The Device Pt. 04

########## Pause ##########

Mark rose from his place on dad's recliner and took a stand in the middle of the living room. His sister had given him the go ahead.

He took in the situation. His mother was on the couch, her cheeks were rosy and she looked like she was in half of a daze. He knew the effect that the watch had on his sister. It was likely the same with mom. The watch made them horny, suggestive. The effects would be even stronger once he used the watch to transform.

Lianna was on the couch, legs pushed together. She was wearing sweats and a t-shirt, something modest. Even with such a plain outfit you could still tell how voluptuous she could be, she was the epitome of a full, sexy, mature woman.

Sarah had chosen something more appropriate, but was still just as sexy as her mother. She had on workout shorts and a tight top, a t-shirt. She was on her knees on the couch, whispering to his mother, perhaps telling her about the things her and Mark had done, or what she should expect when he would transform.

Mark felt the cold metal of the watch on his arm. His hand went to it instinctually as he rose. His sister had suggested he use four-arms, he figured it made a safe choice, it was certainly the most functional with the situation in from of him. Still, he could choose differently - after all, he was in control, not her. A dwarf man with a large penis would make do with these two women, a tentacle setup with his third body would work wonders here as well.

Mark's finger went to the inlet that corresponded with the four-arm body regardless. It would be the most sensible now, his sister was right in her assumption. It would likely freak his mom out the least, considering their options.

"Mom, Sarah, I love you." Mark spoke with conviction.

And his finger pressed in, beginning his transformation.

Lianna watched, stunned, as a bright white light emanating from her son filled the living room. The heat, the electricity rose in every part of her. She watched as his body began to change under the light, from that of her son to a larger man, one that resembled more of a basketball player than of a nineteen-year-old. He grew stronger, taller, his legs became tree trunks and his shoulders broadened.

Not only did he become taller and stronger, but from under his arms sprouted two new arms, both becoming as wide and large as the original pair had in their transformation.

"Don't scream mom, just soak it in." Sarah whispered lustfully in her ear. Lianna wanted to yell, to run, but everything in her body fought back against better judgement. She was immobile on the couch.

When the light receded, what stood in from of her was not her younger son Mark, but a hulking seven-foot alien with grey skin and two arms, standing in a tight leather-like jumpsuit.

It was the man she had seen in her dreams, the one who had taken her, beside her husband, in the shower. It was her son all along.

Lianna was awe struck. Mark casually flexed his arms, his back. He used the opportunity to show the body off to both women.

When he flexed and turned his hands, his arms grew larger, more defined in their musculature. His chest was near perfect, striating and rippling under the sheer cover of his suit. When he flexed his legs she could see every muscle, every fiber react at once. He was Michelangelo's David, sculpted from perfection.

It felt like a while before Lianna noticed that Mark's jumpsuit was tight around his hips. Her eyes were drawn to an impressive bulge, lying there under the alien jumpsuit. If she had to guess, he was likely large down under that as he was in the rest of his body.

"He's perfect, isn't he? I don't think I've ever - could ever meet a man that perfect mom." Sarah spoke now, loud enough so Mark could hear her as well. "Do you want to reach out and touch him? Do you want to feel your son's new body?" When Lianna didn't move, couldn't move, Sarah continued. "That's ok mom, look, I'll go out and do it for you."

Mark watched as his sister got up from the couch and closed the distance between them. He stood there as a statue, Sarah started tracing his arms, working her hands on one of his lower arm's biceps. Her hands, tiny against his new body, worked their way over his shoulders, comparing hand sizes, feeling his shoulders.

"He's far larger than any man, far stronger than any man I've known." Her hands found their way to his chest, dropping lower and lower towards his stomach. "He's far more toned than any man his size too, do you want to see his abs mom?" Sarah's hands found the top of his jumpsuit, and with his help, pulled it over his arms and down to his waist, stopped low enough that another tank would show off his twin manhood.

Lianna saw that his abs were indeed chiseled, carved from stone. They were straight out of a smut novel, of a man you would find browsing the erotic section at a book store. She noticed her mouth was open, quite possibly drooling at the show her son and daughter were putting on in front of her.

"I can see you like it mom. You like your son's new body, and you haven't even seen the best part."

Lianna could take a guess at the best part of the new body, she had seen it through his tights, eyes drawn to a monstrous bulge beneath the fabric.

"Mom, I need you to tell me that you want to see it. I need to hear it from your mouth. Tell me you want to see all of your son."

Lianna couldn't have disobeyed if she tried. The heat, the static, it was building in her and she didn't know if she would be ok if it didn't release soon. She responded: "I want to see it."

"Good girl." Sarah replied.

She dropped to her knees in front of the alien man and gave a confident pull, the suit dropped to his knees now, then fell fully to the floor. Before her were not one, but two alien penises, freed fully from the oppressive suit.

They were both large, larger than any dick she had seen before, including her husbands. The heads were both large, and the shafts ran ridges along the top, poking up and down like waves along the length. Sarah posed with them, her cheeks touching the head of the higher dick, her head turned towards her brother first, then her mother.

"Mark and I thought that one got lonely when it only has one person to help work it. We thought you might be perfect to help me make Mark feel, more comfortable with his new body."

Lianna looked into the eyes of the alien, her son's new body. He looked up from his sister's display into Lianna's eyes. Her sweet, sweet son, displayed there naked in front of her, the pinnacle of sex and form. His look was lustful, confident.

Sarah was driving the show and was driven to not let the train stop or slow down. "Mom, I think you need a little help getting into the action." Sarah rose to her feet and walked back to the couch where her mom stayed, she grabbed both her arms and lifted her from her place.

In sweats and a t-shirt, Mark was struck by how truly beautiful her mother could be. Sarah moved herself behind her, putting her between Mark and herself.

"I know Mark's dying to see more of you too mom. I think I know what he wants to see first."

Sarah grabbed the lower part of Lianna's white shirt and started to pull it upward, slowly. She exposed Lianna's stomach first, then stopped below her breasts.

"Her workouts pay off a ton huh Mark?" Sarah asked her brother. All he could manage was a stiff nod, two of his hands were now slowly working both dicks as he watched his sister's lewd strip show of their mother, his other two rested on his hips.

Sarah lifted her shirt higher. Her breasts fought back against the shirt, lifting more and more, until finally giving way, letting the shirt climb and dropping down, settling into her bra.

They were everything and more of what Mark imagined. Lianna wore a tan bra, one that gave just enough support, but one that didn't need much imagination to see beyond.

Sarah threw Lianna's shirt on the couch, drew herself closer to Lianna. She peered over her mother's shoulder to Mark and grabbed both of Lianna's breasts, lifting them, squeezing them, giving Mark a show of their mother's body. She traced her lips on Lianna's neck and planted an open mouth kiss behind her ear, leaving a wet spot when she withdrew her lips.

"I think the man of the house should see what's his, don't you think so mom." She whispered the question in Lianna's ear. She let her hands go of Lianna and moved her hands back to the clasp of her bra, working the latch to free Lianna's chest. When it was finally loose, Lianna instinctually brought her hands up to keep it from falling, from exposing herself to her children.

That's when the grey, hulking alien in front of her moved towards her, closing the few steps that remained between them.

He was even more impressive up close.

Lianna's eyes traced his figure as he stepped towards her. His arms were massive, his chest perfectly defined. She watched as his twin dicks swayed with each step, thick greyish-pink heads bouncing with his motion. Her eyes were locked to his waist when he was finally face to face with her, fixated on the impressive size and length and...

With two arms Mark gently grabbed her wrists and peeled away her hands from her chest, freeing her breasts, letting them drop gently to rest. He used another hand to tilt her chin up to meet his eyes. When her breasts were finally free his hands went to them, one hand struggled to contain each, and one hand went to her waist. Everywhere his hands made contact sent shocks through her body, heat continued to wash over her, bathing her in ecstasy.

He said nothing, instead he leaned his head down to her and they locked lips. She forgot Sarah was there, she forgot about her husband or her trepidations that night. She forgot that it was her son in this foreign alien body that she was in contact with. Lianna melted into him, their tongues instinctually exploring one another. Mark brought his body closer, drew his hand from her hips to place it on the upper part of her back thigh and brought their bodies closer together. She felt his penis - both of them - plant themselves hard against her stomach, the upper one making way for the lower head to protrude closer as their bodies met.

They stood, locked, for what felt like hours, even days. Her hands found his chest, his hands worked her breasts and her thighs. She wanted to stay there forever in his embrace, the heat within her turned to a warmth, like a belonging.

