The Device Pt. 03

########## The Pool ##########

"To be honest, I don't think it's that weird."

"Really? I thought you would've found it at least a little weird."

"Weird? You mean like fucking your sister in the middle of the night, with a massive alien dick, and a short fucking alien body."

"Well yeah but, my own mom? I mean maybe the infatuation with you makes sense, you're only a few years older than me, all guys with hot older sisters hear about them constantly. I figured most guys my age would rub one out if they had a sister like you."

"To be honest," my sister turned and faced me in her deck chair and she began to offer her retort, "there's an entire complex named after what you're experiencing. It's the Oedipus complex, and of course boys who are stunted emotionally are going to lust after their moms." Sarah closed her eyes and turned towards to face the sun again as she finished her point, apparently considering it enough to finish the matter.

The youngest of the two Thompson siblings were in the back yard by the family's expansive pool enjoying a day off school and work. They laid in the lounge chairs nearest each other, nearly finished with a smoothie Sarah had concocted. Mark had worn his signature plain blue swimsuit, Sarah something a little skimpier than she wouldn't have worn before her and Mark had begun their trysts. Mark had ogled his sister the entire afternoon after she had donned it, staring at her legs and stomach as she had become more bronze through the tan session. It was amazing how sexy a woman could be when she had been strictly off limits just a week or two prior.

"You think I have an oedipus complex?" Was all that Mark could manage to reply.

"To be honest, you've probably got that and some more coming to you. I don't think psychologists have a term yet for all the mental health issues you're going to suffer." Sarah dropped one side of her shades with her comment, striking a wink out at her brother in the process.

That was one of the things that Mark got off on the most now having started this alien-incest relationship with his sister. That they could enjoy fucking each other, using his new bodies in ways that were typically reserved for people in porn movies - then later they could be right back to a typical brother/sister teasing relationship that had more sex in the air than the Playboy Mansion.

Mark rolled his eyes again as his sister's latest comment. She wasn't wrong. His newfound powers came with a good deal of anxiety outside the patented horniness they enabled. He wasn't sure if he was abusing the powers the way he had been using them, and that had caused him to worry. But would the makers of the watch on his wrist allow him to abuse it if he was really using it so incorrectly? Surely the makers of such an amazing device would be aware of its effects on the human body, or at least they had a way they could monitor him should he misuse it.

He held his watch up to the air and rotated it so it caught the light from the sun. It still only had two of several inlets lit up. Short-Stack and Two-Arms were how he knew them. Two of his new best friends.

After having sat for a moment of silence, Sarah started her point again: "The Oedipus Complex is pretty fucked up. Debunked, but interesting."

"What is it?" Mark turned on his side to look directly at his sister.

"So, apparently a son or daughter develops a crush when they're younger on the parent of the opposite sex, then grow resentful of the parent of the same sex and represses themselves sexually." Sarah paused, adjusted herself, and turned over, exposing her back to the sun. "Basically, it means you have a crush on mom and probably a little rivalry with dad. That is, if you subscribe to goofy stuff like that."

"So, it's not just a crush towards mom, but hard feelings towards dad? That's intense."

"It makes sense if you're a man maybe. Something with men and trying to be the 'alpha' or the 'man' of the house."

Mark couldn't deny that the watch had given him a newfound sense of confidence and entitlement. It didn't quite feel natural, it was most certainly the watch's doing. There was something about being able to transform and gain new power that made one's bravado go off the charts.

"So anyways Mr. 'Man-of-the-House'," Sarah started, "would you be useful for once and go fill me back up on my smoothie?" She offered an outstretched hand with the cup of finished smoothie to her brother.

########## Dinner ##########

Family dinners were now amongst the list of things that had also become strange. Mark, Sarah, their mother Lianna, and their father Brian all sat around their dinner table with a meal Brian had prepared. It was taco night at the Thompson household, or "white-people" taco night as the family loved to joke. The tacos weren't terrible, but they were cooked with a bias against properly cooked Mexican food that was hard to deny.

Aside from Mark sat Sarah. She had on white pants and a black low ride top. Nothing terribly inappropriate, but she showed enough skin of her stomach that Mark had to sneak a few looks when he was able. For a dinner like this the whole family liked to dress up a little bit, even if they had nowhere to go. It made the night a little more special than dinner was normally, and it felt like a special occasion. Sarah was dressed appropriately, not looking to make a splash at such a family-oriented event.

Mark's father sat catty corned to him and wore a checkered button up and pants. A simple outfit that he typically wore to work, something designed (as far as Mark figured) to make him look docile to the other men of his office. Something designed to fit in, be the ideal vision of "work-appropriate". Mark wore a nice sweater and jeans. It may not be the symbol of rebellion that he wanted to be, but he figured it wasn't as terrible as the checkered plaid his father was comfortable with.

Mark couldn't help but think about what Sarah had said by the pool earlier. 'A rivalry with his father' she had called it. The Oedipus Complex. He had been the spitting image of a dutiful son for his family his entire life, he had looked up to his father. Now, having the power of the watch, he could feel the latent resentment slipping in, corrupting his image of his entire family.

Across from Mark sat the woman he couldn't stop thinking about for the past forty-eight hours. She wore black stockings that disappeared into a black leather pencil skirt that started midway up her thighs. The skirt itself gave way to a white sweater top that made more sense in the cold climate of the winter (although Lianna wouldn't die of heat stroke in their air-conditioning). The white sweater hugged Lianna perfectly, showing off the wonderful breasts she had been endowed with as a younger woman.

Even with his newfound entitlement, he still felt kid with a crush again - unable to speak properly around her, unable to look at her directly, as if she could see his intentions in his eyes. Each look at her outfit tonight at dinner felt like stealing, taking a minuscule bit of detail discreetly each time. It felt like stealing from his father, and he knew he loved every second of it.

