Jon felt the wish kicking in as a throb through his body. It wasn't painful, but he felt his entire form jiggle softly and expand into the bra which was already pressed tightly around him. He felt the tendons and flesh within him pull and tighten, pushing his new body forward and outward, giving his body a more unnatural shape, as if he was surgically added.
As the feeling of the first wave of expansion ended, Jon couldn't help but notice that, even as Karyn took a breath, he could feel his entire body shake and jiggle for a few moment's afterward, his flesh offering almost as much resistance to movement as a jug of water has resistance to splashing.
Another wave of expansion washed over him, and he could feel his soft flesh come close to spilling over the tight bra around him as his body became even more compressed.
He could feel Karyn's gaze on him again, even without seeing her eyes, he knew it was a gaze which was cruel and sadistic. "I wish that, no matter how much my breasts grow, they'll just feel more and more compressed and uncomfortable in that bra until I decide to change or grow it."
Jon felt his body shift slightly, and the pressure inside him increased marginally, the process of his body pushing it's way out of it's prison of fabric ended. He felt a hard slap come down on him a moment later, and while it caused no pain through the layers of fabric around him, the slap sent his entire world spinning as his entire body waved back and forth thanks to the force put upon him.
"That's perfect," Karyn said, slapping Jon again as the jiggling in him finally ended. "I bet you are loving this."
Not addressed directly as his new "name", Jon was unable to speak as he endured a few more rough slaps, and was subjected to a number of playful jumping jacks. He felt as Karyn grew bored of him and began to walk, her every step sending his ever-larger form bouncing and rolling within it's tight prison.
"Oh, that man over there looks like a perfect candidate. Well, tits, you are going to show him quite a lot of fun."
"Please don't let him pinch my nipples too hard" Jon said, even as he wanted to tell Karyn to please not let a man anywhere near him, and was forced to express only the concerns and thoughts which a pair of breasts might have.