With four arms Mark managed to explore every inch of his mother's body, her smooth skin. He kept two paws on his mother's breast at all times, kneading, groping, pinching each nipple in neat twists. His other pair of hands worked their way from her hips and found her ass. Lianna wasn't as ample as Sarah was in the ass department, but wasn't lacking either. Mark's hands worked to pull down Lianna's pants, Sarah moved in to help strip her of her clothes, pulling them down to Lianna's ankles.

Mark now had full, unabated access to his mother's body, and he made full use of it. They stayed locked in embrace, but his hands moved all over her. Lianna couldn't remember a time when her husband had touched her like this, a time when he explored her body like his son was now.

Sarah interrupted their make-out session to ask: "Mom, you mind if Mark sits on the couch?"

Without an answer she moved her mom out of the way, gently, and grabbed one of Mark's hands, leading him to the couch. Lianna noticed how most part of his body dwarfed theirs. Sarah's hand was nearly half his size.

There Sarah stopped and pushed his down to the couch. He was now there before both of them, dicks at full mast, his mother standing with just her panties on in front of him, his sister still fully clothed.

"Mom. What kind of things would we do for the man of the house? I always thought that it was right that he should be able to sit back every-once in-a-while and enjoy himself while we do some of the work, right?" She grabbed Lianna's arm and guided her closer to her brother, pulled her down to the floor, and came down to her knees next to her. She lifted her shirt off, exposing herself underneath, and put her hands on Mark's leg.

"I noticed you didn't touch either of Mark's dicks mom. You can you know, they're really impressive, nearly nine inches each." Sarah grabbed Mark's lower dick as she talked, holding with two fingers, showing off the head to his mother. She used a finger from the other hand to trace the ridges on the top. "They're even better than a normal man's, these ridges here are made for a woman's clit and her g-spot."

Mark wanted nothing more to cum right there and then. He could feel both dicks ready to burst at the seams from the lewd display his sister was treating him to, displaying his new body to his mother, bragging about the size and form of his new penis. His mother had her hands on his legs, inches away from his cocks. Her breasts were just in contact with his leg. He never could've imagined such a perfect woman kneeling in front of him like this, ready to treat him like a king in the house his father had paid for.

Mark could tell Lianna needed more encouragement. He brought a hand to rest on hers, and another to her chin. He once again lifted her gaze to meet his. She had warm eyes, ones you could get lost in. He moved her hand to the upper most penis, her hand gripped it immediately.

She began tracing her hand along it, much like Sarah had. She moved along the ridges, to the base above where it met his stomach. She moved her hand further down, feeling the space where both dicks came together and felt the top of his lower dick as well. She brought her hand up the underside and to the head where she brought her hand in a grip around the shaft just short of the head.

It was a bulbous, alien head. From Lianna's point of view she was staring directly at it. It had small bumps and ridges on the head too, and a prominent crown along the top. She had to remind herself to keep her mouth closed, as it was open in shock and awe.

Now that her mother was moving forward with Mark's help, Sarah moved her mouth to the lower shaft. She started with a smooth lick from base to tip, then brought the head into her mouth, sucking once hard, caving in her cheeks and letting the whole thing come out with a satisfying >pop<. She gave her mother a nonchalant look and took the head in again, working it with her lips and her tongue underneath.

Lianna couldn't believe what she was seeing. It was one thing to be here in front of an alien man, her daughter stripped down to her shorts, herself stripped down naked to her underwear. It felt like another thing entirely to see her daughter servicing that same alien man in a way that no mother should see her daughter.

But Sarah was good at it. She was moving along Mark's body like a pornstar, moving her head between long and short strokes, keep a hand on his leg for support and using another to cup his balls from underneath. Lianna hadn't worked a man like that, much less her husband, for the better part of a decade.

When Lianna paused there, taking stock, she could still feel the heat and electricity rise in her body, begging her to push herself further. While she would've normally run away when Mark and Sarah started their performance, she wanted nothing more now than to take this to its inevitable conclusion.

So, she did.

At first, she moved herself closer to Mark's dicks, closer to where her daughter was now diligently working. Sarah's eyes were closed now, hard in focus on her task. Lianna looked once more at her son. Her lips were only centimeters away from the head of his uppermost cock now, he was watching her expectingly, as if begging her to continue.

She tilted the head and shaft upward and to the side with her hand, giving her ample space away from Sarah, and moved in all the way to give the underside of the head a simple kiss. When her lips made contact she could feel static move across her skin in ripples, her cheeks flush with warmth. She closed her eyes and kissed it again, opening her kiss wider and welcoming more his skin to meet her mouth. She continued to lean in further and moved down the shaft each time she gave it a kiss. She could hear a soft groan coming from Mark's new alien mouth. She could only imagine the pleasure that could be gained by a body with two dicks and two women to work them.

The pleasure and the sight was amazing for Mark. Here he was, in his family living room, his dad away on a business trip, his brother out of town. The only people around were the two hottest women in his life, and they were his for the taking. His mother worked somewhat cautiously on one of his shafts while his sister spared no energy on the other. They both had their tops off and Mark had a wonderful view of the tops of both of their heads, their faces, and their backs. His lower hands caressed both their cheeks, his upper hands heaved themselves to the top of the couch, outstretched like the ruler of the house he was. Neither of the girls met his gaze, both too preoccupied with their separate, but equally important missions.

As far as either girl was concerned, the other didn't exist. Despite their hands and mouths coming so close to each other, they were at wildly different tasks.

Sarah, for one, was hard at work in a silent contest against her mom. She knew Mark was enamored with the woman, but Sarah was his first in this new saga of his life. She had been the one to push him to pursue the new relationship, and she felt a gentle mix of excitement and regret at having to share that with her mother.

Lianna, on the other side, was entering into a new stage of her life, one that was defined by normalcy, and one that was on the other side of seeing her son transform into a lewd alien body that desired to fuck his mother and his sister. She was approaching the task at hand with slight hesitation, pushed on by her body's unnatural desire to mate with this new body.

Lianna worked her way down his shaft and then back up. For her, giving her husband - a man - head was a deeply personal act. It was a way you showed you cared about their pleasure. It wasn't a personal contest or a time to work quick and hard. She kissed up and down, feeling the ridges and the head in her hand. When she was ready, she looked up to her son's new eyes, stayed there for half a second, and brought the tip into her mouth for the first time.

It was a perfect fit in her mouth. She worked over it with her tongue and her lips, feeling the sharp rise of the crown with her teeth, feeling the ridges beyond that. She was hard at work making Mark's new cock feel appreciated, leaving it wet with saliva in the wake of her lips.

She opened an eye to inspect Sarah's progress and saw that she eyed her mom back. Sarah managed a smirk even with Mark's lowest cock halfway into her throat. She threw her head back off his cock and a trail of saliva followed back along with it. Sarah's hair covered her face and she used a free hand to wave it from her eyes.

~I can't let a younger girl get the best of me right now. Lianna thought to herself, she let her mouth off Mark's body. If it was a competition Sarah wanted, it was a competition she was going to get. Her sex life with her husband may have stagnated in the past few years, but Lianna wasn't an amateur either.

Lianna took the base of the cock and brought her tits further up Mark's legs. She stared him in the eyes, made sure her returned her gaze, and dropped her head to the base of her chosen dick. Lianna let her tongue out and ran it along the shaft. When she arrived to the head she took it in and sucked hard, her cheeks caving.

It was everything Mark wanted and more. His mother seemed the flip a switch, going from tepid to a woman with a mission. She made swirling motions with her head, rotating up and down the first few inches of his dick. Sarah watched her mother's performance from behind his other cock. She was silent, moving her lips every few seconds on him, but captivated in Lianna's performance otherwise.

He wondered, did Lianna ever do this for his father? If they were like any other married couple he had ever heard of, they likely hadn't got up to anything quite like this in years. And how big could his dad possibly be anyways? In his human body Mark was only really above average, so his dad was likely more of the same.

Lianna began to put more and more effort onto her performance on Mark's cock. Her hair was everywhere, her tits were jammed into his leg. It didn't matter, nothing mattered more to her in that moment than giving her son the love she thought him and his new body deserved. She began to take more of his length in with each bob of her head, feeling the ridges of his dick on her upper lip and nearly all the way to her nose.

The cumulation of spit and droll in her mouth started to become unmanageable. It was everywhere on Mark's grey alien skin, it was beginning to build up at the back of her throat and up to her nose. She figured she had a few more seconds before it would come out of her nose and spill over from her mouth, which might not be the most desirable sight. She took a last deep breath in through her nose and pushed the head back - past her tongue, past her tonsils, into her throat. She felt as if it was in her stomach, her nose met Marks public region, her chin met the base of Mark's lower shaft.

It took everything Mark had inside him not to cum there and then. He could feel his mother's throat squeezing his cock, his ridges felt every little groove and contraction in her mouth. The view was also amazing - his sister watching as his mother's eyes watered, spit began to bubble between her mouth and Mark's skin. When she finally let off his dick, her mouth and him were connected by a string of spit and saliva. The view of a woman still connected to his privates by spit was quickly becoming one of his favorites.