Sarah knew why Mark was quiet tonight and was determined to use it against him. It started with light touch: moving around him a little too tightly when making their plates, grabbing his ass when their parents weren't looking. Now, at the table, she worked to escalate it.

See, a kick underneath the table here and there didn't make him nervous. Sarah and Mark were never truly stranger to each other, especially not as adults. What Sarah decided to escalate further too in the night is what really made him nervous.

"So, Mark. Big fan of your new watch I see. You ever take that thing off?" She announced to the table.

Mark instantly swiveled his head in the direction of his sister, staring daggers. She held a smirk on her face that could destroy kingdoms, bring down nations. How he responded could mean life or death for his future.

"Well uh," he was mid bite, mouth still full of taco, "it's a nice watch, am I not allowed to wear it?" He thought it best to play it nonchalant.

"I noticed that. I don't think you've taken that thing off in the past week or two." His father observed. "When did you get that thing anyways?"

"I got it last week, it's a new brand, they had a few people advertising at the gym the past month or so." He was thinking on his feet, trying not to get caught up in any lie too specific.

"Oh that's cool." His father insisted on continuing with the conversation, irking Mark. He gestured at Mark's wrist with his fork. "What brand is that, I don't think I've seen anything like it."

"I think it's like a, pop-up brand or something, isn't it Mark?" Sarah asked rhetorically. "Do they have a website or anything, I'll look them up?" She was clearly trying to push the limits around their mom and dad. Didn't she know this would screw her too if they found out it wasn't a normal watch?

Sarah was close enough to Mark that she could prop a leg up onto his from under the family dining table, she maneuvered her heel towards his crotch. As much as he was annoyed and nervous at the prospect of them being caught in such a fucked up situation, it turned him on beyond belief at the same time.

"I don't think they have a website, I think it's just a nameless brand, or it's an offshoot of something, maybe Casio or G-Shock." He continued, further impounding himself in the lie, "I think it was a one-off thing, they probably know someone at the gym and thought it would be a good place to sell something new." He sounded unsure of himself now, he was certain he was caught in the lie.

"Well, I'm glad you got something cool. I'm glad you're earning some good money there dude. Go to college and you can have as many cool watches as you want!"

Mark was praying that the conversation was done. Sometimes it just paid best to be calm and collected when lying, most people would grow bored if you didn't get too defensive.

"I agree with dad Mark, I think it's a cool watch and I'm glad you have it, even if it's a little weird you won't take it off." Sarah said. Just when Mark thought that he might get out of the conversation about the watch, she continued. "Mom, what do you think about Mark's watch? Pretty cool little design huh?"

Lianna had been quiet the whole dinner up until now, which wasn't totally like her. She wasn't the kind to go on and on, but she wasn't the kind to stay as quiet as she had tonight. She looked up from where she had been focusing on grazing her food and gave Mark's watch a look. He couldn't be totally sure, but she seemed to regard it deeper than his father had, like she had recognized it.

It was the most Mark had looked at her the entire night. Nearly two hours of trying not to meet her gaze in case she'd be able to read his mind, or his ogling eyes. She was gorgeous, with both beauty and sexual appeal to match.

Her hair dropped down further to her shoulders, her eyes a light brown. Her lips full, her nose perfect. Features Mark had never noticed before were speaking out fully, like being able to bond with someone you saw every day, but never really knew.

Lianna was a perfectly aged version of Sarah with larger breasts. Her clothing usually contained them, but it was as if her sweater tonight was put on with the sole purpose of pushing the boundaries of how tight a sweater could be around family without being erotic.

Mark considered Sarah's thoughts from earlier on the Oedipus Complex. He didn't think he hated his father, maybe loathed him at sometimes, but he was still a good father. He figured that maybe he was more upset that such an insane piece of ass like his mother would go wasted on someone who probably lacked the talents and prerogative to make use of her.

He daydreamed in that moment about the things he could do to his mother with just the two new bodies that he had discovered. Like Sarah, he could pick her up with four-arms, throw her over his shoulder and carry her off to the bedroom. With the strength it contained he would no problem feeling her body as he did so. He could probably carry both his sister and his mother off at the same time if he really wanted to. He could practically feel himself in the scene, telling his dad he was the new man of the house while he carried off his wife and his daughter. Maybe he could get really fucked and make him clean up after them, tell the girls to get some rest for the next round as he did.

With short-stack... well you could do what short-stack was good for: lay massive pipe. There was no other body on Earth that had a penis as big, and he intended to have his mom and sister worship it as the god it was. While the four-armed body was perfect for two women, short-stack wasn't at all disadvantaged. He could have both of them on it with both hands and mouths. He could put it between his mother's breasts as he stood over her, Mark imagined the motion he would have to perform to really make use of every inch of the cock against her chest, she might even come close to swallowing it whole if her tits were as big as he thought they were.

Lianna cleared her throat, Mark snapped out of his dream and realized he had been staring directly at her. She shot him a look back. Just when it seemed like she would say something insightful she spoke. Mark's heart raced at the prospect of questioning the watch deeper.

"I think it's nice. Those lights are cool, there's that!"

Sarah's heel was pressed fully into Mark's crotch now, putting a deep pressure on his dick. He was half turned on, half pissed that his sister had made an attempt to get his new powers discovered. He'd pay her back with a brutal fuck later, he was certain of it.

After that, conversation withdrew to normal. Sarah removed her heel eventually from Mark's crotch, Mark and Lianna both remained somewhat muted through the rest of the dinner. Mark kept his grudge towards his sister and refused to participate further with any extended conversation.

Near the end, while the family was finishing desert, a new light formed on the watch on Mark's wrist.

########## Revenge ##########

His mother, his father, his sister, even his older brother too. The watch brought a new complication to everything. Just two weeks ago Mark was content on starting college and going to the gym, and now he was worried about feelings between himself and the rest of his family, feelings that were primarily sexual.

