The part of Tony that wanted to run away continued to get weaker. The burning in his chest felt too good and the sex was amazing. Tony wrapped tightly around Alice and they slowly slid to the floor. Tony laid back. His big butt thrust his pelvis higher than his head, but that put more pleasurable pressure between their genitals. Alice's next thrust was the best one of all. Even though he knew his butt was incredibly fat, it was also so firm that he felt proud of its contours.
The burning in his chest continued to glow. Tony pulled off his shirt and looked at his chest, half-expecting to see breasts sprouting like volcanoes. Instead, he saw his torso shrinking. As Alice laid on top of him he found that his eyes were now level with her neck. His neck. He recognized his own neck. They were swapping bodies. Tony felt panic all over again. A part of him knew that was happening, after all he had seen, but he didn't want to believe it. Losing himself was too horrible. He had to get her off of him. But then Alice thrust again and he fell slave to the pleasure.
His tummy exploded. He watched his belly button rise like a ship on a tidal wave. The increased body didn't feel gross, though. It felt right. Like he was finally pushing out to his potential. At first the excess belly just pushed straight up. Then his sides pushed out, too. He grew love handles and then those widened until his tummy was two-thirds of a tire that reached around his body. And when the growing stopped, he realized that he wanted more.
Alice continued thrusting and her smile got bigger and bigger.
Tony knew that he could have pushed her off and run away at that point. It felt like one last chance to escape. But his entire body reached deeply and felt so near orgasm that he continued. He just needed that extra moment to achieve climax. After that he would push her off.
Tony felt his arms begin to collapse. His long, muscular arms retracted several inches. To Tony, it felt like they were now half their original length. The size didn't change much, but the composition did. Those old, tired muscles gave way to a beautiful, pudgy fat. Tony stopped that thought. When did he think fat girls were beautiful? Samantha wasn't fat. And when did he decide he wanted to be a fat girl? Why was he enjoying this so much. Come to think of it, he didn't remember why he had been attracted to Samantha in the first place.
Tony's neck had shortened, so he felt that his chubby cheeks were nestled among his chubby shoulders. He looked up and saw his own face looking down at him, smiling widely. He knew that his face must look as Alice's had when they first met. He couldn't process the thought of losing his own identity because that orgasm was so close. He pushed upward toward Alice and strained.
Alice reached down and touched his chest. He looked down - difficult with his shortened neck - and he saw that his nipples had grown broad and loose. They were sensitive to the touch. Her caress filled Tony with ecstasy. His vagina craved that orgasm and he clenched all the muscles in his fat-covered body trying to achieve it.
That was when his breasts finally burst out of his chest. The sensation was so intense that he screamed. The boobs sprouted out, smooth and even, pulling those enormous nipples taut. Alice's hands on his new boobs fanned the flame and Tony found that elusive orgasm. His breasts were so big they shook as his body was filled with pleasure. He wanted to watch them as they grew - his crowning achievement - but he was forced to pinch tight his eyes. The pulsing waned; the orgasm diminished, but Tony was left was an amazing new body.
Alice pulled out of Tony's vagina. Tony looked up and saw his own naked body standing over him. Tony was perched so awkwardly between his short limbs and his butt and back fat that he couldn't get up, and that was when reality hit him.
"Well," Alice said, "I hope that was everything you wanted it to be."