When Kyle and Chad left to study, Brad was hard pumping weights. Dad was sitting back watching the game. Tad moved into Kyle's empty spot at the end of the sofa. As he sat down, he discovered the tablet wedged in the side of the cushion. The tablet was still open to Chad's profile screen. He glared at his big brother's profile. He suspected that Kyle was helping Chad with his own exercise program. The profile listed detailed measurements, ranging from biceps to waist to dick size. "One inch?" Tad whispered to himself. He had never measured Chad's dick, but he had seen him naked, and knew it was a lot longer. Maybe he meant 10"? Tad added a zero after the one.
Upstairs locked in Chad's room, Chad was now naked except for his collar. Kyle had stripped down to his boxers and lay back on Chad's comfortable bed.
"Come here, boy. I wanna play with my baby's pee pee," laughed Kyle.
"Woof!" said Chad leaping up to shove his balls, one inch cock in his master's face.
"Oh, yeah?" said Kyle leaning into examine Chad's now tiny adult penis.
BOING!
"Yeow!" Kyle's head slammed into the headboard of Chad's bed, as a 10 inch penis poked him in the eye.
"Nah," whispered Tad to himself, "It's probably longer. He hit the backspace on the tablet twice. Zero inches appeared on the screen, as Kyle grabbed hold of Chad's now 10 inch penis. Suddenly, he was holding air. Kyle frowned. He leaned in to examine the empty spot at the top of Chad's testicles. Kyle probed the empty spot where Chad's cock should have been. "Where did it go?" Kyle asked.
"OOoogh!" gasped Kyle. Chad's penis was now filling his mouth and throat.
Tad giggled. He had typed 17 inches for Chad's cock length. He realized this was for some sort of SIM game. Kyle was making a Chad based pussyboi character. That wasn't how Tad thought of Chad. He raised Chad's submissive/dom ratio from 80/20 to 0/100. He smiled, and shook his head. The SIM character's ejaculant had potential, but no attributes had yet been ascribed.
Kyle was struggling with the massive meat that now horny top Chad was plowing impossibly all the way down his throat. What had gone wrong? The tablet. Someone must've found the tablet. SPLOOGE!
The modified cum filled his belly, mouth, and spurted out his nose. Kyle's anger and humiliation faded as the modified cum began to modify him. Ky;e's mastery of dog boy Chad was being replaced by Kyle's Beta Dog mindset. He'd be Chad's best bitch boi. Kyle was now on all fours on top of Chad's bed, and Chad was on top of him doggy style.
"YELP!"
Kyle's rosebud was penetrated, and te 17 inch monster tearing him apart was knotting Chad to him. Hot liquid filled and reprogrammed Kyle.