hours later found Devon Jacobs demanding Glass's people get back on the job. That was the last of the complaints.

Commander Jacobs chuckled at the memory of that incident. "Well, glad to hear everything is running smoothly, though I'm not surprised," he said. "Let's keep it that way. We can't afford any glitches, especially not now.

Dr. Karen Mitchell, head of the Environmental Sciences Division, reported on the current status of the habitat's air and water quality. "Levels are stable," she noted. "But we're continuing to monitor for any anomalies. The recent dust storms have posed a bit of a challenge, but our filtration systems are holding up well. Now that Terraforming has completed the Underground Complex, that's taking a lot of load off our surface systems."

"Good to hear, Dr. Mitchell," Jacobs acknowledged. "Keep me informed if anything changes."

As the meeting ended, he took a moment to address the team more broadly. "I want to thank each and every one of you for your dedication and hard work. Our mission here is unprecedented, and it's your tireless efforts that are making it a success. Let's continue to work together and support each other as we navigate the challenges ahead."

With those words, the meeting was adjourned.

Devon went over to his friend Dr. Baker. "So, nobody's pregnant?"

Emmet shook his head. "Not a one. And with twelve thousand healthy, attractive, young men and women being encouraged to screw as much as possible, it's a statistical impossibility."

"Atmospheric?"

"Probably. Likely. But every scan we've taken shows nothing unexpected, and there's nothing we can find that would cause infertility. But we're still looking."

Devon considered this for a moment. "Well, everyone doesn't want kids right away, so for some people this is a godsend." He thought about his own secret relationship he was having with his daughter, Vanessa. A pregnancy there would certainly cause some problems. They'd been sleeping together their entire time on Mars, but they thought they'd just been lucky... She hadn't had so much as a scare. "Keep on it," he said.

"Will do," agreed Emmett. "It's the weekend. Let's have a drink."

Devon Jacobs and Dr. Emmett Baker had been friends for decades now, having first met in Space Force OTS. When putting together the Command Team for the Mars mission, he knew he needed to surround himself with the best of the best, but he also needed at least one person he could trust implicitly. Emmett Baker fits both bills. Besides his own daughter, there was no one Devon trusted more. On Fridays after the staff meeting Devon took off his 'Leader of the Mars Humanity Initiative' hat and enjoyed a drink with his oldest friend.

*****

Chief Information Officer Anthony Glass, Tony, to all who knew him, pulled his Rover up to his bunker and entered the airlock.

"Anybody here?" he asked aloud. While he lived alone, his daughter would often drop by.

"Hey Dad," answered Dana Glass, his 23-year-old daughter. She looked upset and angry.

"Hey sweetheart!" said Tony. "What's wrong, honey?"

"Marc is out on that expedition to that iron deposit to see if it's viable," she answered. "We had this huge fight before he left."

Marcus Bingham was Dana's boyfriend of three years. They met before liftoff, and it seemed like love at first sight. Since their arrival on Mars, their relationship had been cooling steadily.

"I'm sorry, Dee. What happened? I mean, do you want to talk about it?" he asked, concerned.

"It's this whole 'we have a planet to populate' thing. I'm so sick of hearing that! Now Marcus is saying since I'm not pregnant yet, we should invite a third or fourth person. I'm not doing that!"

"Dang, sweetie, I had no idea. So, he's saying you're the problem and he wants to bring in other girls?"

"Pretty much, and he can kiss my Martian ass if he thinks -"

"Calm down... There's more to the story, Dana. It's not what you think either."

"What do you mean?"

"Well, everyone is trying for a child, right? We've all been told over and over, 'We have a planet to populate,' and everyone is encouraged to have kids, as in plural."

"Right," said Dana. "We've been trying, too. That's what I'm talking about. And so far, nothing's happened."

"Well," he started, "In our meeting today, we found out that for some reason, so far nobody is having any luck. In fact, there is not one pregnant woman on the whole planet."

Dana looked confused. "What do you mean, nobody?' We've been on the planet for over a Martian year. That's like two Earth years. These people are hooking up like crazy. Somebody must have gotten pregnant, right?"

Anthony shook his head. "According to Medicine, there were five women who were pregnant when we left Earth. Their kids were delivered just fine. Other than a handful of teenagers, those five are the only children on Mars."

"Damn," she exclaimed soberly. "I thought it was him, then he thought it was me. Turns out it might be..."

"Everybody," Anthony completed the thought.

"Damn," she repeated. "I kinda' wanted kids.

"Hey, this doesn't mean it can't happen," he said, rubbing her shoulder. "It's just that something's interfering with it for now," he added. "I'm sure they'll figure it out."

"Wow," said Dana. "I didn't expect that. But I'm still pretty pissed with Marcus, because he's trying to justify a harem, and I'm just not wired that way."

"Well, there's no point in going back home to sit there alone and angry. Why not stay here until you feel less murderous, okay? I'd certainly enjoy the company."

"Honestly," she said, "I was hoping you'd say that! It'll be like old times on Earth! Thank you, Daddy!" she said as she hugged him briefly and kissed him on the cheek.

"Yeah," he agreed, "except without the drama from your mama." He chuckled wryly. Anthony and his wife had finalized their divorce mere months before the mission left Earth for Mars. It had been a contentious divorce, initiated by his ex. He offered to secure a seat to Mars for her, but she was firmly in the ranks of the Non-Believers. Anthony, a man of science and technology, felt absolutely no sympathy for her, or any of the non-believers. His daughter, Dana, cut from the same cloth, agreed.

After dinner, Anthony had the bunker's computer system play music, and he and Dana sat together on the sofa and sipped a bottle of the wine he'd made sure made it into his bunker. He asked his daughter, "How do you feel about all that?"

"What, the whole 'we have a planet to populate' thing?"

"Yeah," said Tony. "I think it's bullshit. If we stay here long enough, populating the planet will take care of itself. And I really don't understand all these women agreeing to share a man. Harems," he scoffed. "I just don't get it."

She shrugged and said, "I'm not going to be part of any harem, but I'm not against trying to populate the planet. I mean, we do have a planet to fill. Besides, Dad, unlike Marcus, you are single. You still look pretty good. You probably could have a harem if you wanted. Isn't that what every guy wants?" she asked playfully.

"Not me," said Anthony shaking his head. "I've always been too much of a romantic. I like one good woman at a time, you know? Plus, I know I'm expected to, you know, contribute to the population effort, but I just don't see how it's gonna happen. I've already raised the world's best daughter. You're a tough act to follow." He smiled affectionately at her.

Dana was surprised at the tingles she felt at her dad's unexpected praise. And she felt a startling amount of pleasure just from hearing him say he didn't want to be with anyone. In her mind, she heard it as, 'Anyone else.' In response, she slid closer, up next to him and pulled his arm around her.

"That's so sweet, Dad," she said. "If I'm the world's best daughter like you say, then it's only because you've always been the world's greatest father. And now that there's this big push on for everyone to have a child..." she started and then went quiet.

"What?" he prompted gently.

She leaned against him again and softly finished, "You're such a great father. It would be a shame if you didn't get another chance to do it again. That kid would be so lucky."

With his other arm, he pulled her into a hug, squeezing her to him. She melted into his embrace. They sat there quietly together, just enjoying their closeness. On Earth, they had always been close, but it had never felt like this... just this side of proper. In the pleasant silence, they allowed their thoughts to wander. They both reached the same conclusion... something was happening.

Suddenly, he squeezed her shoulders one last time and got up. "It's late," he said, "and IT issues start early." He kissed her on the top of her head and walked away towards his bedroom before he let something happen. "Your room is still there," he said as he left.

Dana sat there relishing the tender emotions of the last few minutes, sitting there in her dad's arms. It was far from the first time they'd sat together like that, not talking, just enjoying each other's company. But it had never felt so... electric. Maybe she was just mad at Marcus. Maybe it was because her father said he'd never want any kind of harem like that... one girl would be his one and only. Maybe it was nothing...

