Dustin moaned with combined anxiety and soul-rocking pleasure. His 20-inch cock throbbed insistently, as if it hadn't come at all, but Dustin was as physically drained as if he'd been cumming for hours, which he nearly had.
"No, please!" Dusting gasped, rolling his eyes, his face beaded with sweat. "Don't make it any bigger!" His monstrosity of a cock quivered over him, dripping cum onto Dustin's chin. Dustin was eyeing the head, and Ty realized what Dustin was thinking desperately, longtingly: I might be able to suck it now, but not if it gets any bigger.
Ty had been about to make Dustin's cock twice as big, but he stopped and flashed an evil grin. "Not bigger, eh?" he said. "O.K., bro, you got it."
In less time than it takes to tell Dustin was sporting two enormous cocks, both shaking in unquenchable need. The two cocks together were so big and thick that there was no way, Ty knew, that Dustin would be able to get both in his mouth.
"Ty--what have you done? I can't have two cocks!"
"Not just two cocks, bro," Dustin chuckled. "Two sets of balls as well!"
Even as Dustin realized that Ty was right he started to feel his four oversized bals start to churn with what felt like gallons of hot cum. "No---" Dustin wailed. "I'm already passing out...!"
Even as Dustin breathed these words he started to cum, violently, torrentially, a tidal wave of cum spraying endlessly from both cocks, hard enough to knock over the table behind him. It went on, and on, for half an hour, and by the end Dustin, who had been screaming with literally unbearable pleasure as Ty drank in the fascinating spectacle, had collapsed, slumped over and unconscious, as his cocks shivered, rock hard and totally unquenched, poised for more and more apocalyptic orgasms. The entire room was drenched in cum, and there was a pool of cum on the floor just up to Ty's ankles.
Then, suddenly, they grew even bigger, thanks to Ty's afterthought wish: Dustin's cocks would each grow an inch for every quart of cum he sprayed.
Ty sighed, pleased with himself, and pondered what to do to Dustin next.