Jake's words were lost in a moan as his older brother sucked one of his four cocks. Within seconds, he was blowing his load down Luke's throat and all over the rest of the room. He lost himself in the orgasmic flood that flowed forth from his cocks, but he could feel Luke swallowing as much as he could before it became too much and the excess was spattering out of his mouth. Jake tried to force himself to stop again, but he just couldn't. To his surprise, he felt Luke reach for a second cock and try to fit it in his mouth. It was quite the feat trying to get the constantly-spewing head in with the other, but somehow, Luke managed it. Jake felt like he would pass out from the pleasure, and after a few more moments of being lost in his orgasm, he managed to close his eyes and grind his teeth as he focused on trying to stop the torrent of cum shooting from his four cocks. Jake was visibly straining with the effort, but he managed to slow the stream until he felt his orgasm was just-barely contained.
Luke, meanwhile, gulped down everything his brother could throw at him while Tommy continued pounding his ass with his cocktongue. When Jake's orgasm subsided, he looked down at himself and saw that his stomach was slightly bloated from all the cum he had swallowed from both of Jake's cocks. He reached down to rub his belly and moaned as he felt a warm sensation all over. Tommy continued to thrust into Luke's ass, when he noticed the feeling of the older boy's taint against his nose had changed. Looking up at Luke, he gasped and felt himself coming hard from both cocks at the sight of the older teen.
While Luke had been slightly husky before, his fat seemed to have melted away as his muscles had swelled everywhere, with a distended eight-pack visible at his belly. Luke was gasping and rubbing his stomach, leaving his cock abandoned for now, and his ass seemed to have pushed out slightly. In fact, it looked like he had managed to completely bend his legs over himself almost like a contortionist. Tommy could feel himself hardening up again as he saw that Luke's ass was changing, his cheeks becoming less defined as his legs seemed to fold in on themselves again and push his ass away from the rest of his body.
Luke began to furiously rub his belly, as if trying to push all the cum he had ingested into the rest of his body, and as he did so, his legs started to fuse together into his lengthening body. He didn't notice, however, because rubbing his stomach was the greatest feeling he had ever felt, as if his stomach itself was a cock needing his ministrations. Luke continued to rub and stroke his stomach, smoothing it out little by little, as orgasmic pressure built within him. The more he rubbed, the hornier he felt, until he could feel his dams breaking and roared in pleasure as the pressure released itself by spewing enough cum to rival Jake's. Luke panted from the exertion, his brain wracked by so much pleasure that he failed to notice what had happened to him. Tommy and Jake, however, were not so distracted and stared mouths agape at the mutated teen.
Gone was the not-quite-chubby teen that Luke had been before. From the waist up, he was a man, who looked like he could grace the cover of fitness magazines everywhere. His muscles were lean and defined and exuded raw power, and his eight-pack would put anyone to shame. But what really caught Jake and Tommy's attention was what had happened to Luke below the waist. Where one might have expected to see a pair legs found on a Greek god, Luke had a single cylindrical appendage that ended in a mushroom-shaped growth with an opening that was still gushing a sticky, white substance. Thick veins grew from his abs and wrapped around his lower body, which had to be at least four feet long now. From the waist down, Luke was now a giant cock, and his orgasm was enough to rival Jake's.