******

Mars only has a thin atmosphere, so thin that it's incapable of supporting heavy winged flight. As a result, any type of flight had to be jet or rocket-powered, and since the MHI landed on the surface, the massive fusion-fueled rockets from the transport ships had been repurposed to provide stable power plants for the habitats and all their inhabitants. The sunlight was generally weaker than on earth, but solar panels had been steadily improving and were now over 90% efficient. The old solar panels they used on earth at the time of the Impact were only about 60% efficient. The additional efficiency gave the surface vehicles called Rovers, enough power to be able to operate by solar alone. Because roads were still a dream, Terra Martans found that the best vehicles for longer distances were hovercraft. But damn, they were noisy.

The two hovercraft roared a scant third of a meter above the Martian soil. One craft carried eight men, and the other carried two men and all their equipment. The thin atmosphere kept the dust at bay. Their positioning radar showed the metallic area was only an hour away. They'd been travelling for two days. Last night they camped out in a flat area and saw the most breathtaking starfield any of them have ever witnessed.

Nate Bollinger, head of Terraforming, sat shotgun and was excitedly monitoring the instrument display. From all indications, there would be enough iron ore to kick-start an industrial revolution. Fifty kilometers from where the instruments said the ore lay, they came upon a shallow gorge that was perfectly straight but got deeper as they rode alongside it. It was roughly one hundred or so meters across, almost surgically straight. They stopped to take some readings and found traces of iron, nickel, and silver, along with different metals that they could not identify. But this was not their ferric motherlode.

They continued along the gorge which ultimately went down to about ten meters. What could have made this huge cut in the Martian terrain?

Marcus Glass offered, "Could it have been done by someone?"

That idea was shot down by everyone. They'd been living on planet for the equivalent of two earth years, and there had never been any inkling of any other life on Mars.

"Looks like a scratch," said Tyson Cho. Cho was the youngest member of the terraforming team. He'd been chosen because of his extensive work in geology. He was like a walking database of knowledge pertaining to the surface of the Earth. His ideas about how to best tame the Martian landscape and force it to support human life were already bearing fruit.

"A fifty-kilometer scratch?" asked Nate.

The team had reached the iron ore deposit. The ore was exposed to the sky and was in the gorge at about ten meters. The gorge appeared to continue for several more kilometers beyond their position. The team brought two drones just in case they needed a bird's-eye view.

"Yeah," said Jason. "It looks huge to us, but on a planetary scale, it's like a flick of the finger." He fired up the drone and sent it straight up so they could take a better look. The gorge now looked like a huge scratch that started shallow, got progressively deeper, and then bounced off the iron ore deposit and took flight again.

Jason brought the drone back down and wrote some notes. The team waited for his input. Jason wasn't the boss... that was Nate's job. But Jason's expertise was deeply respected on the team, and they all, even Nate, trusted him to at least provide a well-thought-out starting point.

"I believe this is a meteor strike," he said. "It looks like a meteor approached the planet at just the right angle, so that rather than slam down and create a crater, this one glanced off the surface. It hit the ore, which was hard enough to make it sort of 'bounce' back up. It didn't lose much speed, and it traveled along until it left the thin Martian atmosphere and re-entered space. All at unimaginable speed. There's no way for us to know, but this could have been from the meteor that ultimately hit Earth."

"Wait," said Marcus. "You're saying it hit Mars at an angle, bounced off and went and destroyed Earth. Could that happen?"

Tyson snapped his gloved fingers, saying, "That's how much we know about the universe. Anything can happen."

Nate asked, "Is there any radiation?"

Tyson and two other crew members took some measurements. "None that we can tell, but we didn't bring deep-scan radiation equipment. We came looking for iron. And we damn sure found that."

"Thanks to the meteor," added Tyson. "The meteor exposed it and that's how we were able to find it. And what we've found is practically on the surface."

"What are the odds?" murmured Marcus.

"Astronomical," said Nate. "Pure, dumb, unadulterated luck."

They began to unload their equipment and start determining the future of the colony.

*****

Since she was staying with him, Anthony and Dana rode in together. Anthony didn't seem like there was anything amiss, but Dana was deep in thought. Her thoughts were so inappropriate that they were practically foreign. She kept telling herself how wrong it was to even consider it, but another mind kept saying, 'Yes, but...'.

She finally got to work, and her friend Sabrina Cho was there. Dana and Sabrina were working on a project to generate more water on the arid planet. Sabrina's hunky brother Tyson was helping with the project. Their work wasn't officially sanctioned, so the three of them tinkered with it in their off hours. The rest of the IT and Terraforming teams derided their efforts, calling it 'Sci-fi-Science', since the theory was based on a concept from a 200-year-old movie about battles in space. The three of them worked extremely well together. If Dana was going to fantasize about someone other than her own boyfriend, Tyson was arguably a better choice. But at least for right now, that's not what she wanted. Not at all.

Work passed quickly. The data systems were humming along at near-peak efficiency. All that was required was monitoring and an occasional tweak here or there. As their official day ended and everyone else filed out, Dana went over to Sabrina's station.

"Where's Tyson today?" asked Dana.

"Oh, he's out on that iron ore expedition," replied Sabrina. "They're supposed to be gone for two or three weeks."

"Really? Marcus is on that trip, too. He didn't say it would be that long. He just implied it would be a few days."

"He didn't tell you?" Sabrina asked, sounding surprised. "Tyson said it would be at least two weeks, and most likely three."

"Well, Marcus is pissed with me right now," Dana said, shrugging.

"Really? What did you do?" she asked, noticing that Dana didn't seem too broken up over earning her boyfriend's ire.

"Oh, you know, the egregious sin of not getting pregnant on demand. Remember," and Dana dropped her voice, so it was deep and official, "We have a planet to populate!"

Sabrina laughed and agreed, "I know! I am so sick of hearing that shit! I'm not gonna give it up to every jackass on the planet out of some twisted 'planetary duty'. I am nobody's broodmare. And I am damn sure not going to be part of some sick losers' sex dream harem! Fuck that! Plus, there are enough people here that population will grow naturally anyway."

"That's exactly what my dad said just yesterday. He thinks that whole thing is men trying to take advantage."

"Your dad, huh? Now he could probably have a harem!"

"He said he didn't like that idea either. He likes, in his words, 'one good woman at a time.'"

"One good woman, huh?" said Sabrina dreamily, a faraway look in her eyes. "I wonder what kind of woman your dad--"

"Bitch, no!" said Dana.

"What?" said Sabrina innocently. "He's single, right? And I'm sure his planetary population skills are up to snuff."

For Dana, the idea of her very attractive, sexy young friend successfully seducing her equally sexy father made her stomach lurch. And that strange conversation from the other night did not help. To deflect away from her true feelings, she countered, "What about you setting me up with Tyson? Marcus is acting like an idiot with all this 'harem' crap. It might be time to trade up."

Sabrina's jovial mood inexplicably dissipated like smoke in the rain. Tyson was her big brother as well as her best friend. They'd always been close, but she'd never been the least bit jealous of any of her brother's girlfriends. She'd often been friends with them.

But just now, hearing Dana suggest getting together with Tyson somehow sucked all the air out of her. She didn't understand it. She'd never thought of Tyson like that. He's her brother. Their entire lives, she and Tyson had just been a normal, ordinary brother and sister. They occasionally squabbled, even though they were very close. But ever since they arrived on Mars, Sabrina had become increasingly aware of his attractiveness, in a most inappropriate way. She couldn't explain why, but suddenly, she didn't want Dana or anyone else for that matter, getting their hands on him.

Dana noticed the sudden change in her friend's demeanor and took notice of the fact that it mirrored her own. She put her hand on her friend's arm and said, "Sabrina, what the hell! What's going on here?"

Sabrina looked at her friend, bewildered and said, "I don't know. I mean, I have no idea. Ever since we got to Mars, I've been feeling... I don't know, something about Ty. It's scary."

Dana leaned close to Sabrina and confided, "Yeah, and when you mentioned getting with my dad, I wanted to..." she paused as if searching for her words.

"To slap the shit out of me?" offered Sabrina.

"Yes?" winced Dana. They both giggled like schoolgirls.

"Believe me," said Sabrina. "I totally understand. Maybe we should just try and pretend this weird conversation never happened."

Dana looked at her friend skeptically and said, "I guess we can try..."

In the days that followed, Dana and Sabrina intentionally avoided the topic of their male relatives, focusing instead on their work and the challenges of the extracting water from the dry Martian air. Yet, an undercurrent of tension remained, simmering just beneath the surface of their camaraderie.