Now Mark sat in his room. It had been hours since his parents had gone to bed, Sarah even went out with her friends for the first time in days. They had spent nearly every night for the past weeks together, usually fucking and experimenting with the new bodies. Was he upset with her that she had tried to oust him earlier just to get a rise out of him, or jealous that she had gone out with friends instead of staying in with him again and trying more?

It had been a while since Mark had hung out with his friends as well. Maybe it would be a good change of pace to go to a summer party, go up into the mountains. Maybe it would help get his mind off his watch, his sister, and his mom.

He stared down on the watch on his wrist and saw the new light that had formed after dinner. It sat there and beckoned to him, daring him to touch it and explore this new form. Was that truly what he wanted? To take this new body and go down another rabbit-hole? What if he became more lustful, wanted more control of his family?

An answer seemed to come in the form of a light-knock at the door. His sister must've came home, he didn't hear the front door, she must've come in a side door so she wouldn't wake anybody.

She open the door quietly, she was laughing, and drunk.

"Hiiiiii..." Sarah greeted him. "Hiiiii baby brother." She creeped further into the room, tip-toeing as if she was sneaking in. She must've sensed he was feeling tense. Sarah formed a pursed smile, her eyes had the lazy look of someone who had been drinking. "Is someone mad because they got teased by their sister about their alien waaaatch."

"I didn't think it was teasing, I thought it was rude."

"Oh c'mon," Sarah righted herself when she could sense that Mark wasn't feeling the joking vibe she tried to bring. She had her heals in one hand and brought the other hand up to help aid her argument: "What are mom and dad going to say? You have a weird watch on your wrist. You didn't think they would notice at some point? I was bringing it up now so they don't ask questions later."

Mark offered her nothing. Sarah smiled a little, squinted her eyes, tilted her head as she came to a more important realization: "You're mad I brought it up in front of mom aren't you? You were sulking all night and I forced a little awkward conversation huh? You're upset because of your little crush you pervert." Sarah, cheeks flush, continued, "don't be so upset. This is a little childish don't you think."

Maybe she was right, and maybe he was being a little childish. Still, he offered her nothing.

Sarah threw her heals to the side of the room and crossed the room to Mark. He hadn't noticed before, but she was wearing a, outfit identical to what his mom had worn to dinner. She continued to saunter over to his bed.

"Well, if you're really pissed off, you can take it out on me you know." She said in her deepest voice possible, tracing a finger from her pussy to her mouth as she walked closer to him. "Wanna hate fuck your sister because she's pissing you off?" Her finger traced around her lips now, probing onto her tongue on each rotation.

She reached the edge of the bed and lifted her leg up. Mark smelled the beer on her breath and... something more. He got a good whiff of a perfume he didn't recognize as his sister's instead...

"You can smell it huh?" Sarah leaned in on the bed. "Do you like the outfit, I was you undressing mom out of it with your eyes earlier." She dropped in onto his lap and laid there. "I'm wearing her perfume too. Stole it right before they went to bed. Smell like a lusty milf like our sweet, sweet, Lianna Thompson?"

Mark was struggling. This wasn't something simple like your crush giving you a deep hug or catching some ass at a football game. Mark doubted that his cock could get harder than it was right now. Even if he was mad at her, he had urges.

Sarah's hands wandered her body as she ground the back of her head into his lap. She was staring right up at him, looking into his eyes, thinking of ways she would torment him further. "We could hate fuck with your real body you know? I could suck you off right here, right now. Put your human dick into my mouth and poke the back of my throat?" She gave out a drunk giggle. "You know I have a dentist appointment in a week. They going to look at my throat and be so fucking confused."

Mark's cock actually did manage to get harder.

"You know there were some boys out with the girls and I tonight. Some of them tried hitting on me, I think they liked the outfit. A little hot out in this sweater, but I think it just turns men on more." She continued, "None of them have big. Alien. Juicy. Fat fucking cocks like my brother has. That's why I'm back here instead of going out with..."

Sarah's voice trailed off as she noticed the new light on Mark's watch. She nearly sobered up in an instant.

She nearly yelled in enjoyment.

"That's a new fucking body!" Mark brought his hand up to tell her to be quieter, lest they wake their parents with her drunk, loud, volume.

"That's a new fucking body Mark." She continued in a hushed, incredulous tone. Her eyes were wide with enjoyment. "Dude we have to see what it is, have you used it yet?"

"I haven't used it and I don't know if I want to. I don't know if I like what's going on with my body right now, with these bodies." He gestured to the watch. "I feel like I'm becoming... more lustful or something."

"Well of course you're becoming lustful, who wouldn't with these bodies. They're making us more fucking sexual, more prone to fuck than we were before. It's not like it's making us do drugs Mark."

"Well I don't know if I like that. I've never really thought of you and mom the way I do now, that's not a little disturbing to you?"

"Honestly, I feel like movies and books have prepared me for stranger things, somehow. I think we should lean into it if anything. As long as the bodies aren't like, making us take over the world, what's the harm?" She reached for his wrist and Mark pulled it swiftly back.

"No. I want to try this when I'm ready."

She reached for his wrist again.

"Oh c'mon. Let's just try it out!"

"No!"

Sarah straddled Mark's lap, moving quickly for a girl who just came home from the bars. She put her chest in his face and grabbed his arm, turning herself around and pressing her ass into him. She used her leverage against his waist to move his two hands together.

"Don't, fucking.. do it." He muttered against the strain of wrestling his sister.

Instead of stopping, Sarah offered another drunk giggle. It was more of a game for her than it was for Mark.

She was also very, very horny.

Just when Mark thought he could pull his hand in closer and pry it free of her hand she managed to maneuver it closer to his other hand, bring his palm to the light of the third inlet.

