"Do to us?" Todd asked. He was more confused than angry at this weird statement by the kid blocking their way.
"Come on, son," said Dean. "This kid's just playing make believe."
They walked around the strange kid on their way home. As they walked they found they were drawn toward each other, nudging each other, sometimes leaning into each other.
"Are your clothes baggier, dad?" asked Todd when his hand brushed his father's sagging pants.
"Maybe I lost a little weight at the gym."
When they got to their house they tossed their gym bags onto the chair by the door. "We're home!" Dean called, but no one answered. His husband Chad must still be out. "Well we can take our showers." But they seemed strangely reluctant to part ways in the hallway outside of Todd's room.
They looked into each other's eyes and Todd realized he was looking down. "Dad... are you... shorter?"
"Nah."
"But I'm taller than you. I've never been taller than you."
Dean just shrugged. His all-American features looked comically blank. He realized he was looking up at his son, and that his clothes were starting to hang on him, but somehow it just felt right... and when Todd went into his room Dean naturally followed.
"Uh dad... I need to get undressed for my shower."
"I'll watch. I want to see your penis."
"What?"
"Your penis. Your cock. Your dick. Take off your clothes, son."
"That's... weird, dad," said Todd, but he wondered why he was tossing his clothes off as his father watched. Dean hadn't seen him naked since he was a little kid. He was embarrassed given his sleek frame compared to his dad's muscular and well-hung body... but weirdly he also felt sort of proud. By this time he was looming over Dean who was only half as big. Todd realized he should be freaking out--they both should--but they were oddly calm as Todd stood naked in front of his father and Dean shrugged the rest of his oversized clothes to the ground.
"Get on the bed, son," Dean commanded, moving closer. He was looking up at the underside of Todd's clothes now.
"Uh dad... I think I'm in charge now. Don't you?"
"Y-yes. That's weird but... I think it's true." Dean's handsome features contorted in confusion.
Todd did sit on the bed though. He thought it was funny how hard his father had to work to climb up. He loved his old man... worshiped him... but there was something right about this situation. He had a flash of that weird kid they'd seen before smiling at them. "You seem fit for each other," he'd said. What did that mean. What did it mean that Dean had finally made it to the top of the bed and was standing next to Todd's thigh, and neither one of them was questioning this turn of events. The older man was only a foot tall at this point and was staring at his son's twitching cock... and Todd couldn't help but want to touch himself from the attention. But before he could Dean jumped forward and wrapped himself around it.
"Ugnh!"
They both moaned and writhed as the shrinking man hugged and wrestled with his son's cock. More and more it was fitting into his arms like a lover. Their skin felt so warm together, then hot, then like they were melting together. Dean's vision went blurry, and he lost control of his limbs, and then there was a deep pounding in his ears. Something large wrapped itself around him. Something strong put such force on him but it felt right.
There was a white flash in his brain, a shudder through his body, and when he could catch his breath again he realized that he'd stopped shrinking... but the weird thing was, he couldn't move. His legs were gone and his torso was merged with his son's groin. Todd's hand tugged him again and he realized he was his own giant son's cock.