Mark knew that he was still close to finishing, even with dick out of his mom's throat. He decided that he would have to take matters into his own hands and start directing the action if he was going to get the most out of the day.

Mark leaned forward. Sarah was still on her knees, giving his lower dick the occasional kiss. She had stopped to watch their mother, but now observed Mark as he began to move. Careful not to disturb her, he held her head still with one hand, placed two hands on Lianna's waist, and lifted her up off the floor and onto his lap on the couch. His upper dick now sat between them. The only thing that sat between him and his mother fucking was a thin layer of black panties. Sarah moved between Mark's legs and continued to work him there, alternating between sucking on the head of his dick, and planting kisses along the base of the shaft.

Lianna stared into the strange alien eyes before her. They were mostly black with nearly no hint of pupil. If it wasn't for the small bits of white at the edge, she wouldn't have known where the eyes were looking. At this moment, they were looking right at her own eyes. After a moment of silent contemplation, Lianna broke the silence.

"I'm... not... trying to be unfaithful to your father. I love him."

"I know mom." Mark replied. "This body, I just can't control myself when I'm in it. Do you feel the electricity? The literal spark between us? It's the same with Sarah and I."

Lianna could of course, feel the spark. It was all mostly directed at her pelvis, her inner thighs, and most importantly, her clit and her vagina. The ridges of Mark's top-most member were dragging across her clit as they spoke, or maybe it was Lianna's own hips that were doing the movement.

Before she could give a formal answer, he leaned in and kissed her again. It was a hard kiss, a longing kiss, a kiss you might give to a lover you hadn't seen in forever. His tongue pushed aggressively into her mouth, feeling her own tongue, her cheeks, her teeth. She almost didn't feel his hands grabbing at her beneath them. It was strange to feel so many alien hands at once. One gripped her left cheek, pulling it hard away from center. The other stabilized her hip. The third found a side of her panties, and the final hand pulled the bottom of the undergarment away from her pussy and across her ass.

Part of Lianna knew she had to fight back against this overture, find some kind of meaning in the situation, a way to pull away and go back to a normal life. She thought of her husband, Sarah and Mark's own father. How would he feel, what would he say if he stumbled upon the lewd situation at play? Would he feel betrayed, would he be angry?

All that emotion spun through Lianna, but instead of fighting back against Mark's advance, she lifted herself off his lap, giving him the little bit more distance he needed to position himself under her. He maneuvered his hips until she was hovering over the tip of penis, and with their mouths still locked and his hands still gripping tight on her ass, she lowered herself down.

She felt his head part the lips of her vagina and push further in the lower she went. Mark felt the walls of her pussy grip him, the ridges rubbing her g-spot the further he went in. Weeks of growing accustomed to and using the body had allowed him a feeling of control and sensation he thought it would be tough to describe to a normal human. It was like the feeling of your tongue in your own mouth, the way he could feel each imperfection his skin of his shaft made contact with inside Lianna.

For her, he filled her absolutely wonderfully. His father wasn't nearly as large, almost less than half so, but Mark's new cock filled her quickly and perfectly. She figured she owed it to the new alien heat and static that had been working her body for the past few hours. Mark pushed her hips further down until Lianna's ass was making full contact with his legs. He was so deep that he figured he must've been intruding near Lianna's uterus by now and probably wasn't far off. Lianna lost her concentration in their kiss and leaned forward further, breasts heaving into Mark's chest, her head falling to the side of his neck. Her first orgasm hit her there.

Mark sat, dumbstruck as his own mother's legs shook, her muscles vibrating along his pelvis. She seemed to hold her breath for what felt like forever until letting it out in a mix of moan and gasp. She caught deep breaths as she sat on him, her vagina contracted and squeezed his penis, bringing him closer to what might be his own orgasm. He fought again to quell the feeling, to continue as they were.

Lianna didn't rest long from her first orgasm. Without a work to Mark, head still hidden to his side, she began to work her hips again, beginning in small circles at first. She was grinding on Mark, causing their skin to begin to irritate and rub where they made contact. Mark didn't mind; the two women of his dreams could cause as much irritation as they liked.

And for a minute Mark forgot that his mother and him were indeed joined by her daughter, his sister Sarah. He was become so lost in his mother that he forgot he had other guests he likely needed to pay more attention to. Still, Sarah didn't seem to be peeved by the situation. Instead, she had stopped and observed his mother with the same intensity he had.

"Did mom just cum, that quickly?" She asked pointedly towards Mark.

"I think she did." Mark replied. He turned his head as much as he could, tried to meet her gaze to no avail. She was lost in her own world, grinding and bring her ass off his legs, and then back on.

"I don't see any reason I can't cum too." Sarah replied. She turned, touched her toes, and removed her shorts and her panties in one smooth motion.

Mark had given it some thought, but he hadn't really thought of all the implications, benefits, privileges, or complications of having a body with two dicks. Before this, he had only really had time to enjoy using the body with his sister and on his own. Even then the body was incredible, and two functioning dicks doubled the way you could pleasure one woman at a time. He had pondered, but never truly considered the way that having two dicks could let two women pleasure you as equally.

See, it made sense that two women could still give you head. In fact, two dicks explicitly called for it. You could lay back and let them do the work, feel the pleasure and keep yourself still. Mark had never really considered being able to, and how you would fuck two women at once with the dicks. What if they both wanted different strokes at the same time and you couldn't accommodate them?

Sarah was as nude now as his mother, and Mark had no more time to contemplate. She found his knees with her hands, reversed herself so she faced away from Mark and his mother, and planted herself on Mark's lower dick.

Luckily, Mark was still able to keep himself seated and was able to enjoy both women fucking themselves against his body.

For Sarah's part, she began with a mid-tempo, normal stroke against him. She was pushing herself down fairly standard at first, then began a harder stroke, something more frequent. Mark could see her working, her ass slapping against his mother's, against his legs as she did so.

His mother on the other hand kept her own pace. It was slow and methodical and Mark could tell she was taking her time, letting them explore each other's insides at a slow click.

If there were any other observers in the Thompson household, it would've been an incredible sight. The mother, the matron of the Thompson family, was cheating on her own husband in an incestuous relationship with her youngest son and her only daughter. They wouldn't have been able to tell much about Mark, but would be able to tell about the large, grey alien with two dicks and two women working him like he was Great Khan himself.

For a time, Mark let both girls work. They said nothing, his hands did nothing to guide them. He could tell them both were focused on their own pleasure, and he felt as if it was well earned. He wondered how often sex was for their own enjoyment, or if it was more often for their own partners. He figured he could give them all the time they needed, and for a while, he did.

He could tell Sarah wasn't as close to climax as his mother had been, his mother he also felt fall into a deeper rhythm. He figured he was fine to take control again.

With a hand he pushed Sarah gently off his body, her pussy gripped his cock until the last second. He grabbed both his mother's hips and effortlessly rose to his feet, keeping a hand on her butt and another on her back. Keeping himself inside her, he grabbed Sarah and pulled her to the couch. "Lay on your back." He instructed her.

Sarah did as she was told, staring into Mark's eyes she laid herself back on the couch longways, biting her lip in anticipation of his plan. He grabbed his mother and gently laid her onto the top of his sister, lining up both their pelvis for what was to come next. He gave them no chance to protest and lowered his body on top of theirs. He figured if he had gone as far as he had with them both before, they wouldn't mind laying on top of each other for at least a few minutes.

When he found no protest from either, he used two hands to hold himself up and two more to line the heads of both his penis with their bodies. He had to use his mother's ass to make the maneuver work and gave it a generous heap of spit to help lube his hand and her ass. She whimpered lightly as he stuck a meaty finger in.

Then, with both dicks lined up, he pushed.

Sarah could feel her mother's body tense up above her. She wasn't so heavy that she was causing Sarah pain, but she could feel every move that she made. Lianna's ass was tensed when her brother began to push.

Mark felt both women take him in. His mother's ass was tight, but with some extra spit and some time pushing, he managed to get a hold in both holes. He was inches deep and no longer needed his hand to guide himself. Whatever this alien body did to these women, it made it incredibly easy to fuck both of them, no matter the circumstance.

Mark began a solid stroke at first. A medium pace that allowed him to feel each part of them. He used one hand to keep himself stable against the couch and another to grab various body parts of both girls beneath them. In the building pleasure it was hard to know which body he held in each hand.

His mother beneath him said nothing. Her eyes were closed, Mark focused on the swaying motion her breasts made with each of his pumps, with each push of his pelvis.

