"Holy shit…! Fuck…" Doug was gasping for breath as he looked up into Timmy's eyes, who was so lost in the orgasm and still catching his breath.
As his roommate finished unloading inside him, Timmy's dick twitched a few times, and then he came again. Cum did not erupt from his empty balls, but with every pulse of his cock, it began to grow. This did not go unnoticed by Doug, who looked at his roommate's cock with a newfound hunger. Timmy's cock grew slowly as his body began to absorb the cum. Doug, began to pull his cock out of his roommate's ass and felt like he was still leaking cum along Timmy's intestines as he pulled each inch out
Timmy's cock continued to inflate and throb as Doug was pulling out, somehow bulking up. "Fuck yes," he moaned in a voice deeper than before. "I love your cock, babe," he reminded Doug as he was pulling out.
Doug rolled over and kissed his lover, who began to regain some of his features. He paid special attention to Timmy's cock, and could no longer contain the desire to suck that throbbing member while continuing to pull out.
"Mmm," Timmy let out a high pitched grunt as he felt his penis hit the back of Doug's hot throat. "Mmm that's it don't stop!" he yelled with pure lust. This encouraged Doug to suck deeper as the cock was growing. Now, it began to leak precum and slicked Doug's throat. It's a miracle that he didn't cum immediately.
"Mmm, Doug let out a wet noise and moaned out sweet words, saying thank you to Timmy and letting him know just how horny he got and if he'd mind leaving his anaconda cock in his ass forever.
Doug wanted to please Timmy every bit as much as him as he was now satisfied. Tim was squirming and moaning and in his worst moans he squirmed his hips with Timmy's hard cock filling him as if it was his ass and not just his mouth. Much to Doug's amazement, Timmy's balls had begun to swell to the size of eggs as he became capable of producing more sperm again. Additionally, as the bulge in Timmy's stomach began to go away as more cock was retracted, bumps of muscles began to appear, turning Doug on even more. When Doug finally withdrew his cock from Timmy's ass, he could see that Timmy's eyes were closed and his mouth was ajar.
The whole scene continued like this for about five minutes, Timmy's cock growing to an impressive 11 inches and balls to the size of kiwis. He was finally near his starting height, stretching out to 5'10, though this was unnoticed by both him and Doug. The scene quickly stopped with Timmy's ass in Doug's mouth, and after another thirty second stretch of rimming that Doug was ready to move on, Timmy started groaning again, and began to beg for release. The scene was getting really slow, until Doug suddenly came in close with his mouth full of Timmy's cock...