The day before the expedition was due to arrive back, Dana asked Sabrina, "Let me ask you something that's been on my mind, okay? It's kinda serious."

"What's up? You look like this is for real."

"It is. Look..." She hesitated for a bit as everyone else left the lab, leaving them alone. Her voice barely above a whisper, she asked, "If something were to happen between, well, between me and my dad... would you hate me?"

Sabrina looked shocked but said nothing.

Dana rambled on, "Because you're my best friend and I really like hanging with you and I don't want you to think I'm some kind of sick freak wanting to get with my own father, but I honestly don't think I'm--"

"Stop," said Sabrina softly. "I won't judge you if you don't judge me for dragging my brother's sexy ass to bed."

They looked at each other with a renewed sense of sisterhood and hugged tightly, laughing nervously.

"What's wrong with us?" asked Sabrina.

"Nothing. Nothing at all," answered Dana resolutely.

******

Jenna Bollinger walked into the bunker. This whole thing sucked ass! She was 22, and instead of being in college partying her ass off, she was on Mars. Fucking MARS! Her workaholic dad was never home. Hell even now, he was somewhere playing with rocks in the middle of nowhere. He said he would be gone for three weeks. That left her here with her boring-ass mother and nerdy-ass twin brother Chase. Jenna didn't hate her twin brother. They just had nothing in common and could not have been less alike.

Jenna was a hot blonde with a body built for good times and poor decisions. Back on earth, she was insanely popular and dominated all the best social media feeds. All the cool people knew her and sought her out. Now, one Martian year in, she was once again growing her following. Sure, they had a planet to populate, but Jenna Bollinger wasn't ready to be anybody's mommy.

Chase, on the other hand was a goody - goody, nerdy bookworm. He spent most of his time with the Advanced Learning System computer, learning Geology, trying to follow in their dad's footsteps. Jenna's hot friends all thought Chase was good looking enough to be fuckable, but the geek didn't seem to want any of them. He could likely snap his fingers and create a harem out of thin air, but he simply was not interested. She didn't think he'd been laid since arriving on Mars. Oh well... his loss!

Jenna was in the kitchen pouring herself a soft drink when Chase came in.

"'sup, Jenn," he greeted her. "Another party?"

"There's always time for a party," she replied, still focused on her drink. When she looked at him, her breath caught. "What did you do?" she asked him.

"What do you mean?"

"I don't know. You look different. Hair? No. Same awful clothes. I know what it is... You're working out, aren't you. You look kinda filled out."

Jenna couldn't put a finger on it, but suddenly Chase looked less like a walking spazz, and more like a guy. An attractive guy. A guy she'd actually give the time of day to. As they talked like they did every other day, she couldn't help but notice how nice his smooth baritone voice sounded. How he looked straight into her eyes when they talked, making her feel heard and seen unlike anyone else had ever done. What was he doing differently? She'd need to figure that out. But tonight, there were more parties. But while she was out with her hot, popular friends, her thoughts never strayed far from her twin's unexpected new attractiveness.

*****

Conditions at the site of the iron ore were better than expected, and the expedition ended early. Everyone was thrilled to see the men back early.

At the bunker shared by Sabrina and Tyson Cho, Sabrina was happily helping her brother with his filthy work clothes as well. She took them just outside to shake them off, herself becoming covered in Martian dust. But something was changing inside the 22-year-old Computer Coder. She came back inside. While filling the cleaner with the dusty items, Tyson suddenly looked indescribably attractive. She simply could no longer resist.

She went to him and tore the rest of his clothes from his lanky frame and pushed him, naked, to their shower. She turned on the jets and pushed him into the stall. She ripped off her own clothes and got in behind him. She filled her hands with liquid soap and began to lather up every part of her brother. As for Tyson, it never even crossed his mind that maybe, he shouldn't be naked in the shower, with his equally naked baby sister running her soapy hands all over him and his steel-hard cock. In fact, it felt as natural as sunshine. She gripped him tightly, sliding her slick hands up and down his length. He pulled her in close for their first kiss. His mouth took hers and she surrendered her tongue to him. They stood under the warm spray, kissing like lovers.

They washed each other lovingly. Tyson ran the sponge over every inch of Sabrina's petite, curvy body. Kneeling before her, he ran the soapy sponge over her feet, lifting her leg and washing her soles. He soaped up her legs and headed to her thighs. She stood with her feet apart as he used his hands to wash her soft pubes, slipping his fingers inside her as he washed her front and back. She faced the wall and spread her legs, pushing her ass back to him in clear invitation.

Tyson got her message and lovingly washed her whole back, covering her round butt in suds, and at last focusing on her tight bumhole, sliding his slick, soapy middle finger all the way in to the base. Sabrina groaned loudly in both pain and pleasure as her brother's thick finger plumbed in and out of her virgin asshole. She'd never been into ass play before, but she knew, with Tyson, she'd do anything and everything. She screamed as she surrendered to the orgasm he gave her, her sphincter muscle flexing and pulsing around his finger.

He pulled his finger out and she felt mournfully empty. He turned her around and kissed her, pressing her against the shower wall, his hard cock poking her stomach. There was no need to wait any longer. She grabbed his shaft, lifted her leg up and pulled him. Tyson crouched down so his cock lined up with her and slid all the way into his sister in one go. He lifted her up in his strong arms and held her in place against the shower wall.

They stood there for a moment, his cock filling her snug, stretched pussy, her legs wrapped tightly around his body, and looked into each other's eyes. There was no hesitation, no indecision, no uncertainty... they both saw nothing but love, desire, determination to be together. Without a word, they resumed kissing passionately and Tyson started to fuck his little sister. His tongue assaulted hers as his cock pounded in and out of her receptive, grasping cunt. He squeezed her tight little ass in his hands as she undulated against him, fucked him back enthusiastically, as if their lives dependent on this union. As they moved together, he felt his nut coming quickly. He wanted it to last, but she felt so good, she was giving herself to him so completely, the act itself was so steeped in emotion, that before he could even try to forestall it, he was roaring her name as he fired his cum into her, rope after scalding rope of his pearly batter straight to her waiting womb.

Sabrina felt it, her brother's cum, into her pussy, and that delicious dirty thought triggered her orgasm as well. She clinched him with her arms and legs, and rode him through it. Those few seconds felt like an eternity, as they held each other, cumming together. At last, they were able to relax. He took the sponge, got it good and sudsy, and washed and rinsed them both again.

Tyson turned off the water and they dried each other off, softly, lovingly. He took the time to admire his sister's body, so sleekly curved. Hand in hand they walked into her room, stood by the bed kissing, and together fell into bed. He licked and kissed down her body, tickling her skin, making her moan as he sucked her nipples. He made her giggle as he tickled her belly button with his tongue. He made her gasp as he nuzzled his nose into her soft pubes. She spread her legs as if her big brother licking and sucking her pussy was the most natural thing in the world.

She held his face against her as he nursed on her clit, gently sucking and massaging it with his tongue. Her gash was dripping her honey all over his face and he greedily swallowed every bit. He applied more pressure at her opening, drawing out more of her golden sweet nectar that was tinged with his essence. He slid a finger into her tight canal and worked her G-spot, stimulating her inside and out. She knew it wouldn't be long... She tightened up, surrendering herself to yet another orgasm given her by her brother. As she floated back down, she thought, absently, 'Hell, no, she wasn't sharing Tyson with anyone.'

She felt him making his way back up her body. He kissed her deeply, and she opened her mouth to him as he shared their tangy essence with her. She felt the tip of his hard shaft gently nudge against her sex, and without a moment's hesitation, she opened herself up and pulled him back inside her. They moved together like two parts of a well-lubricated machine, as if this was their thousandth time, not their first. Her tight feminine sleeve gripped him, and she repeatedly flexed her Kegels as he moved inside her. He'd never felt anything like that before, and it was drawing his orgasm right out of him.

They kissed deeply as they fucked, the intensity growing, until, again practically without warning, he exploded inside her, forcing it straight to her womb. His powerful jets of cum triggered her orgasm, and her pussy pulsed and surged, drawing his seed deeper inside her. The idea that she may have just been bred by her big brother, never even registered. Overwhelmed by the sheer emotion of the evening, they both promptly fell asleep.