Mark changed.

########## Fear ##########

Sarah figured they may have gone too far.

Mark's new figure wasn't like the two that came before it. Nothing before Sarah now was as banal and fun like a two-armed man or a dwarf.

Mark's new form was more resembling a grey alien from Mars than a man. It was slender, about the average height that Mark sported normally. What made the form unique (and frightful to his sister), was his unique and plentiful appendages.

He still had two arms, but he didn't have fingers or hands, not exactly. Each arm extended into several long extended fingers like tentacles nearly a foot or two long each. He had three that extended from each arm.

He also has tentacles coming from his legs. He no longer strode on foot but was propped up by each long appendage beneath him. It felt strange, but in the body Mark moved effectively, moving side to side to test its weight. It took him no time now to learn each body and their unique physiology.

Well, the more normal parts took no time to get used to.

Sarah stared at her brother's new form. It didn't take long to guess at the unique sexual gimmick that it possessed.

Mark realized it at the same time and brought a tentacled arm up in front of him to the light, between himself and Sarah. The tip of his long tentacle opened, like thick foreskin on a penis to reveal a hole at the top.

"I'm a fucking tentacle monster. Jesus fucking Christ this body is fucked." Mark uttered in horror at his new form.

Sarah wanted to scream, to run. She knew the man inside the body was her brother, but for a moment in time the body did nothing but help set off warnings and fear across her. It was unnatural.

After Mark's initial shock passed, he began to truly feel his new body.

Each tentacle of his could be controlled individually. He thought, at first, that it would take a lot of brain power to be able to move each tentacle simultaneously and independently of each other, but the power and magic of the watch must've given him a boost when it came to the uniqueness of the new body.

And with control of each appendage also came the discovery of new pleasure centers on each. They weren't so sensitive as compared to say, a penis, but each tentacle end had a level of sensitivity, a level of pleasure derived from each touch. Would something like this feel more intense as you climaxed? Would everything climax as a whole, individually?

Mark looked forward towards his sister. He had maneuvered from the bed to the floor in front after making his change. She was cowering in front of him now, shocked as he was at his new, frightening form.

She was there, skirt half up, dressed in the outfit she was attempting to use to emulate his crush on his mother. Just then, a suggestion came from the body itself:

~she fucked with you, maybe it's time to fuck with her~

Without thinking he reached out with a portion of his arm and grabbed her nearest leg with a tentacle, wrapping it around her ankle. All sense in that arm lit up like electricity, like a thousand needles of intensity spiking throughout the individual appendage. It didn't hurt, it was amazing, like sense and pleasure combined into a new sensation of feeling.

Mark also found that he had more length on each appendage than he originally thought. He coiled his new finger around her leg once, then twice, and a third time. It was like he could stretch to control more of her.

"Mark, Mark!" His sister made a weak attempt to pull her leg back.

~ control her ~

He found it hard to argue with the direction the body was giving him. He extended a second finger on his opposite arm to her other leg.

~ fill her ~

"I think you'd had enough fun for one night Sarah. I think it's time for me to be in full control now."

Mark's voice was a higher pitch than it was before, but it still sounded like her brother. Sarah felt the same warmth that she had felt with his other bodies as his tentacles wrapped themselves around her leg, but now it was hyper localized to the points on her skin where she met his. His (what were they? legs/arms/fingers?) weren't as slimy as she thought they would be, but were lubricated enough that they didn't feel like they would rub her skin raw.

Mark pulled himself over her with his body, gliding from the floor back to the bed, and planted two new tentacles further up her tights, pushing her skirt up and finding the top of her stockings. He glided the tip of his appendages into the top of the stockings and glided down further, spreading a brighter heat and electricity to both siblings everywhere he made contact with her skin.

Sarah's fear was quickly overtaken by intrigue the more that Mark's new body made contact with hers. Even if she wanted to move her legs, even if she had the strength to overpower him, she now wasn't fully sure if she wanted to.

"Mark, I..."

Mark moved a tentacle to both of Sarah's arms, pinning her down on the bed fully.

"I think it would be best if you shut up now." He commanded her. Sarah carefully complied.

From there he moved one tentacle that had found its way under her stocking and crept it further up her inner thigh, wrapping it once around her leg.

~ not too tight now, don't constrict her, control her ~

He loosed the grip he had on her leg slightly, moving his appendage further and further closer to her womanhood.

"What a surprise, you wore panties tonight." Mark's new finger flicked back and forth forcefully on her underwear. He dragged it across and then downward towards the bed. It must've been a thong, he could more skin than panty towards her asshole. He drew the tip to her ass and gave it a slight probe.

"Fuck, you don't even have that lubed yet Mark." Sarah's voice was both pained and pleasured as she spoke.

"What did I just tell you." Mark spoke with authority. He moved a new tentacle to her throat and wrapped it tightly for a moment, not enough that it would choke her or maim her permanently, but enough that she would struggle with her breath.

Sarah indeed struggled with her breath. It would be worse if she wasn't already into this kind of thing.

"When I remove my arm, I want you speak once and tell me that you want me to fuck you with these new arms." Mark told her. Sarah managed a nod back at him. He loosened the arm.

Sarah drew in a sharp inhale, "please," she managed through a new breath.

"Please what."

"Please fuck me with your arms." Sarah's eyes were half closed, both pleasure, pain, and the alien heat rippling through her body where her brother's form was touching hers.

When she was finished speaking, Mark tightened his arm again, this time not enough to choke. He brought the appendage, still coiled neatly around her neck, to her chin, then traced her lips like she had traced them earlier. The tip was a smooth, abrasive mix on her lips. Sarah looked down as it did its motion, probing her lips for weakness. The tentacle had its head drawn back, the tip was smooth and had a small hole directly in the middle. She figured each must be its own penis head individually. Even under Mark's control, Sarah figured she could maintain at least a little agency by trying to focus on the absurd biology of the new alien body.

