"No! They're too small Ty!"
Ty had just about had enough. There Dustin was, a great big jock, pissing himself like a 2 year old, and he was still giving Ty orders like he was some kind of slave. On top of that, Ty still couldn't figure out why Cindy even liked the guy, and why she was still going to stick by him even after he embarrassed himself in front of an entire department store. And there was Carl, moaning helplessly in the dressing room with Carl, still in shock over what had happened. This was turning into a giant freak show.
Finally Ty lost his nerve, and yelled "No Dustin! You're just too damned fat!"
Ty looked like he was going to keep yelling, but then he stopped cold, and a cruel leer slowly crept onto his face. Ty was struck by an idea, a perfect idea. One that would fix this madness and give him his final revenge against Dustin, Carl, his foster parents, and even net him Cindy as a bonus.
Ty kicked open the stall door, Carl's head barely missing the swinging arc. Dustin was still trying to put his pants on, desperately manipulating the zipper, when Ty barged in. Dustin's scream of outrage died in his throat as he saw the evil grin pasted on Ty's face. "Wha... What are you doing," was all he could manage.
"I'm going to fix your stupid pants. I'm going to fix everything..." Ty said cryptically, still leering. Then his face changed, suddenly becoming warm, open, friendly. "What are you doing with those jeans, bro?" Ty asked, almost casually. "There's no way they'll fit you; you being the biggest linebacker in the high school team and all..."
"What are you talking abou-" Dustin stopped as he realized what was happening. Suddenly his too small jeans became even tighter as his muscular but trim frame bulked up. Dustin already had the strength to be a linebacker, all that was missing was the weight, and Ty piled that on with a vengeance. Dustin moaned as his defined abs, abs he had worked years to build, disappeared under an advancing tide of lard. His pecs, once massive slabs of muscle, became even more massive slabs of fat, sagging slightly under their own bulk. His once firm and round ass ballooned even bigger and rounder, remaining somewhat firm but under a thick layer of blubber. His muscular arms softened, his 18 inch biceps losing their definition as his entire arms thickened. Dustin's now fat fingered hands reached up to his face, where he felt his square jaw broaden and become round. His already thick neck, puffed up to become almost larger than his head. Dustin's cut thighs grew thick and meaty, giant tree trunks keeping his now massive frame upright.
Dustin's eyes now dropped downwards, and he groaned anew as he watched the true damage being done. He stared slack-jawed as his thick middle grew into a pot belly, then broadened and surged over the top of his far too small jeans, great thick love-handles bulging over the sides. Ty laughed as his brother bulked up in front of him, becoming enormous, as big as any NFL linesman. Finally as Dustin’s inflation began to slow, he practically exploded out of his far too small clothing, tearing his t-shirt and gap jeans into shred as his massive, bulky body surged outward, bulging in every conceivable direction.