Oh, man, Dustin, you're going to get it this time, thought Ty angrily as he struggled helplessly inside the warm slimy darkness. He felt hot goo bubbling around his toes as he sank deeper. Dustin's giant fingers continued to massage him deeper inside body. Ty was horrified as his tubular legs were bending in the hot goo. He was certain that they had been sucked into one of Dustin's testicles. He could hear the muffled moaning of his giant foster brother, along with the racing of the hot blood through Dustin's swollen member.
Dustin, I'm going to make you feel what I'm feeling now as soon as I get out, Ty promised himself. Then he had a thought, I may be reduced in size and powers, but I bet I can still teach Dustin a lesson. Ty grinned as much as his crushed tubular head would allow. Then he began to concentrate.
Dustin's body began to twitch. His whole body was tingling. He felt so alive, so real. So horny. Both his hands seized his manhood. He completely forgot about Ty, and concentrated only on the experience.
Yes, thought Ty, yes, yes, yes.
Dustin's body was slick with sweat. His brown hair was even tingling. If Dustin had paused to check his reflection out in the mirror, he would have noticed that he was getting thinner, blonder and paler. He might even have realized that his body was changing into Ty's body. Each cell in his body was slowly having its genetic code overwritten in favor of Ty's DNA. The hormone levels in Dustin's changing body were crazy reducing his thought processes to just slightly above a stag in rut or a dog in heat.
Dustin could feel the orgasm coming, but wasn't able to cum yet. "It must be the silly putty," he muttered, "This so intense ---Aaaaaaaaaaah!" The last part he said in Ty's voice, but he was too wrapped up in his orgasm to realize it at the time. Then Dustin was suddenly in the dark, he was immobile. It was hot and slimy, and he felt enormous pressure around his lower body. A circle of light opened above him. Suddenly, he was rushing upward. Somehow Ty had cheated him out of his orgasm. He was just about to cum when it all stopped and he was in the darkness. Now he was racing toward the light. He wondered if Ty had killed him, and this was what people meant when they talked about moving toward the light.
"Oh, yes!" exclaimed Ty as he orgasmed. He arched his back. It was his back. It was his body. It had been Dustin's, but it was his now.
The silly putty Dustin shot out of Ty's cock and tumbled followed by a fountain of white goo on to Ty's treasure trail. Dustin caught a glimpse of the giant naked Ty sprawled out on Dustin's giant bed. He knew what Ty had done now. Dustin was just a tiny piece of cum covered silly putty. He thought angrily, if I was big...
Then to his surprise, Dustin began to grow. He wondered if Ty had heard his thoughts or if possibly Ty had screwed up his body swap. Dustin would know soon enough.
"Oof, you're getting heavy," complained Ty as Dustin grew to size of a silly putty puppy and continued to grow on top of Ty's abs.
Dustin wondered if Ty's transformation of Dustin's body into Ty's body followed by the transfer of Ty's mind and soul from the silly putty to the giant Ty body might have neglected to transfer his powers as well. Dustin continued to grow, as Ty lifted him of his torso and set the growing silly putty on the floor. Then, Ty began to stomp the growing pink mass with his bare feet. The living silly putty made an odd snapping mucky sound as Ty stomped.