*****

Dana was waiting for Marcus at home, though she couldn't shake the image of her father and the allure he now inexplicably held. As she helped Marcus throw his filthy work clothes, covered in Martian dust and meteoric residue, into the cleaner, she looked forward to their reunion later that evening. As she started the cleaning cycle, she was struck by how her thoughts were so heavily centered on her father. And the fact that Marcus was back in no way abated those thoughts.

Dana waited in bed while Marcus showered. As she waited, Dana was deeply conflicted. She couldn't understand why she wasn't more excited about being back together with Marcus. Was it that she was still upset over his desire for a 'harem?' That didn't feel like the truth. She wasn't really upset anymore, though she probably would be if they discussed it again. And it still didn't explain her sudden and almost irresistible urge to go to her father.

She heard the shower stop. She knew she'd have to perform. She was a woman, so she knew she could pull off a believable performance. The unanswered question was, WHY? Why was a performance necessary? She loved Marcus!

Didn't she?

Dana got up and went to join Marcus in the shower. He smiled as she slipped inside the stall. He took the soap and proceeded to lather her up. She liked his rough hands gliding along her soft, smooth skin. He was touching her just right, and as his fingers slid along her slick lower lips, searching for her magic little bean, thoughts of her father slipped from her mind. Marcus couldn't wait, and he figured this was just one of many sessions for the night. He lifted her tight little body up and braced her against the wall.

She spread her thighs expectantly and with the sure skill born of experience, he slipped his thick rod into her tight, yielding pussy. They both moaned with the pleasure of being back together again. He held her up with his hands on her firm ass and her back against the wall of the shower. Their mouths found each other's, and they kissed deeply and passionately as they moved together. In the heat of the moment, it was easy for Dana to believe that nothing was amiss, and that her affectation with her father was just that... a harmless daydream.

Her hips moved faster; she squeezed him tighter; she moaned louder, her overheated cunt was trying to milk the cum right out of his balls... He'd do it this time... He was about to get her pregnant! She felt him shudder in relief and then she felt him firing his seed inside her. This was it! she thought, as his orgasm released him.

They rinsed the sex off them in the cooling water and then got out of the shower. They both dried off and fell into bed naked. Marcus had just fucked her hard and fast against the wall. Now he wanted to make love to her, for the rest of the night. He kissed her lower until he tasted her sweet sauce. Sadly, it was tinged by his own flavor, which he hated. But Marcus knew that three minutes eating her out earned him an hour of head from her. It would only be better once he got his harem!

He kissed her outer lips and her clitoral hood, being careful not to slip between her lips to her wet center. She moaned in pleasure... this was his cue. He kissed back up her body to her lips and laid over onto his back. Dana knew what was expected and she responded as she always had. She took him into her mouth and took him into her throat. She sucked him hard like he liked it and caressed his head with her tongue. She let him slide in and out of her mouth, face-fucking her with increasing fervor. He held her head in place against him and pounded his hips against her lips. She was repeatedly taking him in and out of her throat.

Marcus' moans got louder as his hips moved faster, his cock sliding between her lips. At last, he tensed up, and his whole body tensed up as he fired his cum into Dana's throat. She'd long learned to fully relax her throat and not gag, and Marcus loved that about her. He'd planned on one more time, but the exhaustion of the expedition along with the force of two intense orgasms knocked him out like a light. Dana lay there feigning sleep but thinking about her father. She was so absorbed in thoughts of Anthony Glass, she didn't think about how unsatisfied Marcus left her.

*****

Nate was back home and the expedition had been a success. Chase worked an entry level position in Terraforming. Nate knew that he was studying hard to move up the ranks, he couldn't be more proud of him. If only his daughter cared about anything more than socializing. At any rate, he was excitedly telling Chase the details of the expedition, how they found so much ore, and that there may have been a meteor strike on the planet.

Jenna came out of her room. She was going out, and as always, she looked incredible. Nate made sure not to ever look too closely at his daughter, because as sexy as she was, it would be all too easy for a father to get inappropriate ideas about his little girl. Lately, it had taken all his concentration to keep his mind focused whenever he was around her. He'd never had that problem before, but lately he found himself wanting her like no father was supposed to. Luckily, his wife was the beneficiary of these desires. He found himself pounding his wife mercilessly even as thoughts of his sexy daughter flitted through his mind.

Chase wasn't so lucky. Jenna came out of her room and Nate could see on Chase's face that he was short circuiting. His eyes tracked her every move, and he was too young and inexperienced to hide his obvious desire.

Softly, so only Chase could hear, Nate said, "Boy, she's your sister!"

Just as softly, Chase answered, "I know that dad. Hell, she's also your daughter." Maybe Nate hadn't hidden his glances as well as he'd thought.

Rather than answer his son, Nate said to Jenna, "You gonna be out late, sweetheart? You know I worry."

"Don't worry about me, Daddy. I'll be fine. You should be worried about Chase's boring ass, never going out!"

"I go out!" retorted Chase.

Nate said, "No you don't, son. You're always studying. You should go out."

Jenna surprised them both and said, "Prove it. Come out with me. It's not a date, it's just friends hanging out Underground. The girls all like you."

Chase stuttered, "I... uhh... I..."

Nate said, "Go. That's an order. And you better have a good time."

Chase threw on a different shirt. They put on their air-suits and left. They dressed nicely because the Underground Complex was self-contained and they could take off their air-suits. There were a few entertainment areas there and two were large and well equipped. The twins headed out. As they left, Nate impatiently looked forward to his wife getting back home. It had been two weeks, and looking at Jenna didn't make things any less hard.

*****

"Alright, let's get started," said Devon Jacobs, bringing the meeting to order. "Hydroponics?"

"Everything is status quo, sir. We are operating at peak efficiency, and in view of the news we got last month, we may even have to back down on performance."

"Understood." He turned to Nate Bolinger. "What's the latest with Terraforming?"

"Well, as you know, there is a huge iron ore deposit about 500 klicks from here, near Hubris. We ran our tests, and both the quality and the quantity are higher than anything ever found on earth. We're pretty sure we can kick start an industrial age right here on Mars."

"Have you started extracting?"

"Not yet, sir. We've been scanning the surface and there seem to be enough of the other minerals needed for refinement. Plus, we need to build a smelter to produce the finished steel product. That will take up to four months to build. Since there's some wreckage from the billionaires there, we'll use what raw resources we can find and build the refinery there. While we're building that, we'll also build transport to get the finished materials here so we can use them to build here. By the time the refinery is online, Dr. Olivaw should have at least a few of his prototype robotic workers to assist."

"Robots on Mars?" asked Jacobs.

"Not yet, sir. These aren't humanoid or android units. Think of these first units as very advanced shovels and wheelbarrows," he responded. "He is working hard on humanoid prototypes, but frankly, he's just not there yet."

"I see."

"Anyway, the units he can build in quantity right now are perfectly suited to the extraction and refining work we need. As soon as the equipment is done, we'll be ready to get started."

"That's impressive work, Nate. Damned impressive. Keep it up!"

"Thank you, sir."

"Anybody else got anything pressing?" No answer. "Then go! It's the weekend. Go enjoy the red sunshine!"

*****

From the first time they made love while in space, Devon tried to get Vanessa to promise they would stop... and never again be inappropriately intimate... it was too risky. Naturally their love and their lovemaking never ended. She was his precious and he was her everything. They somehow managed to behave in public, so no one had any idea that the leader of the Mars Initiative was sharing a bed, or a life, with his daughter. Now, a Martian year later, they were hopelessly in love. A devoted couple.

Devon walked into the bunker he shared with his daughter. She looked worried. "Hey, sweetie," he greeted her. She didn't answer, instead she just looked at him, looking very serious.

"What is it, Nessa? Are you okay?"

She took a deep breath and paused. Then, "Dad, I'm late."

At first, her words didn't fully register. Then he caught up. "Late? How?"

She smirked and said, "Do I really need to explain that to you, my father, who I've been sleeping with for a year?"

He approached her and took her in his arms, holding her closely for a few moments. "Smart-ass," he teased. "I mean, I thought you had pills."

"I did have pills, but I ran out. Then nobody was getting pregnant, and neither did I. I don't understand!"