Her breasts really were amazing. You could tell that she hadn't gotten work done with the way they splayed there on her back, one to each side. It was a suspicion he had always secretly held, and he now saw it confirmed firsthand.

Mark lowered his head, ignoring his mother with her eyes closed, and brought his lips to Sarah's mouth. They locked tight and his pace increased. He brought his hips closers to theirs with each pump, each push, each motion. Inches and inches of shaft pushed and withdrew itself each second, alien ridges running each bump on the skin of both girls beneath him. He could feel his own orgasm building now, coming to an eventual crescendo. Sarah's own legs began to shake like her mother's. Mark could only hope she was as close to orgasm as him.

He let his pace increase naturally until he could feel the whole couch rock beneath them. He drew his head up now further to focus, one hand holding his mother's ankle in the air, another on his sister's waist below her. His hips began to meet skin now, his thrusts became shorter. He was sinking nearly 8 inches each into both women.

He felt the orgasm build and there was now no hope in holding it back. He continued his stroke until he could feel it build and then sank himself completely into both women.

Sarah and Lianna both felt the dick that was assigned to them pulse as it began to let out Mark's alien semen. Mark held inside them for a moment, he could feel himself releasing more cum than he had in times previous.

When he finally pulled himself free of both women both dicks were both still letting out a grayish mix of cum. They were thick ropes that had incredible density and volume. As he withdrew he had left several thick ropes on the couch (he could already tell he'd be cleaning that later), he brought his hips forward again and sent several more ropes onto his mother's stomach that overflowed onto Sarah and more couch cushions. Mark held himself propped by his arms, still holding his sister and his mother and the couch, twin dicks resting now in his own puddle of alien goo on his mother's toned stomach.

The three members of the Thompson family stayed there for a while, resting in their puddle of sex. Sarah and Lianna both oozed cum from where Mark had once occupied them. Mark's large alien body stood over those of Lianna and Sarah's - a conqueror who had climbed the tallest hill of his family conquest and lived to tell the tail.

Lianna had gone straight to bed after they had finished that night. Mark had cuddled her and Sarah wordlessly for what must've ben fifteen minutes. Lianna had then stood up without a word, started a shower in her and his father's room, and went to bed shortly after. Mark carried a tired and drunk Sarah back to her bed and stayed up to get what he could off the couch. He wasn't very successful, and he could tell it would be a long and stressful few days trying to get what he could of his alien grey cum off the fabric.

########## The Next Morning ##########

Mark knelt in front of the couch, sun shining through the shades of the house. The couch had a thick white stain on it from the night before. He had been selecting a mix of cleaners to use before his sister awoke and handed him something she had known would work well, and a bleach they might use to sterilize the couch. So far, it had only really served to dilute the color of the stain and make it larger, not really get rid of it.

"I don't know how we're going to get this thing clean before mom comes homes. I've been at it for the better part of an hour today and it barely looks any better than it did this morning." Mark spoke to his sister.

Sarah stood in a pair of pajama pants and her bra, tanned stomach and breasts were magnificent in the morning light. She stood, drinking her coffee, examining the situation with the couch. "You could just flip the cushion over." She noted.

"And if we flip it over? It's still going to smell like cum you idiot."

"Well then that's what the bleach is for! And maybe if you want a clean couch you should focus on where you cum next time, idiot."

Mark sprayed another small spritz of bleach and smelled the couch. It didn't smell as bad, but was still obviously covered in cum. He considered he might just be fucked.

"Do you know where moms at? I hate to be a useless boy, but she might have a good idea of what to do here."

"I checked her location." Sarah blew on her coffee, took a long sip. "I think she went to yoga early this morning, then a nail appointment or something. I'm not sure when she'll be home."

"Do you think she's upset? She went to bed straight after we were done last night, I haven't seen her again this morning."

"She's probably a little upset. I mean, the whole situation is pretty fucked. She cheated on her husband with her daughter and her son. I would be surprised if she wasn't feeling conflicted." Sarah set her coffee down for a moment, folded her arms. "I bet she just wanted to get out of the house this morning to think it all over. She won't be gone forever."

"You're right." Mark conceded. "I just hope we didn't come off too strong too quick."

"We came off very strong, I think. But even with coming off strong, there's a part of my body that couldn't resist the alien bodies. I bet mom felt something similar." Sarah turned her head and looked out the window as she pondered. "I wonder if any woman would feel that same feeling."

########## Mom Returns ##########

Lianna spent most the day out of the house. Mark and Sarah gave up checking her location around one in the afternoon. She had gone to the gym, got her nails done, then likely shopped until her legs hurt. It was painful for the two siblings to wait and be held in suspense for her return. They both channeled their collective guilt into deep cleaning the house, getting it ready for their mother's return.

She arrived, roughly four pm. Mark and Sarah both sat by the pool, taking in the afternoon sun. Lianna unloaded her bags, set down a diet coke on the kitchen counter, took stock of the house. The kids knew she was home, it seemed like an excruciating amount of time before she decided to come out to the pool. When she did, she took a seat away from Mark, next to Sarah and spoke.

"I don't know what happened last night. I'm loyal to my husband, to your father. What happened last night was abhorrent and never should have started." She began. Mark's heart dropped in his stomach. It seemed as if there was a chance of something more when they came together in the living room last night, and now those dreams were dashed.

But Lianna continued: "I don't know what happened, but I know I wanted it to happen. I could feel it inside my entire body. I love your father, but... Mark I know I need to see more."

Mark's heart jumped back to its original position. It seemed like this would continue further.

"What do you want to see?" He asked her.

"I want to see that body, the one with the four arms. Did you have more bodies?" Lianna inquired.

"I have two others." Mark cleared his throat. "One has an un, impressive package." Saying it out loud to anyone other than his sister made it sound so ridiculous. "And another that's got, a lot of dick, I guess that's a good way to describe it."

"More than two?" Lianna asked in an exasperated voice.

"It's, a little difficult to explain. It's like, a bunch of arms and I can uh, use them to pleasure women."

"That's one way of putting it." Sarah noted from behind her sunglasses.

"I want to see them, all of it, but on my terms. I liked last night but, I want to take it slow. Maybe we can have a special dinner, just you and me? I might need some more wine before we, do anything." Lianna blushed.

"Absolutely mom." Mark did his best to put on a reassuring and confident voice. He was filled with excitement and lust for her, but didn't want to push too hard now that he had another chance. "Sorry Sarah, hope you're not too offended."

"Not at all, I need to get out of the house anyways, lead a normal life for once. I'll see if any of my girls are going out." Sarah replied casually.

########## dinner date #########

His mother was true to her word and prepared a special dinner for just the two of them. She had Mark clean the house a little more, had him try some baking soda to help the cum stains on the couch they had created. While they were getting ready for a mother-son date, his sister was getting dressed and ready to pre-game the bars with her friends. Mark was contemplating getting a fake ID for himself a few weeks ago, but he felt he had plenty of diversions he would be happy with now.

Lianna was one such diversion. She wore a thin white sweater this evening while she prepped dinner, it buttoned down the middle, long sleeves on each arm. It showed a fair amount of cleavage, something that showed her chest off, and gave you plenty to think about. She was dressed modest now, but in a way that said: "I could be showing a lot more, be thankful that I'm not." Mark could have only imagined how easy it was for his mom to drive men crazy before she met his father.

And Mark was now able to do more than just sneak a look or two while she was preparing dinner. He watched her move back and forth, cutting up a steak she had grilled on the stovetop for him, tossing a salad on the counter. Each movement brought bounce, to her body, her hair. He had never studied her this much before, been able to really examine her - her eyes, her dimples, the way her hair moved in front of her face when it wasn't tied up behind her head. Every minute or so he would catch Lianna's eye as she moved in front of the kitchen counter, she would blush and divert her attention elsewhere when they caught each other staring. It was like being at a new crushes' house being prepared a meal.

When the dinner was about complete, Sarah strolled into the living room ready for her own night. She was wearing a crop top and a skirt, stockings on underneath. It was something of a staple for her as it showed her legs and her ass off well. Mark figured he must be in heaven, getting to open ogle both his own mother and his sister, both beautiful and stunning in their own ways. It felt like being able to have your cake and eat it.

"I'm off to the bars. Do you think either of you will be able to come pick me up from the bars tonight?"

Mark looked down at the ground momentarily, Lianna looked at Sarah and bit her lip. How would Mark be able to phrase that he was hoping to be inside his mother or asleep next to her at all points during the night, not in a car driving to pick his sister up from the clubs?

When they both offered no immediate response, Sarah took the hint. She sarcastically rolled her eyes, "Fine, I understand you'll both have a busy night. I'll either stay out or take a ride back." She moved towards the door and grabbed her keys from her clutch. "Don't have too much fun you too!" Before she opened the door and exited the house she offered one more yell: "Remember to wear a condom you two crazy kids!"