Mark didn't play at foreplay much longer with his sister. He traced her lips one more time and then pushed on deeper into her mouth. He could feel every centimeter inside. He stopped for the briefest moment to flick the tongue about the inside, feeling the smoothness of her teeth, the wetness of her tongue. He could feel with incredible detail the top of the roof of her mouth and the sides of her cheeks. He pressed on further in.

Mark found the way the arms behaved to be intense and wonderfully inconsistent from use to use and arm to arm. He had his other appendages wrapped tight around Sarah's body, but they weren't too hard where they needed to work in length to control her. Now that he had a finger in her mouth however, he felt that he could make it harder when it needed to be, probing back further towards her uvula now towards her tonsils. He pushed further in, maintaining sense where the upper and lower part of his appendages came into contact with her.

~ feel her everywhere, become part of her ~

Sarah's eyes were closed as her brother pushed an alien tentacle further into her mouth. She thanked God that it wasn't too big that it made her jaw hurt.

"I can feel everything inside you like this. I wish you could feel this like I do sis." Mark told her enthusiastically. "I can feel your tongue running on me, I can feel the imperfections on your lips. This is so fucking good."

Like they had a mind of their own, the tentacle that once sat on the lips of Sarah's ass began to probe again, lightly at first. Mark snuck another tentacle up towards her panties, pulling and pushing them aside. Sarah still sprawled on the bed, her arms pinned down by his. Mark's new alien head and eyes barely managed to look down at her, clearly taking in all the sensation he needed through physical means.

The head of the arm looking for her pussy found its target, pushing the panties aside. He used another incoming arm to grab and pull them aside where they were no longer needed. He probed her there, switching between rubbing her clit and flicking an inch here and there into her. Mark used his sense to stay laser focused on her clit. Sarah moaned easily in response. She was his to control, but he wasn't going to be an ungenerous master.

All his arms now began to further infiltrate their targets. He pushed in past Sarah's tonsils into her throat with his first, he kept a slimy arm on her clit, feeling her short pubic hair as he gave her more finger deeper into her vagina. Mark's arm sitting to wait to penetrate Sarah's ass finally gave a forceful push as it founds its home deeper into her ass. He could feel the skin, the imperfections, the ripples of all three cavities with his arms, it was an intense pleasure like he had never known before.

There Mark let himself fall into a rhythm, pushing and pulling, letting Sarah's lips, ass, and pussy move with him as he drew his appendages further in and out. He found the tightness of her ass was doing the most for him, a climax built in that arm more than it had in the others, and after only a minute he could feel it getting close to the point where he was sure it would burst.

~ you control her now ~

Mark's intuition of his new body grew as he felt his lower appendage become close to climax, he knew now that he could control each of these so individually that one climax didn't have to mean a climax for the others.

"I'm going to fuck you until you can't be filled anymore." He told her. She could only open her eyes in anxious anticipation as he spoke. Tears began to fill her eyes and stream down her cheeks. "Here it comes big sister, your ass first."

True to his word, his lowest appendage engorged in size inside her ass as cum streaked towards the tip. Mark held it still inside her as he pumped in hot streak after hot streak of cum. Where his tentacle met the lips of her ass it began to ooze and spill onto his bed.

"Let's see how long your slutty little body can keep me pumping. I think your ass is my favorite hole right now, should we fill it up again?"

He pulled the existing tentacle out, used her sweater and attempted to wipe it clean, then put a new, fresh tentacle inside her and started the same rhythm from before to fuck her. Sarah let out a low, guttural moan from her mouth that vibrated his tentacle housed inside. Before Mark knew what he was doing the tentacle there pulsed and blew a load inside her mouth. Despite all the talk and want of control, the baby brother inside the alien body on top of her withdrew the arm long enough for Sarah to spit out the excess cum and recover from the immense alien load he had deposited.

He stroked a gentler rhythm in those few moments, allowing his sister to recover from the minutes of sheer control and ruthless fucking he had given her.

"Fuck." Sarah managed after a minute of catching her breath. Mark's arm he had used to fill her mouth was still around her neck, head partially limp to the side. "Please keep using me."

So Sarah was enjoying this.

"Swallow. Show me." Mark barked at her. Sarah shut her jaw, locking eyes with his alien head, gulped down her meal and stuck her tongue out after. She had cleared her mouth of all but residual hot alien goo and most now resided fully in her stomach.

"Good, let's keep going."

Instead of simply replacing the tentacle he had recently withdrawn from her, he replaced it with two fresh new tentacles from elsewhere on his body. Sarah's mouth distended, he pushed the limits of what was comfortable in her mouth and knew he was pushing her past her limits. He did the same in her pussy, pushing another fresh tentacle beside the one that already existed, pushing deeper in deeper in all three holes. He put another set under her shirt to feel her breasts, one on each. Each tentacle wrapped its way around them and squeezed, using the tip of each to play with her nipples.

For at least ten minutes this continued. Mark stood over her and stuff her holes, using a tentacle to pull her hair here, running another along her stomach. The sensation and focus of the alien body allowed him to enjoy each individual sensation of her body all at once, leaving nothing to over-stimulation.

For Sarah, she could do nothing but let the pain and the pleasure wash over her. She was pinned on the bed, mouth stretched and body constricted, but the hot sensation of the contact of the alien body kept her legs and arms stiff. It was amazing how such a situation could stretch the limits of the human body. She had no doubt if she was in the same situation elsewhere she would be in pain and looking for escape.

Mark filled each hole again of Sarah's. His dual tentacles that filled her vagina pulsed in unison as he let out a load of each. He withdrew the arms and let the cum soak out onto the bed. His arms in her mouth soon did the same. He let one come out earlier than the other, two hot ropes of thick, grey liquid leaped onto Sarah's face from the tip.