"Nobody was getting pregnant."

She looked scared now. "What do we do?"

He embraced her and smiled in her face. "We get ready to welcome our child."

"Really?" she asked, her face hopeful.

"Of course. What, you thought I'd say something else?"

"Well, yeah," she admitted. "But what will people say?"

He shrugged and said, "I don't know. That's Future Devon's problem. Current Devon is gonna take his daughter to bed and celebrate!"

He lifted her up effortlessly and carried her the few steps to their bedroom. He laid her on the bed, and they began kissing...

His lips began the familiar journey down her neck, sucking gently on the soft skin there, just enough to not leave a mark. She loved how much he liked to kiss and lick her body. As his lips found her nipples and he began to suckle on her small, firm breasts, she thought about how they might soon swell with milk. Thoughts of the pregnancy brought fresh worries. She pushed his head back, away from her breasts.

"But Daddy, what if I am pregnant? Are you sure it's going to be alright? Everyone who knows me knows it's just me and you here. I'm never around anyone but you. If I am pregnant, as soon as I start to show, everyone will know it's ours."

Devon brought his face back up to hers and kissed her gently. "Vanessa, my sweet darling. I love you so, and the thought of you having our baby fills me with so much joy..." he kissed her again. "And I swear to you, I won't let anything happen to you. People will talk. But as long as you love me, and know that I love you, I promise you, it will be okay."

Still worried, she said, "How can you be sure?"

"Have I ever let you down?" He kissed her face, this time tasting tears.

She sniffed and shook her head. "No," she finally said. "You always come through."

He kissed her tears and said, "That's true, and nothing that I've ever come through on has been this big or this important. I certainly won't fail you now."

Her tears ending, she asked, "You promise?" She searched his face. Vanessa saw the love he felt for her as well as a father's determination to take care of her... to keep her safe. She knew he'd be there for her. That's all she needed... to know he was there for her.

"Cross my heart."

Her fears allayed, she pulled him down on top of her and her lips found his, this time with her taking the lead. Their tongues dueled, moving together, fueling their passions. She reached between them and took hold of his hard rod, lining him up with her. Her legs opened wide for him and wrapped around his waist. She thrust up to meet him, eager for him to fill her. As he slid inside her, she was once again moved by how perfect it felt to be with him... Nothing had ever felt so right.

She whispered, "God, I love you, Daddy," as she began to climb toward her next orgasm.

Their mouths never parted as he fucked her slowly and deeply, taking his time and savoring the exquisite feel of every inch of her tight young pussy, pressing himself in as deeply as he could get. Her sighs, whimpers, and moans were the sweetest, most angelic music he'd ever known.

"That's it, Daddy," she breathed between kisses. "Give it to me... show me how you got me pregnant..." Her hips thrust up to him harder and more urgently, her soaked gash slapping wetly against him as her moans increased. "Mmm, Daddy, don't stop... fuck me, daddy, fuck your pregnant daughter... daddeeeee!" she screamed as her orgasm tore through her, surprising her with its intensity. Her nails dug into his back, and her teeth drew blood from his lip. Devon grunted and moaned loudly with her as he too became paralyzed with the intense pleasure of his own powerful orgasm. They held each other as the floated back down.

"I love you, Daddy."

"Mmmm... I love you, too, Nessa. Always."

"So are you hoping for a boy or a girl?"

"Yes," he replied, squeezing her to him as he drifted off to sleep.

****

Many of the men and women involved in the Iron Mining project had families, making the idea of a permanent move from the relative comfort of Terra Marta to the harsh and cold Martian tundra highly unappealing. To address this, they adopted a schedule of four weeks on and two weeks back home. This system proved effective, leading to significant progress over the next three months.

The smelter had been quickly completed and was now operational, producing high-quality iron and steel that were quickly transported to Terra Marta. There, the materials were quickly used to construct new buildings and infrastructure to support the expanding city. Tyson Cho implemented a system for grading and leveling the terrain between the dig site, the smelter, and Terra Marta, which significantly reduced transportation times. With improved roads, their hovercraft could travel at double the previous speed.

*****

Marcus was about to leave for his first one-month stint at the iron mining site. He went to kiss his girlfriend goodbye.

Dana Glass looked both glum and anxious. Marcus thought she was upset that she'd be missing out on sex with him for the next four weeks.

"Dana, you know I don't want to go to that dig for four weeks. But it's my job. Everybody has to go."

"I know that, Marcus. That's not it," she said. She took a few minutes before breaking the bad news. "It's just that, well, when you get back, I won't be here. As soon as you leave, I'm going back to my dad's bunker."

"But you're coming back, right?" he asked.

She didn't answer.

"You're coming back, right?" he repeated, louder.

She sighed and said, "No, I'm not. Look, this hasn't been working for a while. Not for me, anyway. You made it clear that one woman isn't enough. I personally don't understand these skanks willing to share a man--"

"We have a planet to populate!" he retorted.

"And it can be populated without guys having harems," she shot back. "My dad says the same thing. He says that this is just guys taking advantage. And don't pretend you don't already have your little twinkies all picked out and ready to come on in! Well, the three of you or the four of you, or however many there are, can have fun. I won't be here."

Marcus sighed in irritation. "Fine! I won't have them here," he offered.

Dana scoffed and rolled her eyes. "Boy, I was born at night, but it wasn't last night! I don't believe you for a second."

"But Dana--"

She raised her hand to silence him. "Marcus, it's over. I'm not mad... I'm just gone. I wish you well and I'll see you around, but this is over." She kissed him on the cheek and turned to finish packing her own bag. Marcus saw the Rover already waiting for him. He took a last look at her. He put on his air-suit helmet and left for the dig.

Dana waited for her father to come and pick her up. As she finished packing, she didn't feel an ounce of remorse or doubt about ending things with Marcus. Over the past few months, she and her father had been getting increasingly closer to crossing the line from flirty to involved. Dana was sure her friend Sabrina had already crossed the line with her brother Tyson. Dana had decided to stop fighting it and was determined to make her dad her own.

She saw him pull up in his Rover and eagerly went out and climbed aboard with her bag. Ten minutes later they were walking into his bunker. She walked in and tossed her bag onto her bed.

Taking off her helmet, she asked, "Dad, are you sure you don't mind me staying here? I mean, I wouldn't want to cramp your playboy style." She laughed playfully.

Tony just scoffed. "Some playboy! The only woman I spend any time with is my own daughter. The guys even tease me about that."

"Oh yeah?" asked Dana as she began to unfasten her air-suit, revealing underneath, she only wore thin lacy panties and a barely-there bra. "Well let me give them something to really talk about."

"Dana, what...?"

"Come on, Dad," she said, stepping completely out of the unflattering protective wear, standing before her father like a lingerie model right off the page. "Don't act surprised. We've been teasing and flirting for months, getting closer and closer."

Tony nodded but remained silent, his helmet off but still in his air-suit.

"And now we're here." She approached him and kissed him full on the mouth, their tongues touching for the first time. "I'm not going back. I've left him. Daddy, I'm home." She kissed him again, deeper this time. "Now welcome me properly," she added, pulling him into his bedroom.

He quickly shed his air-suit leaving it on the floor next to Dana's. He shucked off his pants, shirt, and underwear beside the bed as Dana pulled him down on top of her between her spread legs. His mouth captured hers as he lay on top of her, his hard rod pressing against her urgently. The foreplay had been going on for months... now it was time for Tony to fuck his little girl until she couldn't take it anymore.

He abruptly left her mouth and went down to feast on the syrupy goodness between her toned thighs. Tearing away the flimsy garment barely covering her soft hair, he opened his mouth wide and devoured her, his tongue lapping at her entrance, generating and then drinking the honey she was pouring into his mouth. He spent time nibbling her pussy lips back and forth, slurping her juices as he alternated between them. She was leaking so much that it was running down between her cheeks. He didn't miss a drop, spreading her butt wide and running his athletic tongue all over her taint, and poking inside her tight, untouched butthole. He licked and sucked her, and she was rapidly climbing the first peak.