Mark and Lianna both looked towards the floor, cheeks beet red. He figured that a comment like that should make them both feel ashamed, even if that's not how Sarah intended it. Instead, he felt giddy. He felt the way you would if a friend made a joke about sex in front of a crush you had been around forever, and you could feel that you were closer than ever to making that crush a reality.

When dinner was ready Lianna had him prepare the table, get the wine glasses ready. She had the plates set out for him to bring out and went to grab a bottle of wine. Every time they brushed or came close in the kitchen he could feel the static build between them. It felt like the air was saturated with it now. He figured that if the static could take an even more physical form it would've fogged the kitchen over by now.

Then they sat at the dinner table, her across from him. After weeks of lusting over her there she was. It was no longer sneaking looks and examining her from across the kitchen. She was served in front of him, on a metaphorical plate, at a dinner she had created herself.

It was difficult to meet his mother's gaze, at first. Mark nearly downed half his glass of wine in the first few minutes of sitting down, he had to stop himself from finishing the glass too early, looking too nervous. When he set his glass down her could tell that she knew how nervous he was, she caught his eye for a moment, he averted his gaze to his food. He could feel her eyes on him for a moment longer before she started cutting into her own food.

It felt like they had both been silent for too long after sitting. Mark spoke first.

"The food is amazing mom."

"You like it?"

"I do." Mark brought his eyes up to meet hers.

He studied her face for a half moment. Her cheeks were blushed with a hint of red, no freckles in sight. She kept her makeup simple for dinner, but he could tell she put effort in. She wore her hair down, natural. It swept in from of her face constantly and drove him wild. Something within found the words to carry on a conversation.

"Mom I, really appreciate you not treating me, Sarah too, like a freak about all this. I know it's weird." He spit out.

"Honey, let's just enjoy a little date for now. Let's talk about business later, what do you say?" She proposed to him.

"That is fine with me." Mark responded.

"So, college, community college. I'm not pressuring you at all, just want to know what you're thinking. You've been working your way up at the gym, do you think you want to be there for much longer?"

"I've actually already applied to community college. I've been a little distracted lately with uh, everything going on, but I want to do community college for two and then go to UC Boulder." Mark finished chewing on his steak, swallowed it fully. "Or at least that's the plan."

"I think it's a great plan. You get to stay close to home for a while longer, live in, then go and get a degree just the same as everybody else."

It was off-putting, nice, normal, and incredibly erotic to be having normal conversations all while thinking about the night's inevitable conclusion. Mark was incredibly hard underneath the table.

They drank more wine, ate more of the wonderful dinner Lianna had prepared.

Eventually they finished dinner and retired to the couch. Lianna had two glasses of wine at dinner, so Mark did too. Lianna had another glass as they sat down and turned on a movie, so Mark had another glass himself. He didn't feel drunk, but tipsy enough he was forgetting about proper social etiquette. Lianna felt the same.

At first, they sat apart from each other on the main sofa. Close, but not close enough to touch. Mark made a move first, moving closer to his mother and putting his arm up and over the head of the couch. Lianna decided to lean in, head resting against his chest. Mark decided he'd try and take it to the next step.

"Mom... do you me to change into my new body, do you want to..."

Lianna cut him off. "Let's go to my bedroom honey, we can do that there instead."

She rose and grabbed his hand, led him up the stairs to her and his father's room. He had an amazing view of her legs as they walked. Lianna wasn't built like Sarah when it came to the size and shape of her ass, but she didn't need to compete. To Mark she was in a league all of her own.

When they arrived at the door to their room, Mark quickly felt a pang of regret and guilt over his father. Here he was, an interloper in their marriage, being taken to the most sacred spot of his mother and father's relationship.

"Wait here." She told him, motioning to the bed. "I want to change into something of my own for you, just sit and hang on, ok?"

He did as he was told.

It was one of the first time he had really taken in his parent's room. It was a nice master bedroom, a king-sized bed. Off where his mom had went was the shower, which he was familiar with already, and the master closet and bath. Lianna and Brian had decorated their room well, painted it, stocked it with family pictures and decorations. His father stared at him, knowingly, from several portraits of the couple on several walls. It wasn't helping Mark feel any less guilty.

Then his mom stepped out of the door to the master bath.

She was wearing white lingerie. A garter belt, matching lace panties and a bra. Her brunette hair was let down over her face. She was the most beautiful thing Mark had ever seen.

Her chest was on full display for him. They sat wonderfully. Her skin had a pale complexion like cream and the shape of both was wonderful. He could see through the lace, her nipples the perfect size and proportion.

"I don't get to wear this all the time. Your father gave me these for the wedding, but I haven't worn them in years. Do you think I still fit them well?" She asked him.

Mark offered no response but to let stare openly with his jaw agape. Lianna took the gesture for what it was and let herself blush, further contrasting the white set with her skin.

"I figure since we're going to do this, it's only right that I show you something as well." Lianna took a seat next to him, crossed her legs on the bed. "You can touch me if you want."

He used his hand closest to her and laid a hand on her back. Lianna's skin rose with shivers as he did so, the heat and electricity seemed to reside for the first part of the day but was quickly rising in her once again. His touch reignited her.

His other hand went to her stomach first. He felt the definition and tone of her lower stomach, his hand played and danced higher around her garter belt, felt the stitching on the lace. His hand quickly rose, until he laid a hand directly on her breasts.

He felt one first, then the other. His hand went back and forth between them, squeezing here, lifting there. Her skin was illogically smooth, she felt like ice cream tasted.

When his hands had had enough, Mark looked Lianna in the eyes and lowered his head to her chest. His lips met the top of her breasts near her cleavage. He gave her an open mouth kiss there, then traced his tongue further down her cleavage, stopping where it met the lace of her bra.

Lianna's head was back, her eyes looked to the ceiling. She had felt guilty earlier, when she led him upstairs, but his touch was like magic, each patch of skin he touched felt like a shock and heat all at once. Her legs were quickly becoming a furnace and jelly at the same time, sinking her further into the bed with him.

"Mom we... I should change for you now. I want to show you what else my body can do. Is that ok with you?" He asked her.

"Please," was all she could respond with.

With Sarah these things were different. Since day one of showing her his bodies they had become fuck buddies almost instantly. They had used each other in ways that he had only ever seen in porn before. With his mother he wanted to do things differently. At least at first.

Mark stood at the foot of the bed and raised his arm. "When I use the watch I have a few different options. You've already seen the first body I used, I think it's appropriate that I show you the second."

In one swift motion Mark raised his watch hand and his opposite hand found an inlet on his watch that sparkled bright yellow. He pushed the inlet deeper and a white light washed over his body. His form shifted, bringing him into a smaller shape than the one he just occupied.

When the light subsided, Lianna opened her eyes. In front of her was a man of stature much shorter than she expected, based on previous experience.

He had to have been five feet tall, maybe less. He built much skinnier than Mark, but had noticeable muscles in his legs and his arms. Lianna would've mistaken him for a dwarf had he been any thicker around the waist.

Mark was evidently prepared for her observations. Lianna said nothing, slightly dumbfounded at the juxtaposition of his four-armed body and this.

"I know this one might seem a little weird at first, but it's not the height of the body that makes this one so special, I promise." He assured her.

With that statement, he loosened and took off his shirt. When he went for his pants, Lianna caught a clue of what might make this body special compared to the other.

Before he had even removed his pants she could see a bulge outlined on his right leg, underneath his trousers. It looked like a third leg was hidden there.

He removed his pants, stepped out of each leg, and Lianna was able to confirm what she had saw. His penis, if you could call something this size that, was like a porn drawing. It was nearly as long as his leg even as soft as it may have looked. It pulsed with each breath he took, moving like it had a life of its own.

The head was even more alien than those of the two-armed body. It was uncut, as thick as her fist, bright pink, and had spikes around the crown of the head.

The shaft was equally alien. Bumps and ridges ran along the length; veins that rivaled a normal man's size did the same. It grew thicker in the middle until coming to a funnel at Marks new waist. And his balls had equal size, each nearly an orange around in circumference. She wondered how his new body was able to fit into any pants at all.

"It's a little uh, large I know." He spoke, his voice accentuated in a new, alien tone. "Sorry it's uh, a bit much." One of his hands scratched his head in apparent embarrassment as he said so, his dick twitched and moved with every movement he made.

Lianna moved off the bed and to her knees to be in front of him. Her body was driving her towards this penis. She forgot all withholding about the height and stature of his new body, her only concern now was inspecting the new manhood of her son's body. Mark's new penis rose almost instinctually to greet her. It wasn't standing at attention now, but the head was nearly to the same level of her breasts, pulsing and hardening with each moment.