He kept his arms on her for another moment, letting the image of his sister's cum-filled and oozing holes burn into his brain. Sure, he had fucked her before, but it always felt like a little bit of a partnership. Here, he had debased her, used her, filled each hole and left her useless on the bed. Mark felt a pang of regret fill him. It was hot, but here was a sister that had cared for him, joked with him, wrestled with him as kids, lying on a bed like a cum rag after a long evening session.

He was spent too. Even with the ability to cum as much as he could from each appendage, he felt tired. It was about midnight at this point, he figured he should probably find a way to get his sister cleaned up for the night, maybe get his room cleaned as well. Mark used the watch, attached to his chest now, and transformed first into his human form, then into four-arms.

Sarah was quiet. Awake, alive, but silent. She had spit out some of his cum from her mouth, swallowed the rest. There was a pool of cum on his bed where her hips laid. If they waited any longer she would likely rise from the bed with his comforter attached.

"I am going to need to get something waterproof under my sheets." Mark said under his breath.

He lifted his sister, careful not to get as much cum as possible on his floor. He carried her like a child to the shower, stripped her clothes, and started a warm bath.

########## The Day After ##########

Mark slept that night in his sister's room. They cuddled at first, then drifted away during the night, managing to keep at least a limb, a hand, or a foot touching at all times. Mark figured his sister would be at least a little upset with him, want to stay far away from him, but all he could tell is that she wanted him close, didn't want to swat and beat him away. It was good, especially considering the state of his bed. He did his best to pull the sheets off and keep everything tidy, but would have to wait out until tomorrow to use the laundry without suspicion from his parents.

He also had work tomorrow. His attendance there had been sporadic, but he was still going. He figured it best to maintain appearances, and he needed the money.

But at work, his mind was still back home, on fantasies, on his sister on his mother. He had left Sarah on her bed that morning, sneaking out before his parents started their day. She had slept through several alarms by the time he left.

Had he ruined his relationship with his sister with way he had taken her in his new body last night? He felt like something different then, something that crazed revenge and control. Would he be able to overcome those feelings the next time he tried that body?

Mark's phone buzzed with a text coming in from the family group chat.

** Going to be out for the weekend folks, works calling me away to LA, might be a couple days. See a movie or something, my treat! - Dad **

Mark's heart was racing. If there was ever going to be a time to make a move on his mother, it was going to be this weekend. With his dad out, he may never get a better chance.

A $50 gift card accompanied the text from his father. Did he have any idea he had given the go-ahead, if not explicitly, for whatever Mark had planned for his mother?

** I won't be able to make it, staying over at school this weekend! Sarah, Mark, Mom, have fun without me! ** His older brother responded.

Perfect, Mark thought silently to himself. With no interruptions from his brother, Mark would be alone with his mother. He had no clue what kind of move he could pull, what plan he could concoct to seduce his mother. It was one thing to try and make a move on her without the watch, that he was sure might fail, but with his new bodies he had a much higher chance of getting to fuck her once and for all.

What could he possibly do to break the ice. Maybe he could just go in like he did with Sarah. The bodies seemed to have a supernatural effect on the female body, it heightened his sister's sex drive, made her squirm when touched, even allowed her to push her body beyond its natural limits to fuck like no woman had any business fucking. If he switched into something right in front of her, would Lianna react the same way? Which body would he transform into? He figured that the tentacle body, Squidward as he knew him internally, was out of the question. That would freak mom out and she might run for the hills even if he could control its urges. Shortstack was an interesting thought, there was a number of ways that could work out, but his sister was quick to deride that body.

So then maybe it all came back to four-arms, the original. It was a solid bet, and if his sister was there, he could work on satisfying her at the same time, keep everything nice and clean between what would be his two new women. That is, if his sister would ever be on board with this new plan.

Just then a text to the family group chat from his sister:

** Don't worry dad, Mark and I will take real good care of your girl while you're out. Love ya! **

So it was decided.

########## Cleaning Up ##########

It had been two days since Mark took her in his newest form, a fucked up, squid-tentacle-alien type body. It was the sex dream of a pervert in which Sarah was treated more like a sex object of holes that were made to be filled, rather than loved and cared for. The night should've pissed her off, should've put her off from her brother forever, instead she found herself turned on more and more about being used and fucked like that.

And to be fair, Mark had the wherewithal to help her bathe herself at the end of the night, he even laid next to her in bed that night.

Did she like being used, being owned like Mark had owned her? Could she have the relationship she had before with him ever again?

These questions and more swirled around Sarah's head. She had missed class that day and called in sick, skipped the gym. She managed to get up out of bed, gathered the items in Mark's room that would need cleaning, and started the process of laundry.

Would she be doing laundry for someone she hated, or was she just more concerned about covering for herself?

"Awfully nice of you to be doing your brother's laundry."

Sarah's heart dropped. She turned to see her mother standing behind her in the doorway to the laundry room. She had her robe on, her hair was wet.

Sarah's mind raced. Had her mom seen her inspecting her brother's cum-stained sheets? Had she gotten everything inside the washer yet? Her hand was on the machine and it seemed to be vibrating, that was a good sign.

Lianna spoke again. "Do you owe him a favor or something? I can't imagine why you're doing his laundry, did he help with an assignment or something?"

Lianna's tone wasn't necessarily accusatory, but the way she was leaning against the entrance to the laundry room was imposing. Sarah's guilt told her on the inside that her mom knew everything, but her rationality told her otherwise. Her mom wouldn't sound so casual if she knew about her and Mark's real relationship.

Sarah thought of something on the spot, she had to form something of a believable lie: "Mark and I talked after I got home last night, I spilled water on his sheets and promised to wash them today."