But more was needed... he could tell. At last he captured her clit between his lips and sucked it lightly and rapidly, his tongue flicking back and forth over her faster than she could believe. He sucked and suckled her clit, her vag, her ass, until she was almost there. Just as she was about to explode in orgasm, he slid a wet pinky up her tight chute all the way in. It was just big enough to feel amazing without hurting her virgin ass. As he ravaged her clit and pinkie-fucked her rear entrance, he slid two more fingers all the way into her soaking-wet pussy, and wiggled all three fingers inside her, triggering an ecstasy that almost made her pass out. Her whole body was paralyzed as the sensation took her completely... she couldn't even form a coherent thought.

He kept sucking and working his fingers inside her, feeling her pussy and sphincter pulse violently around his fingers and tongue, and he greedily swallowed all the honey she poured out. She was dead silent and stock-still, her only movement the thrumming, vibrating sensations inside her womanhood. As it gradually became less intense and she could at last move, Dana pushed him away... it had become unbearable. He sat back and looked at her with a satisfied look. Tony knew how good he'd made his daughter feel. If he was going to commit incest, he was going to do it right.

He gave her a moment to catch her breath... her orgasm had been so powerful, she was panting as if she'd been running for her life. He laid back on top of her, kissing her again, letting her taste herself on his face. He held his cock at her slit and pressed himself all the way in, eliciting a deep groan of pleasure. Dana moaned in satisfaction from them finally consummating their new relationship. No blushing virgin, she moved aggressively under him, and rolled over so she was on top. She rode him, her hips twerking a frenzy over his, his shaft flying in and out of her in a blur, fucking her like the raunchiest porn video. He leaned up and took a nipple into his mouth and sucked as she rode him. Knowing he was very close, he rolled them back over so she was on her back, and pulled her ankles onto his shoulders and pounded her cunt as hard and as deep as his cock would go. Just as his orgasm hit him, he recaptured her mouth with his, their tongues dancing together as he shot his cum over and over into her. Impossibly, she felt herself let go into ecstasy once again as feeling his orgasm explode inside her triggered another cum deep in her core.

As they settled down from their highs, their kisses softened until they just lay there, holding each other.

"God Daddy," she said, still breathing hard. "That was... that was beyond anything I ever imagined."

Tony smiled at his daughter. "I know. It was amazing, baby girl. "

"Will it always be like that?"

"I don't know... But I can promise you it'll always be with you. Only you."

She squeezed him tightly and they drifted off to sleep.

*****

Normally, when Tyson walked into their bunker after work, his sister Sabrina launched herself at him and began aggressively undressing him. They'd shower together and then she'd ride him until the first load of his creamy cum was safely inside her. This time, after his first month at the iron mine, once he was naked, she dragged him into the small bathroom that was now even smaller because of the presence of a large bathtub filled with soapy water.

"What the hell is this?" he asked. "You know there's not enough water for a bath!"

"We cracked it!" she said, beaming.

"What?"

"We cracked it!"

"Moisture farming?" he asked incredulously.

"No, sweetie... water farming!" Sabrina said excitedly. "Dana and I built a hydro-collector that reliably pulls five liters of water per hour, right out of the thin Martian air. And to celebrate, you and I are gonna take a bath in the first Martian water we created. Now get over here... your little sister is dirty," she said, pulling him to the tub by his rapidly hardening erection.

The last time Tyson had had been in so much water was back on Earth before everything changed. As he settled into the warm water, he thought he'd died and gone to heaven. When Sabrina settled in front of him and leaned back against him, he was sure. As always, his hands couldn't stop moving, caressing every part of her. They weren't sure how or why they'd fallen so deeply in love, and so suddenly, but they both knew it was real, and only growing stronger.

"So how was this month?" she asked as they relaxed together.

"Everything is going well. I think by next year the city will be unrecognizable."

"That's good. I'm so proud of you, Ty. You're a big part of any success we have here on Mars. But I have a little news of my own."

"Oh yeah? Bigger than creating a whole new water supply? Because that's positively huge."

"Maybe, but it's more important than that." She hesitated as he waited to hear her news. "Big brother?" she said.

"Yes, baby sister?"

"I'm... I'm... well, I'm late."

"Late? As in..."

"Yeah. As in pregnant. And I am pregnant. About a month along. I saw the doctor last week, and I couldn't wait to tell you."

Tyson was quiet as he considered the news... he'd gotten his baby sister pregnant. Something about that statement made his cock throb. Sabrina felt that.

"I was about to ask you how you feel about it, but I guess a part of you already answered."

Tyson just nodded his agreement. He pulled Sabrina's face toward him for a kiss, and said, "I can't believe you're having my baby! This is so incredible!" Their kiss deepened and Sabrina turned around in the tub, splashing water on the floor. They made out, their hands all over each other. Tyson's fingers found their way inside Sabrina, and he gently fingered her to her first orgasm of the night.

They got out of the tub and dried off, and he pushed her back on the bed and dove face first into her squeaky-clean pussy, licking and sucking her clit to yet another breathless cum. She pulled him up her body and spread her thighs wide to welcome him home.

"I'm pretty sure I'm pregnant," she breathed. "Let's make sure!" she said as she pulled his shaft into her eagerly waiting slit.

*****

When Marcus left for his first month on, Dana told him she wouldn't be there when he got back. She went back to her dad's bunker and seduced him. Now a month later, she woke up from a dead sleep and ran to throw up, barely making it to the toilet. Tony slept through it. Dana laid there wondering what she'd eaten that was bothering her so. The idea that she might be pregnant never occurred to her... nobody was getting pregnant. So how could she be pregnant? She needed to see the doctor.

*****

Two weeks later. Vanessa didn't get much sleep that night. She tossed and turned, worried sick... She knew she was pregnant. What if they found out her baby's father was her father? She knew she needed to see the doctor, if only to verify the baby's health. But what then? Would they scream "Incest!" as soon as they found out?

Her restlessness woke Devon. "What's wrong, baby?" he asked, concerned.

"Daddy, we're gonna be in so much trouble. This is still illegal," she said, her voice breaking. "What if they take our baby from us?"

He smiled gently. "Baby, we're not on Earth. This is Mars. There's no government here yet, and what authority there is, I'm at the head of. Honey, we're on an alien planet trying to survive. People might talk... hell, they will talk, but that's it. As the Commander of the Mars Humanity Initiative, I can assure you we have bigger fish to fry than who's sleeping with whom."

"You think it'll be okay?"

"I promise you it will." He pulled her back into his embrace, back into their preferred sleeping position. "Now go back to sleep. Take care of my new kid," he smiled.

She instantly felt better. Daddy would handle it. He always did... That's why he's in charge... she dozed off.

*****

Emmett Baker shook his head in disagreement. "Are you sure you want to let them know about this? I mean, Dev, this is... Man, this is gonna be a huge scandal."

"If it was just me, it would be. But it's how many so far?" asked Devon.

"So far, about fifteen," admitted Emmett.

"Fifteen couples! That's the scandal. A bigger scandal would be if I'm part of it, tried to hide it and it came out," countered Devon. "And make no mistake, it's gonna come out."

They walked out of his office to the conference room.

"I hope you know what you're doing," said Emmett softly. "I like you being in charge."

"It'll be fine," Devon assured him.

The room quieted and everyone looked up expectantly.

"Let's get started," Devon said. "First of all, I want to recognize the phenomenal work from Nate Bolinger and the entire Terraforming team. Thanks to them and the resources they're developing, we're well on our way to becoming an actual city. And a future without air-suits is, maybe not yet within reach, but certainly in view."

The people in the room sounded appreciative.

"Also, the so-called 'Sci-Fi-Science' that all of you made fun of has borne fruit. Dana Glass and Sabrina Cho managed to create a functioning water collection system. Once the stills are built each one will create from thirty to fifty gallons of clean, pure water every day. As soon as capacity is high enough, our engineers will pipe it to and from your bunkers."

The room broke out with applause. The only water they had on the planet was the water they'd brought with them, and it was thoroughly used, filtered and reused. Fresh running water was a long-wished-for pipe dream that was finally coming true.

He went on, "Now you should all know that they were not tasked to make this happen. They decided it needed to be done and, on their own time, figured out the solution, one which greatly benefits us all. And they did it while all of you teased them mercilessly.

