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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."