"Ok." Lianna stayed there a second longer, looked at Sarah deeply in the eyes and then - moved past her, deeper into the laundry room. "Sorry to get in your way while you're washing hun, I just needed more soap for our shower, I swear your father goes through this stuff like its water." Lianna continued. "Say, since you're talking to your brother a lot lately, is everything ok with him? He's been feeling, distant, for the past few weeks. Is everything alright?"

"He's uh, in that weird period between graduating high school and waiting to figure out what he wants, I think." Sarah lied to her mother. "I don't even know if it's that deep." Sarah would have to work on riffing on the spot if this would turn to be an extended discussion.

"Well, if you say so." Lianna replied easily, easing Sarah's tension. "Think he'll go to UC Boulder like he keeps saying?"

"I think so. That's where most of his friends are going, most of mine that didn't go to community college."

"Well, regardless, I just hope he doesn't end up being as clueless as his father is sometimes. I ask him to keep the bathroom and shower clean, and do you know how disgusting it is right now? It's got soap scum everywhere, fucking disgusting."

Again, another mistake of Sarah and Marks. She'd have to make sure they double scrubbed next time she fucked him somewhere public enough for her mom and dad to see.

Next time they'd fuck. Sarah's mind had seemed to make the decision for her, the one she had been mulling over for the past few hours. Why did it seem like such an inevitability? Was he the man of the house, like he envisioned?

Standing here in the laundry room with mom, with only her robe on, she could see why Mark would be obsessed with her. Her breasts were double the size of Sarah's at a minimum. Her legs were toned and smooth. Lianna was the vision of the beauty of an older woman.

Thinking back, Lianna had mentioned before how her father could be useless and a bit childish. He rarely cleaned, worked a little around the house. When he cooked it was usually an event, because of course a man like him needed a deep congratulations whenever he did something the rest of them were supposed to do, things that needed to be done around the house.

Why shouldn't her brother be the man of the house? Why shouldn't he enjoy the spoils of these beauties that occupied it?

She had made up her mind. Mark was that man, and she would help him fuck her mother.

########## The afternoon before ##########

Sarah had avoided him for the better part of a day and a half. Mark wondered if he had made a mistake taking the watch and using its powers. Did the powers matter if they pushed away someone he loved when used incorrectly?

He felt bad about that and much more. It was his father's weekend away for business and Mark drove him to the airport. He felt guilt over the fact that the man he was dropping off - the man who had raised him - had no clue the lust his son had towards his own partner, his own mother.

They were at the airport, his father was grabbing his bags and getting ready to go to the ticket counter. Mark was ready to drive away before his dad turned around again.

"Hey. Thanks for agreeing to hangout with your mom while I'm out. I know it's probably a drag, but take care of her and your sister while I'm gone! You're the man of the house for the weekend, make sure you act like it."

His dad handed him a crisp $100 bill, as if Mark didn't feel bad enough, here he was taking the man's money too.

"I will dad, thanks." Mark said in too somber of a tone, his dad finally out of ear shot.

It was a long ride back to town. Mark stopped at work for his shift.

When he finished, he went home. He struggled. He could stay out and avoid Sarah and Lianna, tell them he was going out and staying at a friend's house. Would he feel worse avoiding them? He certainly couldn't do it forever. Besides, he had promised the family he'd do a movie night at their house, so his behavior would stand out even more than before. Maybe better to go home and face the music.

When he got home he opened his door to the smell of lemon, the scent they used to mop the floors. There was a candle going too, some fresh ocean scent. Lianna and his sister were in the kitchen, laughing and doing dishes together.

"Oh hi Mark, nice of you to show up once all the chores are almost done!" His sister shouted before he could get a word out. "We mopped and cleaned the bathrooms too, not that you men would care." Her tone was playful, inviting.

"Don't be so rude." His mother chided her. "He just got home from work, and he dropped your father off this morning. He doesn't deserve that."

"Sorry, sorry. I'm used to men skipping out on the work." Sarah locked eyes with Mark, Lianna was looking down at the sink and she used the opportunity to let out a small, but devilish grin. "Dad didn't do anything before he left, typical."

Lianna elbowed Sarah as she made the comment, Mark crept cautiously closer to the kitchen, moving his way past the dining room.

"He didn't need to do anything. He has a big work trip, he should be able to focus on it." His mother said, partly to convince herself.

Was Sarah doing what Mark thought she was doing?

"Mom, you said you needed help with your room right? Want Mark and I to go tackle that while you finish up in the kitchen?"

"Sure, that works for me."

"Cmon bud, follow me." Sarah beckoned to him. She grabbed his hand and led him up the stairs to their parent's room, pausing at the top, looking over his shoulder down at the common area of the house. She put a finger to his lips before he could speak.

"I've decided. You're the man of the house. Mom deserves a real man, and that man is you." She continued, eyes burning with confidence. "You're going to take her and I tonight, and then every hour you want for the rest of the weekend, and possibly more if you play your cards right." She allowed him no way to respond. "We're going to get her wine drunk tonight, you're going to switch into the four armed body, and you're going to watch your mother and your older sister do things that no mother and daughter should do together. Tonight, we're sleeping in her room, your new room."

Mark was stunned silent.

"Just follow my lead, and when I tell you to transform, you do it. Understand?"

All Mark could offer was a nod.

########## the night of ##########

That morning, that afternoon, and even late into the evening, Lianna felt a heat build up in her chest. She had felt it before, when she had felt the odd dreams begin to start. She was worried she was having a small heart attack at first, but had grown less worried when she had looked up the symptoms online. Some women reported this kind of thing when they got older, it was probably run of the mill heat flashes.

These weren't exactly like the flashes she had seen online. She was horny beyond belief, especially now that her husband had left. It took everything she had to not lock herself in her room and use a toy, it would've been difficult to get away on her own with Sarah being so insistent on helping her tidy and clean the house.