The head was already leaking pre-cum. It was a shiny, oily substance that beaded up from the eye of the head. Lianna reached up with a finger and touched it briefly, her fingers became slick with the substance. She brought her fingers to her nose to smell it, then brought it to her tongue to taste it. It smelled and tasted sweeter than cum normally tasted, like honey mixed with semen.

Mark groaned from his new body. "Oh fuck." He managed to mutter.

Sarah put a reassuring hand on one of his new, short legs and brought herself closer to him. The dick was practically on her shoulder now, her head closer to the shaft than to the head. Mark looked down. His mother, the woman who had raised him, was a breath away from the base of his alien penis, wearing things only her husband should see her wear. Her breasts were perfectly on display for him there, held perfectly by the lace of her lingerie set.

"I figure, would it be ok if I, put my mouth on it?" She asked him, knowing the expected answer.

"Yes." Mark quickly responded. "Please." He wanted nothing more.

With that, she planted a kiss on his pelvis, next to the base of the shaft. Her lips rose and she planted another closer, closing the distance. Her third brought her lips to the base. He had a slight hint of hair down here on his pubic region where her lips made contact again.

Another kiss found its way onto the lowest part of Mark's shaft. Lianna's lips found a vein that ran along the side towards the end of the penis, something she would trace with her mouth. She left her lips on seconds more with each place she planted them, savoring each time she did so.

Deep down, in every body part, Lianna ached for her son to take her with this monstrosity, this THING. Half of her wanted to be turned inside out by this cock, and half of her wanted to help her baby boy savor each and every moment she could make him feel exceptional. She decided she would have to wait, have to make the moment last.

Lianna gripped the penis from the side with her off hand, planted another kiss, this time halfway up the shaft. It continued to pulsate, requiring what she could only assume was massive amounts of blood to stay erect. It was a wonder Mark's new body was able to stay upright with all the power the new cock must have needed to consume.

The shaft grew wider where it grew longer, going from a soda can's width at the base to something more like a large shampoo bottle at the middle, then back down towards the tip. Each time she kissed it she could feel the wide side vein pulsing and flowing with alien blood, bringing her closer and closer to the head. It had bumps and ridges in odd places, reminding her how alien it truly was.

Before Mark knew it Lianna had kissed her way to the alien head, the tip of his monster. Lianna gave him a deeper look, kept eye contact as she gave the head a single, gentle, kiss. For its size, it was like Lianna was kissing the cheek of a lover after a date night out before you closed your door on them.

Only she didn't close the door now.

Instead, Lianna gave another, longer kiss that she let linger. Then another. She moved the penis around her head and gave another kiss to the opposite side. She gave it a simple kiss again, then a longer one after. She worked it masterfully, showing not just lust, but love and appreciation. Mark wondered when the last time was that his father ever received this kind of attention.

Lianna looked up at Mark again and asked her new lover: "can I do more than kiss my new lover on the cheek?"

Mark offered no response this time. The shaft in Lianna's hand was now fully erect and rock hard. It must've been nearly a foot and a half long, possibly larger. He simply put his head back and offered a deep exhale in response to her question.

Lianna took that as a "fuck yes" from him.

She put herself staring directly down the barrel and looked up at him again, lowering her mouth down into the tip. She figured she'd struggle to fit the thing fully in her mouth, when she put her lips around it she found she was right.

She didn't mean to, but a thought popped into her head of her husband, what he must be doing right now. If he was away on a work trip then he was likely having drinks with his colleagues at this hour of the night. Typically, he would call her after he was done and on the way to the hotel, but she might have to skip that call today. Would he be upset if he knew what she was doing? If he had secret cameras around the house to record what was happening, would he be more devastated or confused at the events unfolding? Would he, like any man, compare his own penis to that of his son?

She then remembered where she was. Penis. Son.

Lianna gave the top-most gland of the penis a sharp inhale with her mouth, sucking in as much air that still sat there into her lungs. From Mark's angle Lianna's cheeks caved in and her lips suctioned themselves further onto the head. She was only two inches on and her lips barely crept close to the crown of the head.

Penis. Son.

His two new bodies were both well endowed. She figured the two penises of the first body she had encountered the day before made up for the lack of length for the penis she was latched onto now, but this thing easily beat both of them. Not only was it long, it was alien, and strangely, and even though it didn't look like it would fit inside any part of her completely, it was perfect. It was beautiful.

And even at his new height, he was still dominant. He stood over her and watched intently as she worked her lips tightly onto his new dick, savoring the pre-cum that was still leaking heavily from the tip. She found it intense to be watched like that. She had typically asked for the lights off when she was truly intimate with her husband, but she wanted her son now to see her work him in all her glory.

From watching Mark, she could tell that he was not only interested in her but of the view of his own cock as well. He was switching between looking at her and admiring himself, and she couldn't blame him, this dick was beyond impressive.

Mark pressed his hips forward slightly. Lianna took in an extra two inches of his dick. She found it to be no immediate issue, she had been working her way further and further onto it already and his movement just gave her extra momentum. Mark grabbed the top of her head with one of his hands. He pushed again. Lianna shouldn't have been surprised.

After all: son, ridiculously large alien penis.

Both of her hands lurched forward towards his hips, landing her palms firmly on his waist and grabbing each. Mark made another movement forward with his hips and Lianna took more of his head inside her mouth. She was well beyond the tip now, it must've been nearly four or five inches deep. Her view was that of his sizable shaft now, her eyes watered and tears began to find their way from her eyes to her cheeks. She had no idea how, but she had no problem with his size now, as if her jaw had become magically altered to take a dick of Mark's proportion.

Normally Lianna would be more than incensed at the kind of treatment her son was giving to her. She rarely let his father force her head down onto him, blowjobs usually were at the leisurely pace she decided on. Her son however was treating her more like a whore at the moment than his own mother, and everything in in Lianna's body told her to simply accept her place and get more of what she also wanted, which at the moment was the monster lodged tightly within her own mouth.

Lianna gripped Marks hips tighter and tilted her head so she would be able to look him in the eye. With his dick firmly in her mouth if proved difficult, but she wanted to see him while he did this, looking at him while he violated her. Mark continued to pump his hips as she did so.

"You ok mom?" He asked her. It sounded almost reassuring to Lianna, like asking if she was ok after burning herself on the stove. It didn't sound like a question a man would ask a whore drowning in his cock. It only served to remind herself more of the love they had and the bond they shared. She made no response but to pull his hips closer on his next pump to help him drive more cock into her mouth.

How quickly they had went from mouth to throat Lianna wasn't sure, but it eventually happened. As Mark rocked his hips his cock slipped further and further into Lianna's esophagus, pushing her tongue to the floor of her mouth and pushing her lips to their extreme. As the pain of the intrusion increased, so did the fire, the pleasure, the electricity. It didn't take a genius to deduce that all things had an impact on her ability to take an ungodly amount of her son's new body inside her. When Mark began to truly bottom out inside his mother Lianna could still see inches of penis between her mouth and the base of the cock. He stopped his hips and sat there. Her eyes met his.

Mark spoke, his voice soaked with lust: "I'm honestly impressed mom, you took more than Sarah did her first time."

The comparison was a stark reminder to Lianna that Mark was the new man of the house. She resolved to show him that she meant business, that she would be better than his own sister. Just when they both thought they were bottomed out inside each other, Lianna's knuckles grew white around Mark's waist as she pulled his hips closer to her, devouring further inches of his cock inside her throat.

Heat drove in waves through her body. Electricity tingled throughout each limb as Mark's penis delved further and further into Lianna's body, finding space where there was none before. It was nearly to her stomach now, her eyes bulged and watered, she had to close her eyes to keep the tears from flowing as hard as they were. She allowed herself a peak when she got a brief respite from the water pouring from her eyes, and as she opened she was greeted with a plain view of Mark's abdomen before her, skinny, toned, alien. She had taken the whole dick in its entirety, all the way to the base. It was in her stomach now, she was sure of it.

Mark took a second, as difficult as it was to focus, on the view from the top. It was brilliant, and felt even better. His mother beneath him had her lips pressed to the intersection of his pelvis and his cock, spit was bubbling and foam was forming where her lips attempted a seal between her skin and his. Her breasts were pressed hard to his legs, he could feel them squished against his body. From behind he had an even better view. Her white panties, her lace garter belt. Her whole body quivered as she pushed forward with all her might and gripped his sides hard. If he could bottle up this feeling and sell it he would be the richest human on earth.

Lianna reached her limit and felt the grooves of Mark's manhood slide past her lips and through her throat as she lost her grip on his hips. The crown of the head of his penis scraped her throat as it continued it's journey outward, eventually pushing past her lips and falling to a slump in front of her, connected still by a throng of spit and precum. The viscous liquid was thick, not quite like cum, but enough that she tried wiping it from her mouth and only managed to get it on her hand now, much less break the literal physical connection she still shared with her son.