"As a reward for their hard work and ingenuity, I'm creating a new division called Advanced Systems Research that they will co-chair. That department is tasked to invent those things that we don't have. I've already discussed with them the idea of developing transporter technology, anti-gravity technology, and faster than light travel. All sci-fi science. They've proven that they can do it once. I expect to see great things from them. Congratulations, Ms. Glass and Ms. Cho. A smattering of polite applause came from the staff.

"Now, for a totally different conversation. Dr. Baker?

Emmett Baker leaned forward in his chair. He took a breath as he considered what he was about to say. When he spoke, he was clearly measuring each word.

"What I'm about to tell you is important. It's private, and I don't really want to share this, but it could affect, well, all of us. It's just that--" He stopped, clearly wrestling with what he had to say.

"Get on with it, Doc," Devon interrupted.

Dr. Baker nodded and took another deep breath. "Fine," he whispered into the silent room. "It looks like the pregnancy drought is over. There are over a dozen young women currently expecting."

"That's great news," said Dr. Kaiser, the Head of Hydroponics. "We were worried about that and it seems to have worked itself out. What's the problem?"

Again Dr. Baker hesitated. "It's..." Silence.

Devon took the conversation. "What my good friend Dr. Baker is struggling with is, a little more than a dozen women are pregnant. Every single one of them is pregnant by a family member."

During the shocked silence, Dr. Karen Mitchell (Head of Environmental Sciences) said, "You mean... incest? Like, people are committing incest? How is that possible?"

Dr. Braden Westfeldt, head of Physiology asked, "What? How are you surprised?"

"Brad, this isn't normal! These people -"

"Karen, this isn't Earth," Westfeldt cut her off. "This isn't a normal, ordinary situation. We're on an inhospitable alien planet, Earth and everything and everyone we know and love has been destroyed, and we're the last of humanity just trying to survive. A lot of people are living with family members, and other than five babies, everyone on the planet is an adult. Under these circumstances, if they turn to each other for comfort and that comfort turns into something more, I'm prepared to give them some leeway."

"Wait," said Nate Bolinger. "So, everyone who is pregnant got that way through incest? And people having sex with non-family members are what, sterile? Are you saying that for some reason, only incest causes pregnancy?"

Emmett Baker nodded, "So far, that appears to be the case. And there seems to be one more facet to all of this. From what all the couples have indicated to me, not only are they succumbing to incest, it seems that that is now, well, preferable."

"Preferable? What does that mean?" asked Karen.

"What that means, Dr. Mitchell," said Emmett with some impatience, "is that of all the people available for them for mating, they have a preference for family members. Look, on earth, the way we were wired is towards what's called incest avoidance. It still happened occasionally, but incest was rare, and very much not the norm. Here, it seems that something is rewiring us away from incest avoidance towards incest preference, and only allowing procreation through incestuous mating. And these couples are the result."

"Then the human race is going to die out," snapped Karen Mitchell, disgusted.

"I can assure you that's not going to happen," said Westfeldt. "Fifteen couples can come in here right now and show you otherwise. Karen, if the only way to have children is through incest, then that's what people will do, and I promise you the stigma and the 'taboo' will be gone in a hot second."

In an eruption of sound, everyone began chattering noisily, opinions and concerns flying left and right. Devon allowed the conversation to continue for several minutes as everyone voiced their immediate views to whoever was sitting nearby. He caught Dr. Baker's eye. Dr. Baker shook his head almost imperceptibly. Devon held his gaze and nodded equally surreptitiously.

Dr. Baker cleared his throat and the room quieted. "Commander Jacobs, we haven't yet crafted a full set of laws and in the absence of that, we usually come to a consensus and defer to your judgment. That's worked well so far. With that in mind, what do you think?"

Devon took a moment to frame his thoughts. "I'm sure everyone here is aware of the new fad called 'harems', right?" All heads nodded. Devon continued, "So for some of you, the best chance for us to populate the planet is for people to get together with multiple partners."

Some people around the table suddenly found both their manicures and the light fixtures incredibly fascinating.

"I get it," continued Devon. "Better chances for conception, more genetic diversity and all that. Personally, I don't like it. It seems a bit, well, hedonistic to me. But I have no intention of trying to put a stop to it."

He paused and looked around the room. Interest in manicures waned and those people now looked vaguely surprised. Everyone around the table was now listening raptly.

He went on, "Look, these are consenting adults, choosing to do this. How is that any different from incest? At the end of the day, they are all consenting adults doing what they want, with who they want, for the purposes of populating the planet. Something, I might add, that we are actively asking them to do. While I have no intention of partaking in any harem type situation," he paused again, for several seconds. "In full disclosure I have to tell you that my own 23-year-old daughter is one of those pregnant women."

There was a collective gasp of surprise. Karen said, "Your daughter?"

He nodded. "That's right. And yes, I am the father of the child."

"That's horrible! And Devon, that's different. Multiple partners decreases the likelihood of defects while incestuous breeding increases the chances."

Emmet Baker answered, "Statistically, you're correct. But for one, multiple partnering hasn't gotten anybody pregnant while incest has. And secondly, every one of these women and their unborn babies are not only healthy, but unusually so. These are, so far, textbook pregnancies."

"All of them?" asked Devon.

"Every one of them," answered Baker.

He spoke using his command voice. "So, Dr. Mitchell's discomfort notwithstanding, what do we do? Nothing. These women will have their babies. When we left earth, incest was legal in every country represented here on Mars. As far as I'm concerned, adult consensual incest is legal on Mars and in Terra Marta. I will not attempt to regulate sexual behavior between consenting adults.

"The fact that these pregnancies are from incest will eventually come out. But I do not want it to come out from any of you. It's technically private medical information and none of you should know. Am I clear?" All present agreed. "We must grow our population. And if it turns out this is the only way we can do that, so be it. The issue is a non-issue. Is there anything else we need to address in this meeting?" His question was met with silence. "Have a great weekend."

As everyone filed out, Anthony Glass stopped and put his hand on Devon's shoulder. "Gutsy as hell of you to out yourself like that," he said. He looked at him meaningfully. They both nodded.

Nate said to Devon, "I agree. I couldn't have done that." He looked at Dr. Baker. "Look, Doctor, I have twins here. A boy and a girl."

"Oh? I didn't know your family is here. How old are your twins?" answered Baker.

They're twenty-two," he said. "About what you were saying, you don't think they're gonna--"

"Yes," Emmett interrupted point blank. "They absolutely are going to. I'd be very surprised if they aren't already."

Nate looked shocked.

Emmet finished. "And he will almost certainly get her pregnant. And there is nothing you or anyone else can do about it. So get ready to embrace your new grandchild."

Nate sat down abruptly. "Gonna need a minute," he said to no one in particular. Finally, he left the room, heading for home sweet bunker, with much to discuss. His twins?! Jesus!

*****

The gossip hit Terra Marta like a tsunami. Everyone had an opinion...

"You mean all of them are pregnant with weird little incest babies?! Ewww!"

"I heard the Commander's daughter is one of them. Talk about lead by example!"

"I heard that girl who invented the water stills is doing it with her brother, and she was one of the first girls pregnant."

"I KNEW I saw him making out with his sister!"

"When she said she was a 'Daddy's Girl', she wasn't kidding! Damn! "

"Those people are crazy!"

"So he's what... Grandpa Dad? She's Aunt Mom?"

... But the nature of the conversation quickly shifted...

"They're pregnant! How come I can't get pregnant? I'm banging three different guys!"

"I heard you can only conceive with a family member."

"My friend said she's thinking about making a move on her dad!"

"A family member?! Wait, only incest causes pregnancy? No way!"

"Damn, I don't have any male family!" "Then you're just gonna have to settle for being somebody's auntie!"

"I know this guy in Terraforming who said the IT boss was doing his daughter!" "How does he know?" "She's his ex-girlfriend!"

... until the consensus reached its natural conclusion...

"I'm wearing my dad down... any day now and he's gonna be mine!"

"My baby brother didn't even blink! As soon as I asked him, he jumped me... like he was just waiting for me to make a move!"

"Dude, who knew my sister was so fucking hot?!" "We all did, you lucky fuck!"

"Man, my daughter is all over me wanting a kid. I don't know how much longer I can hold out." "Why the hell are you resisting? Hell, I wish I had a daughter!"

"FUCK!" Who knew daddy-dick was so good?! I'm never going back!"

