Not wanting to have to watch Sean go through pregnancy, labor, and child rearing, Jay decided to accelerate the whole process.
A couple of clicks layer, Jay heard Sean say, "Whoa," and stumble against the wall of the hallway outside his room. There was a loud thump and then some frantic shuffling.
Jay darted out into the hall. Sean, naked as usual, was braced against the wall, panting. The buff-looking naked 18-year-old at Sean's feet looked up at him and said, "Hi, Dad!"
Sean, recovering himself, put out his hand and helped his son to his feet. "Hi, Chris."
Jay stared in wonder. Chris was brushing himself off, looking down at his body. He was almost as tall as Sean and obviously headed towards Dan's outrageous level of muscularity; he even looked like Dan facially, and had Dan's hair. But he had Sean's smooth, hairless skin and... his pussy.
Jay gaped. Sean turned to him and grinned wearily. "Well, I guess I was pregnant." Sean turned back to Chris and jerked a thumb towards Jay. "This joker is Jay."
Chris looked Jay up and down with a leer and extended his hand. "Hi, Jay."
Jay, acting on autopilot, returned the handshake, but was shocked by Chris's strong and lingering grip. "H--hi."
"Aren't you going to say 'Happy Birthday'?" prompted Sean.
"Uh... Happy Birthday?"
"Thanks!" said Chris, who still hadn't taken his eyes off Jay. "How about a birthday fuck?" Chris struck a seductive pose. His body really was quite amazing. Jay was used to seeing Sean wander around naked with his pussy, but seeing it on this new guy was stunning all over again.
"Uh..." mumbled Jay, surprised Sean wasn't jumping in to put a halt to this. "Aren't you going to tell me to stay away from your son?"
"He's eighteen, it's not my fault if he has low standards."
Chris laughed but kept leering at Jay's crotch.
"Eighteen? But he was just born... just now!"
Sean shrugged. "I keep telling you, it's different with guys."
Chris started undoing Jay's belt, and Jay was too stunned to interfere. "C'mon, Jay, pleeeeease?"
Sean started wandering off to his room. "Just use a condom, okay? I already have enough mouths to feed."
"Jay'll feed me, won't you, Jay?"
"Uh..."
"You can have my room, Chris, I'll move my stuff in with your father."
"Okay, Dad."
Sean went into his room and Jay, abandoned with Chris, found himself losing the battle to keep his pants on. "Ugh, both your dads are nudist sex maniacs, I guess it's no surprise you'd turn out the same way."
Chris laughed but kept working on getting Jay's pants down, while Jay wondered who exactly the prank was on now...