Mark held her head in place as she backed off his new monster. He managed to keep her upright as she swayed gently on her knees. Her eyes were half-open, half-closed, clearly spent by the effort of stuffing something so large into her body.

"You did, fantastic, mom." Mark gave her some reassurance. "I can't believe you took that all the way, it's got to be the greatest thing I've ever seen."

Lianna offered nothing in response, still dazed hard by her efforts.

Mark leaned down to her, not very far thanks to his new body's decreased height, and examined her mouth. She could feel him probing with his gaze, probably examining her mouth and wondering how she could possibly take him down that far. Then, when she didn't expect it, he brought his lips forward and locked them tight with hers, through the saliva and gruel still attached to her face.

When he decided he was done, he pull his head back. The string of spit attached him, her, and his cock for a brief second before disintegrating. Without thinking, Lianna blurted out, "your father never kisses me like that, never after I suck his dick." Lianna had no idea what came over her in telling him this, but regardless, it was true.

"There's a lot I think I can do that dad can't." Mark responded. He still held her head from the top, cupping her head like you would grab an apple from the produce bin at the store. "Here, let's go to the bed." He let go of her head and grabbed her arm, lifting her to her feet. She shuffled backwards until she fell to her back on the bed, glad enough to be off her feet now.

Lianna was displayed on the bed to Mark, hair splayed, breasts heavy and held together neatly by her lingerie. She was a captive to Mark, waiting for him to take her. He waited no time, climbing into the bed on her knees after her, dick in one hand to keep it from dragging on the bed.

Mark dropped down further to his elbows, letting his dick drop to the bed beneath him. It landed against the back of Lianna's thigh, head pushing an indent into her skin where the loops of her lingerie grabbed her skin.

"Does dad spend any time doing things like this for you?" Mark asked as he began to kiss her legs, starting at her knee. "Does dad's dick poke your legs when he does?"

Lianna assumed the questions were rhetorical. Even if she wanted to answer, she couldn't. Each time Mark's new lips met her flesh it set off fireworks inside her. She was buzzing like she had drank more than three glasses of wine, her skin was tingling and numbing and lighting on fire all at once.

"My tongues a bit big in this body too mom, I can't believe I haven't shown it you yet." Mark stuck his tongue out, Lianna could only grab a glimpse of it as she lifted her head up before it made contact with her leg. It was long, maybe four or five inches and slimy. It was almost lubricated with spit, and it came to a point where Mark could control it and drag it across her skin. He used it to trace a path from a point at the top of her thigh directly above her knee to the edges of her lace panties. The menacing tongue poked and prodded her skin, finding its way under her lace panties and edging its way about her pubic region, seemingly stopping when it found its way too close to her pussy. He was teasing and touching her, bringing the fire to uncontrollable levels.

Another thought formed and found its way to her lips before she had a chance to think it through: "Your tongue is bigger than your father's dick."

Mark stopped and pulled his tongue back, sat up on his knees in front of her. His dick was still stuck there on the bed, he let his tongue hang out for effect for a second before bringing it back inside his alien jaw. He responded. "I like it when you talk like that. I like when you talk me up, tell me that I'm better. I want to hear more of it." He brought himself forward now, crawling over her, bring his body up onto hers. "Does dad ever run his tongue over your body?" He asked her, head dipping towards her stomach and his tongue extending once again. Where he ran it over her belly button and her abs it left a trail of wetness.

"He doesn't baby, he doesn't." Lianna replied in a low, husky tone.

Mark brought his tongue up to lick higher and higher, reaching the space just below her breasts. He brought himself higher, his dick dragged between her legs behind him so he reached back and brought it forward with him. It was long enough that he had to bring it up at a side angle, the head and shaft dragged across her stomach leaving waves of electricity to crackle underneath her skin before it came to a rest on her left side. Mark's hands went underneath Lianna to untie her bra and let both of her breasts free. Not more than a second later have felt him take her left breast whole inside his mouth, his tongue swirled around her nipple and wet the skin around it.

"Oh Mark you... I..." Lianna's voice trailed off, her breast was catching fire now, her nipples felt like the trail end of a fire work inside his mouth.

Mark feasted hungrily on his mother's breast. He had dreamed about this moment since he donned the watch and it was now finally paying off. His mouth greedily sucked in as much flesh as he could from Lianna's left breast and lift it high off her chest. He released it then shift his focus on the right. He looked at his mother's face as he brought his mouth down on her nipple, teasing it, flicking it with his tongue. His mother let out a shriek when he brought his teeth down onto it, biting hard enough that it must've caught her off guard and woke her up from her delirium.

"Fuck Mark, not so hard honey." She scolded him softly.

"Sorry mom, I just got excited." He replied back with a soft smile. She could tell that he clearly knew what he was doing and was, in fact, not sorry.

Mark stopped his mouth's conquest of her breasts and stood further up, separating their bodies. He was now towering over her - as much as he could at his new height - and brought his dick up between them. She had the same view as earlier now, staring down the barrel of his two-foot long alien penis, head nestled comfortably between her breasts.

"Do you ever let dad titty-fuck you? Even if he isn't big, I bet it isn't difficult to get anything between your chest mom." He asked her.

"He does.. we do." She replied. "We never make it very long like that, he usually cums pretty early when we do it."

Mark brought himself down to a squat. He had shifted himself back lower towards her hips as he did so. The length of his cock ran now from just above her belly button to the top of her tits. "Well I think I can last long enough to make it count."

From there, Mark slid the monster forward until it poked Lianna in the chin. She turned her cheek as he prodded further, let it run along the side of her face until she could feel the long vein first across her cheek bones, then across her ear. He still managed to keep his hips well above her stomach, his pelvis would have a ways to go until they met the bottom of her breasts.

"I need you to hold them together for me Lianna. I'm a bit too short like this to do it myself, or I would. Matter of fact, I'm going to need you to spit or run your tongue along the underside for me, we're going to need to lubricate more to make this work."

Lianna did as she was told, squeezing her breasts together to hold Mark's cock in place on top of her. She spat once on the dick as it pushed back and forth from her mouth, stuck her tongue out as it pushed by. Lianna had never let Brian talk to her like this, tell her what to do and order her around, but with Mark it was different. Her body practically drove her to listen to him, hang on his every word. It was almost a natural place listening to him tell her what to do.

Mark continued his part, running himself between Lianna's chest. For all the work the new cock did for his mother and sister, it did wonders for himself as well. Using this cock to feel his mother's breasts was even better than using his hands. Each bump, ridge, uneven surface on his shaft caught and felt the flesh on his mother's breast like the tip of a finger. He figured the nerve endings must be crazy in compared to a normal man's dick, maybe doubled or tripled in comparison.

Mark's hips pushed and pulled, dragging the dick between Lianna's chest. She held them up for him, lathered his dick with her mouth as it pushed by. It was heaven.

"Mom, fuck this feels good." Mark spoke, distracted by the intensity, the pleasure of the situation. "You look amazing, shit, uh..." his voice continued to trail off. "We should get a picture of this. Can I use your phone?"

Lianna stopped pushing as hard, closed her mouth. For as far as they have went so far they hadn't left any evidence they couldn't clean up.

"Honey, I, fuck, don't think... ugh.. we should take a picture." Lianna's voice broke with each push from Mark, the motion became more aggressive now, more forceful.

"I'm not going to, huh, send it to anyone. Maybe just Sarah... fuck honey." He argued back, still half focused on physical sensation.

Normally Lianna wouldn't hesitate to use her motherly voice with her children when they argued, when Mark, Sarah, or Danny became unruly. She was typically the strict parent who kept her children in line, but she had obviously crossed that bridge when she put Mark's alien dick down her throat. The risk of taking pictures or videos were still too high of a risk to take, too likely to be caught if they forgot to delete or hide the photos properly.

Mark had ideas of his own.

She had brought her phone up to the room, put it down on the side table when they came up here. Mark lifted himself off her for a brief moment and snagged it from the table. He opened the camera app and was back on her instantaneously, phone in hand and dick resting again on her chest. He pushed it back down again between her tits where it easily slid back into its former place.

Lianna's conscience fought it, told her to get him off of her and put the phone away. If she could get the phone she could lock it properly, tell Mark off. She almost did, but Mark started the motion again with his hips, his dick pushed against her face and forced it back down against the bed. He wasted no motion, no time getting back to his previous stroke, balls resting heavily against her stomach.

He would never be so crazy to actually send something to his father, right? Lianna reassured herself that Mark didn't want to be found out, so to send something would be suicide for him as well as her. He probably only wanted to get a rise out of her, get some pictures of his mother as a conquest. Maybe she could still put a stop to whatever plans he had with the phone, get him off her, lock the phone away...