Sarah did seem to take a greater interest in her today. It was like being followed by a puppy all day the way they were attached at the hip.

Now all the cleaning was done. Sarah and Mark had made her an amazing meal, Marry-me-chicken they called it, she figured it had a more explicit nickname. Her kids were finishing up the dishes, whispering like best friends or lovers might. They stole glances at her when they thought she wasn't looking. Sarah had proven talkative, even for her, over dinner. Mark had barely said a word. Now that they were at the sink it looked like Mark was speaking more to Sarah than he had spoken to her all night.

There was the heat again. Sarah was sitting on the couch now, waiting for the kids to finish so they could watch the move she had bought online. The heat was there in her chest, heavy with each breath. It was there in her legs too, making her thighs burn up in all but temperature.

Sarah moved over to where she was sitting now, done with the dishes. Mark moved over to the opposite side of the couch.

"So, mom," Sarah began, hand on Lianna's arm, "Mark and I were thinking, since we're all hanging out now, watching a movie and staying in, we figure we might pop open of your and dad's bottles of wine, share it between the three of us?

"You two think you can help me clean around the house, cook me dinner, and I'm going to let you have some wine? You really think that?" Lianna's tone was casual and accusatory. She looked both at Sarah, then at Mark, trying to guilt them into rescinding their request. When they didn't, she figured they had earned a nice glass of wine. "Why not, Mark, what do you think we should have."

Without a beat missed he responded. "I'm thinking we do a red-blend, or a Malbec maybe."

"Interesting choice my sommelier. I think we have a bottle of malbec in the wine fridge in the garage. You want to go grab it?" She asked her son.

"Sarah, you go grab it." Mark commanded his sister. Lianna expected a harsh rebuke from his sister after such a direct tone, but, surprisingly, she did as he told her. Sarah got up, walked past Mark, let a hand drag on his shoulder and went to the garage. Mark spoke again: "I'll work on getting the movie ready mom, you deserve to relax."

He took the remote and started to search for a movie. What he chose was a new-age rom com, something about a woman hired to date a rich couple's son. It looked overtly sexual, from what she could make out on the graphic chosen for the movie, if not at least a little cute. He started the trailer.

The heat rose and began to hit her deeper than it had before. It had started to rise when Mark had told his sister to go grab them the bottle of wine. What was an annoying but easily ignorable sensation was now hitting her in droves. If Lianna was home alone she had no doubt she would've used her fingers on herself right there on the couch. There was no way she would be able to sneak away either now, not with her son and daughter expecting her to sit and watch a movie with them. Maybe the wine would offer her a reprieve from the burning inside her.

Sarah returned with the bottle and three glasses. She uncorked the wine, poured a fair share of the expensive bottle into each glass, and turned towards herself and Mark. Mark rose, took two glasses from Sarah and strode over to his mother with a glass outstretched. When she went to grab the glass from him, a jolt starting from her fingers went down to her elbow. It wasn't a real shock, but was like a bolt of lightning extending from him to her.

Sarah settled right beside Lianna, she curled up and had her feet resting ride beside Lianna. More sparks, this time on the leg that making contact with her daughter. How could she be feeling this way, heat and sparks and tingling all from the touch of her two children.

She hurriedly sipped her wine, hoping the feeling would go away, but it only weighed on her more heavily the faster she sipped. Before she knew it they were only five minutes into the movie and she had finished her first glass. Her chest and thighs burned with a deeper and deeper ache, it was as if she had hands all over, her feeling, grabbing her like a lover.

When she stood up to go get another glass Sarah stood up instead.

"I'll get you another glass mom! Mark, you want another?"

"Absolutely."

Lianna thought for a moment that she must've had some bad wine that had been sitting out in the garage. Whatever Sarah had grabbed must've gone bad, but why would it make her feel so fucking horny?

Sarah returned with another glass for each of the three Thompsons. She handed them out, as she gave Mark his Lianna could've sworn that he gave her a light pat on the ass. Was the drink making her imagine things? How many glasses had she had, she wondered.

The movie reached a part early on, as most these cheesy, sexual rom coms do. The two leads, clearly not meant for each other, start to feel the sexual energy between them. Typically, one or two have a boy or a girl they're unhappy with. What Lianna wouldn't give for a little more sexual amusement like that in her own life.

Sarah moved closer to Lianna at the peak of the first scene of contact between the leads. Lianna took down more wine. She felt a buzz, like numbness only, sexual, from her side where her daughter sat. She was so beautiful. It took all she had not to gawk at Sarah's ass as she got up to grab more wine. Where Lianna was top heavy, Sarah was bottom heavy. She shook her head to herself, trying to shake her new strange thoughts.

Her second glass down, not half-way through the movie. She looked, Sarah and Mark weren't nearly half done with their glasses. She nearly stood to grab another for herself when Sarah grabbed her arm. She looked to the TV.

There, the two leads were fucking. It was hot, extremely hot. Not the kind of scene you'd watch with your kids on a Friday night. Lianna stood again for a second chance of moving away, getting out of the situation, when Sarah whispered in her ear.

"I know how you feel right now." Lianna was stuck with shock and silence. "It's like static electricity, like a personal heater stuck to your thighs, huh mom?"

How could she possibly know. How could she possibly know the sensations running through Lianna's body.

"I was wondering if it affected you too." Sarah was now kneeling next to her on the couch, her lips were in Lianna's ear, she could smell the wine on her lips. Her eyes were open, not staring at Lianna, but at her brother. "It's him mom. It's Mark. It's your sons that's doing this to you."

Lianna was stunned, still. The heat was all over her now, hitting her in droves. The buzz, the static was building in her, tapping away at her skin.

"Mark. Go ahead and show her why you're making her feel so hot and heavy, would you?"

########## Fin ##########