It was a strange week for Jesse. He was perpetually horny, but the tiny three-inch worm that was now his (his brother's) member was barely stiff no matter what he did to it. After a few days of furiously trying to masturbate he gave himself up to frustration. Jesse wasn't some perve, and wasn't going to do anything weird with his brother (who now had his dick) just to get it up. He decided he'd drag Jake back to the fair the next weekend and... be nice. But being perpetually horny had completely wrecked his week. Jesse was a good student, but as he couldn't concentrate he nearly failed two tests. And having prepubescent levels of testosterone did the star center no good on the soccer field; he spent the latter half of the week on the bench. On Saturday Karen insisted on coming over. He was avoiding his girlfriend ever since the pool incident, but she was getting impatient. She was coming and Jesse knew what he had to do.
Andy had taken to walking around the house in just his boxers to show off his new 9" manhood. Having had it for only a few weeks the young teen was already sporting a four-pack and the muscle definition of an athlete; not a boy who spent most of his day playing videogames. "Hey, LITTLE bro," he grinned as Jesse approached, adjusting the large bulge in his underwear.
"Don't call me-" Jesse grumbled as his face reddened, "-look, Andy, I... Karen's going to come over soon. Do you think I could rub my old-"
Andy chuckled, "Sure, Jesse. What are bothers for? 'course its not YOUR old dick, its MINE and don't you forget it! But if you want to get a boner for your girlfriend you're gonna have to do a few things for me..."
"One. You call me big bro from now on. I'm the man of the house" the boy grinned.
"Two. I want you to start wearing those tighty whities you always teased me about, to show everyone whose the little bro," he grinned impishly, forcing a pack of underoos into Jesse's hands. The little bastard had this planned!
"And three? That's it. I just hope you're nicer to me from now on, little bro. I'm sorry you lost your dick, but I'm sure you new one will catch up," the muscled blonde boy gave him a sympathetic smile. And for a moment Jesse almost felt guilty about trying to take his size back from his brother. "But first I want you to model your new undies for me! 'bout time I got you back!"
Jesse groaned and went into his room, changing into the size-L batman underoos. Andy chuckled as he came out of his room and motioned him over to a body length mirror. The two brothers, age 18 and 13, stood side by side. One was abeanpole in cartoon underwear with a few wisps of body hair; the other was a mini-adonis wearing boxers strained by an envious bulge. They looked almost... the same age? Jesse did a double-take. He SHOULD have been a head taller than Andy, and yet he was barely two inches taller. He opened his mouth to say something but didn't want to give the boy fodder. He HAD to get back to Madam Illusia and fast. Jesse turned to go put some proper clothes on when a firm grip stopped him in his tracks.
"Where are you goin', Little Bro? No one's gonna see! C'mon, we never even hang out anymore... wanna play call of duty?" Andy asked.
Jesse hesitated, but he didn't want to lose Karen. The two brothers spent the night playing videogames in their boxers. Andy was beating him more than usual, but he didn't care. It was fun enough to distract him from the fact his big- his little brother had STOLEN his once impressive manhood... and his constant arousal.