A couple of hours passed and the sky had already darkened when Luke-Max decided to stop his stroking session, their abdomen was covered with cum, Max's hand was still playing with his shared penis and Luke's hand lay on their chest.
“Well that was great” said Max
“Oh I know, I just wish we could be like this forever”
“But who said we can’t?”
“Well we can’t remain like this while Evan is around, or at least not for too long”
“In that case we should unjoin before he gets bored of playing videogames and find us like this”
“He will never get tired of videogames, even less if he’s playing with someone else, but you are right we’ve been like this for a while and we should go downstairs to see how they’re doing”
Immediately their body split in two, leaving Max on the left side of the bed and Luke on the right side, both were naked and had cum on their abdomen. “Oh, I think we should have cleaned ourselves before unjoining”
“You’re right now we gotta do it twice, Hey, who’s cum do you think it is, mine or yours? Or do you think we are covered in our own?
“uhh, I don’t know, maybe it is both, or none, maybe it is from our conjoined body”
“What do you mean?” asked Luke
“well, you know that when we join we can control which shape do we want to have, if we want to be half-half or have 3 or four arms, or having both of our dicks instead of one” started to explain Max
“Yeah and?”
“what I mean is that we control or decide our external shape, but for example we do not get to decide whether we have one stomach or two, so maybe that’s what happens with our cum, maybe our internal fluids combines too, like our cum, or our blood, I mean, I am B - and you are AB +, don’t you think it is weird than none of us have died before just by mixing our blood?” Explained Max
“Well I’ve never thought about it but, how do you know all that stuff?”
“My dad is a doctor remember? And he also talks a lot on the phone.”
“So you say not only our appearance change but our DNA too?”
“Well it’s possible, I don’t know”
“Wow that is so cool! That means we do get to become one person”
“haha yeah it actually is”
Max got out of bed and took their clothes, on the floor in front of the bed, for a moment he stared at Luke and smiled.
“What is it?” asked Luke
“It’s nothing, just, take your clothes” max passed his clothes on to Luke.
The boys got dressed without anyone noticing Max's scar on his left leg, which Mark should have. A couple of minutes later they were both coming down the fully dressed and laughing stairs.
“Oh so that’s where you’ve been” said Mark when he saw Luke and Max coming down the stairs.
“We were just cleaning up the mess upstairs” said Luke
“Yeah right” replied Mark knowing what they were really doing.
“Hey, what do you think if we all watch a movie?” asked Zack
“Yeah that sounds like a great idea” said Evan
“Yes but we wouldn’t make it on time to the movies theater, it’s already 9:30” said Max
“What about movie right here, we just gotta download it on to the computer”
“Like that idea more, I’ll go make some popcorn” said Mark
Later on the five of them just watched a movie in the Livingroom until Evan and Zack felt asleep, and Luke and Max started making out leaving Mark watching the movie alone.