Lianna realized in the brief time that he had grabbed the phone his plans had changed. The phone wasn't in his hand for a picture, it was in his hand, ringing on speaker phone. He threw her a wink as he showed her the screen, his father's contact information visible for a brief second before the phone went into the call.

"Hi honey! How ya doin?"

Lianna kept silent. Maybe if she could stay quiet and refuse to talk Mark would realize he couldn't hold this over her, wouldn't be able to get her to talk while they performed this despicable act.

"Honey, are you there?" Brian asked again through the phone. She could tell he had been drinking, he was likely out at happy hour with his coworkers now. Maybe he wouldn't notice what was going on through all the background noise on his side.

"Honey, I think you're muted.. is this a butt dial? Honey you there?"

Mark decided to speak first.

"Oh dad hey, I think Mom might've hit the phone by mistake." Mark continued his motion back and forth. He pulled his hips back far enough that his head slipped past her chin and then pushed up again hard. His dick bent halfway when the tip made contact with her cheek, providing some resistance before sliding back towards her hair again.

"Mom just left the couch to go grab another bottle of wine. I think she must've hit the phone by mistake on her way up!" He told his father in a lax tone.

"Oh hey bud! Thanks for staying home and watching a movie with my girl, I really appreciate you two keeping her company while I'm out."

"Actually it's just me and mom tonight." Mark rested his legs more onto Lianna's body, putting his balls completely on Lianna's stomach as he did. Lianna didn't notice before how much heat their bodies generated together, how heavy even his balls could be. Mark continued talking without missing a beat: "Sarah dipped out a few hours ago to hangout with her friends."

"What a bummer she couldn't hang out with you guys. Thanks for being a trooper and spending some alone time with mom then, I'm sure it's not easy missing time with your friends. Hopefully there's nothing big tonight going on you're missing out on." Brian replied.

"I think the big thing is right here at home dad." Lianna could hear the undertone in Mark's voice, he was daring his father to probe further. When Brian didn't reply Mark kept going. "I hope mom cleared it with you first, but she left me have a glass of wine with dinner. I hope I'm not in too much trouble."

"Consider it your reward for treating your mom so well kid. I think I can forgive her just this once."

"Oh wow, Mom's back and she's got a much larger bottle this time, this thing must be what, two liters mom?" Mark said in fake surprise. He motioned for his mother to speak on the phone, held the speaker towards her while he continued to rub his cock between her breasts.

"Please. Don't make me." Lianna said under her breath, hoping Brian wouldn't hear.

"I didn't know we had anything that big at home?" Brian replied, voice noticeably more drowned out now from the background of whatever sports bar his company had picked for the late night camaraderie.

"I don't think you did before dad, I think this is a new thing mom just bought. Mom, dad's on the phone, say hi!" He motioned the phone to her again, giving her little choice but to join in on the charade.

"Hi honey, how's are you?" She managed to say, Mark's dick moving like an anaconda on her body, pushing more aggressively now, a harder stroke than he had been managing previously.

"I'm doing great love. Our second day here went fantastic, I think the clients are going for our pitch, we're probably going to sign them tomorrow before we leave."

"That's amazing honey. Oh, ungh, fuck." Mark began to reel his dick back from beside her head, ending his stroke now just at her chin, hitting it like he was practicing for a boxing match. She wondered if Brian could read the tone in her voice, the lack of true excitement. "Sorry I, I almost spilled my wine. That's great about the new client, I hope you finish with them soon."

"I think we will, I think it's sure shot that we'll finish the deal, maybe tonight if we're lucky."

"I think the three of us will finish here soon too dad." Mark chimed in.

"I thought it was only the two of you? I thought Sarah had gone out for the night?" Brian said in confusion.

"I thought that's what I said dad, just the two of us." Mark replied. He was toying with his father and his mother at the same time, a double meaning of who and what would be getting finished.

Lianna wanted to end the call quick, put an end to Mark's sick, fucked up game. "We're about to end the movie honey, I'm hoping it's over soon. Can I call you back tomorrow while you're on the way back?"

"Absolutely honey. I love you guys, and thank you Mark for taking care of your old man's girl while I'm out!"

"Don't worry dad. I'll always take care of her."

Mark looked at his mother and ended the call before either of them knew it was truly over. He kept a hold of the phone and leaned forward over his mother, putting his hand with the phone over hers and using it to squeeze himself harder through her tits. His other hand steadied himself on the bed. He pistoned hard with his dick now, dragging the length of it forwards and backwards across her stomach, chest, and neck with each motion. His balls dragged heavily along her chest now.

"You're a fucking asshole." She scolded him. Her motherly instincts were all she held over him now as he continued to be rough and asserted dominance. She didn't stop him, but she hoped that harsh words worked as well on him now as it did when he was just a boy.

"You like it don't you. You didn't stop me from titty fucking you while we talked with dad. You know I'm the man of the house now, and the man of the house gets what he wants doesn't he?"

Lianna knew he was trying to get a rise out of her now, she could tell that it turned him on.

Despite that, despite knowing the game he was trying to play with her, deep down she knew he was right. All family relationship and all previous boundaries between mother and son were gone. The only thing that remained now was a man with a thick, impressive member that was pinning her down and fucking her tits like property that belonged to only him. Deep down Lianna knew that he was right. He was not only just her son anymore, but the man of house, born to use his women how he saw fit.

Mark's strokes grew more controlled, he grew more quiet. She could tell that this was the time a man usually ended up finishing. She pushed her breasts more aggressively on his manhood, hoping to speed the process along.

All that Mark offered now were grunts and deep breaths. He dropped the phone to the side and put both his hands down onto the bed to focus his energy. He began to offer long, singular deep strokes. Each grew shorter than the last.

She thought she might have more time to prepare, but just as Lianna realized her son was truly at his peak, a long rope shot violently out of the penis head in front of her, followed by another shot just as powerful.

This cum was far thicker than anything her husband could accomplish, thicker than Mark has given with his previous body. It was sticky, extremely viscous. The first shot had launch at her head, caught her chin with the full blast. The second and third were impacted by the force of the first shot, his penis had twitched and it had shot well past her head, sending a rope of cum onto the pillows and the frame of the bed behind her.

Lianna was already stressed about the potential for cleanup from her tryst with Mark and Sarah on the couch yesterday, this cleanup would take days if not weeks to get out of everything. It had probably stained her mattress and would soak through her pillow cases into the pillows themselves.

Mark pushed back and grabbed the pulsating beast with one hand, the other grabbed onto Lianna's leg. The head oozed cum, Lianna had been lucky that the first blasts hadn't hit her eyes directly. It had glazed over her chin, her neck, and a large part of her left cheek, but she had still managed to keep her eyes clear. She saw the tip of Mark's penis dripping cum, then another large rope emerged from his cock and shot it's way onto her tits, still managing to splatter the bottom of her chin as she recoiled away from the blast.

It took four or five more ropes before he was done. The cum connected both of them now. The tip of the gargantuan penis in front of her was glazed over, resting now on her stomach. With his body now positioned further down to her pelvis, the shaft and head rested just above her left breast, sitting neatly on top of it.

Mark looked down at his hard work and smiled. He owned his mother, there was no doubt of it. The cum from this body was dense, milky, and white. It was connected by strings of white where it laid on his mother, conjoining the two of their bodies. With the release he felt a come-down from the high of their work together. He felt a strong pang of guilt for trying to involve his dad so directly, a hangover of his dominance.

"So..." he started. "I'm uh, sorry for uh, I'm sorry for calling dad just then."

"You're fucking sorry huh?" She prodded him. "You're fucking sorry?"

"I thought it would be more exciting I think. I don't know what came over me."

"You came all over me you idiot Mark." Lianna found her scolding voice. It sounded no different then when she had told him off for forgetting to study for his exams in high school. It was perhaps the hottest part of the entire event; Mark, with a giant penis on his mother, minutes after finishing on her chest and face, going through a routine scolding for the act. The flip side of the sexual event being tinged with a normal mother son interaction made his dick harder and made him love his mother more.

"You're cleaning my sheets, you're getting the stain cleaner and getting this mattress cleaned up." Lianna continued to rip into Mark. "Before you go to bed tonight you're putting all this into the wash and figuring out what baking soda and vinegar mixture you need to get the smell out of this fucking bedroom. Put on that four-armed body and get to fucking work now."

"I figure we should probably both shower before, right?" Mark inquired to his irate mother.

"Yes."

Mark got a few good looks at his mother in the shower before he changed back into his normal body, then into four-arms to get things working around the house. He had quite a bit of cleaning ahead of him, couch, bed, sheets, floor - plus work things over with his mom for the second time this weekend.

The life of an alien could be hard, but it was worth it.