"My dad knocked me up after just one time!" "So did my brother! It's amazing how fast it happened!"

"Incest is disgusting!" "That's because your sister is a troll! My sister is fine as fuck!"

*****

Sabrina Cho was lying on top of her brother, kissing him ravenously, holding his head to her, her fingers gripping and pulling his hair. Her tongue invaded his mouth as she claimed him. Breaking the kiss, she pushed herself up so she was straddling him. Lifting up slightly she gripped his hard cock, pointing it up so she could slide down on it. She moaned throatily as she felt his bulbous head part her delicate lips and bore up into her until their hair meshed together. Nothing in her life had ever felt as right as fucking her brother. Whether it was their first time months ago, or their hundredth time, or this time as her belly was growing larger with his child, Tyson was her everything. She never wanted a day without him. And Tyson adored his baby sister. His heart and soul were hers to own.

******

Devon Jacobs roared in climax as he again spewed his seed into his daughter Vanessa. Her pregnancy had inflamed their sexual appetites, and it was a rare day that did not find them making love at least once. They lived together openly as man and wife. Everyone knew that the Commander and his daughter were sleeping together. Many disapproved, thinking it was immoral at best, exploitative at worst. Many more had no qualms with it, seeing the Jacobs' behavior as tacit approval for them to live their own sexual lives on their own terms. Devon believed that as soon as she delivered a perfectly healthy child, the first one conceived and born on Mars, they would quickly become old news and fade from the conversation.

******

Jenna Bollinger rested her head on Chase's muscular chest after another very satisfying session in bed. It seemed like since they'd started sleeping together, he'd filled out nicely. In fact everybody she knew seemed to look sexier, healthier, more fit. Maybe the world just looked better because she was in love. And then there was that: How the hell does a girl fall in love with her own brother? No matter... she had, and she loved him more than anything. She hoped he felt the same. She scoffed. How ironic... Jenna B, the ultimate "it" girl, totally sprung on her own friggin' brother!

"Jenna?"

"Yeah?"

"I don't want to freak you out, but I... you know I love you, right?"

"You better, you big geek," she answered, relieved that he'd said it first. "You know how many guys would kill to be where you are right now?"

"What? Naked with Jenna Bollinger in my arms?"

"Exactly. You better worship my ass!" she joked.

"I do, but what about you? I mean, I'm not just playing around here."

She was touched by how serious and sincere he sounded. And she knew despite her bravado, she loved him every bit as much. They were twins... they shared everything. Now they shared this love.

She looked in his face and kissed him gently. "I love you, Chase. More than anything. Okay? I know I talk all crazy, and that's just how I am. But you have me. Right here," she indicated her heart. "And I'm not going anywhere."

Their relationship had started suddenly without warning or prelude. They'd been sharing meaningful looks for weeks. Then, when their father was gone for his first four-week assignment at the mining site, Chase simply came to her room after everyone had gone to bed. He stood in the doorway looking at her. She pulled the covers back, and he got into her bed. Without another word, they made love, as naturally as if they'd been sleeping together for years. And the act was deeply satisfying. Chase had been a virgin, and while Jenna had some experience, no one had ever touched her soul so deeply as her twin. Every time since had been equally as fulfilling, if not more so. And they had never looked back.

"Especially now," she continued.

"Why? What do you mean?"

"Well, you know how we heard that nobody was getting pregnant?"

"Yeah," he answered.

"Then we heard that you could only get pregnant from incest, right?"

"Yeah?" he answered nervously. "I thought that was crazy."

She shrugged and said, "This is incest." Then she kissed him.

******

Marcus was enjoying a latte in a UC coffee shop when she walked in. When he saw Dana's baby bump, his heart leapt to his throat. For a second, he thought it might be his. Then he realized he knew better.

Once Dana left him, he'd managed to assemble his harem. Three beautiful young women rotating through his bed with no expectations other than sex. They were all sleeping with other men as well. Why should guys have all the fun? More partners, more chances, more diversity. But his seed hadn't taken hold in any of them. None of the men they were sleeping with had gotten it done, either. But Anthony Glass had quickly gotten it done. With his own daughter, no less.

"Hey, Marcus," she walked over and greeted him. "It's been a while. How have you been?" She got her drink and took a seat at his table.

"I guess it has," he replied, nodding towards her bump. "Is that why you moved back to your father's bunker? You were already sleeping with him?"

"Not while we were together, but I moved there to be with him," she admitted.

"Did you know about the thing with incest and conception? I mean is that why?"

"No, nobody knew that at the time. But once we landed on Mars, all of a sudden I became incredibly attracted to my father. And it was mutual. I've talked with other people who said the same thing. As soon as they got to Mars, they were overwhelmingly attracted to family members. Blood relatives. And for some reason it kept growing until it became irresistible."

"So people are fucking their dads and brothers, what, for fun?" he asked.

"That's one way to look at it," she said. "But it's more accurate to say that they simply can't help it. The pull is irresistible. If you had a sister you'd understand."

"Only child of an only child, and my mom stayed on Earth. Not even a second cousin in sight," he laughed. He looked serious as he asked, "You think it's something on the planet making this happen?"

"Yes, I do. Absolutely," she answered. "But who the hell knows? Nobody has ever lived on Mars before. Maybe this will be the new normal."

"What about birth defects? That's the biggest reason incest is frowned on."

"I don't think that's going to be a problem. So far, my pregnancy has been perfect. Even morning sickness was very mild. No, the way this has all happened, I think somehow the babies are going to be perfect. I don't think you're going to see any problems."

Marcus finished his coffee. "Well, for what it's worth, you do look happy. Like you said, I don't have a sister so I don't understand it. But I do understand it's not just you this is happening to."

"I am happy. Really happy. But how about you? Like I said when I left, I wasn't angry with you."

Marcus scoffed and said, "I'm 26, single, living on a planet where everyone is attractive, sex with multiple partners is encouraged and the planet provides built in birth control. What's not to love?"

Dana laughed, "I guess that's true."

Marcus stood and offered her his hand to shake. "Take care, Dana." He left and did not look back.

*****

Vanessa was sleeping soundly in her father's arms. Her pregnancy was progressing nicely, and she was nearly at term. In fact, they were expecting their son any day now. Suddenly the bed was very wet and warm. Vanessa and Devon both awoke suddenly and jumped up. This was it! They'd talked about it, and Devon, being well-prepared, did not panic. He quickly called his friend Emmett Baker who would be seeing to the delivery personally.

In preparation for the births, a small but well-equipped birthing center had been constructed as part of the underground complex they started building practically from day one. Devon and Vanessa arrived by Rover just 30 minutes after her water broke with Dr. Baker arriving a few minutes later. Four hours later, Samuel Jacobs became the first official Martian, conceived and born on Mars.

Two days later, he was joined in the small, brightly lit nursery by Madison Cho and her unexpected twin brother, Luther.

The next week greeted Paxton Glass. All four children were born perfectly healthy, and unusually cute... these kids were gorgeous! The same proved true of all the other children born to incestuous parents. Suddenly, the floodgates seemed to open, and on a weekly basis, the women began delivering healthy, beautiful babies, while more and more women became pregnant, all from male family members.

Daughters having their father's children... sisters happily bred by their brothers... easy, problem-free pregnancies... perfect, beautiful children. And just like that, Incest lost its taboo on Mars.

*****

Tony's IT team built a personal communications system for the residents. Unlike the multi-point cellular systems used on Earth, this one was based on digital radio which broadcast from a single point. It quickly became indispensable to life in Terra Marta. Nate Bollinger's team was expanded to operate and administer the system and keep it running smoothly.

Terra Martans were given computer instructions for the devices and were able to replicate them on their in-home Table-Tops. The system constantly monitored for incoming transmissions and then routed them appropriately, securely encrypting the calls for privacy.

"Sir, we're receiving a strange transmission," said Communications Tech David Johnson.

"Strange? What do you mean, 'strange'?" asked Commander Jacobs.

"That's unclear, sir. It seems normal, but it's not on any of our frequencies. If I didn't know better, I'd swear it's coming from Earth, sir."

"Earth?! That's impossible!" said Jacobs. "Let's hear it!"

Johnston put the audio on the loudspeaker...