Emma returned to sit across from Ty, pretending to pocket her cell phone.
"Everything all right?" Ty asked, his boner throbbing in his pants as he saw how huge Emma's chest was getting. She had swollen even bigger during the time in the bathroom, and while it was happening slowly, it was becoming more and more apparent. Equally apparent was a lack of a bra. She was now a big C cup, and the forces of gravity were pulling her enlarged tits down just so subtly.
"Yeah, yeah..." The teen pulled her jean jacket together trying to hide her increased (and increasing) bust. "My brother's being a dick. So! Where were we?"
"Books!" Ty sipped his pop.
"Oh, yeah!" Emma grinned, again self consciously closing her jacket. She tried not to blush, aware that her perky new nipples were stiff. Ty was so much fun once you got him out of his shell, so nerdy, so kind.
Ty, for his part, let the conversation go on long enough to let his dick go down. She was still expanding, but he tried to control himself. The willowy blonde now had an ample chest that was even more pronounced on her smaller young frame. He wanted to experiment with her further, so badly. He wondered what the lovely busty girl would grow up into. Or maybe how she'd look with an animal edge. His mind wandered. Her boobs got bigger.
Finally, Ty stood up, done with lunch. "So, where to now?"
Emma stretched her arms out and stood, pressing her chest out without meaning to. Was she a D cup?! She had to be. Those things were getting bigger, heavier, and rounder by the second, complete with perky and swollen nipples under her blouse. She realized her exposure and blushed deep red, closing her jacket again. If Ty had noticed, he had a good poker face. Maybe she was just being self-conscious about her swelling, or perhaps it wasn't that bad. The boy's indifference made her think the former, because she certainly *felt* a lot bigger than normal.
"Uh... I dunno. Want to go do something? Like hit the arcade? Or, oh, the library! We could go to the library!"
"Hey! That sounds great." Ty agreed. "Let's go!"
He let Emma walk in front of him and grinned. She could use a bigger ass, too...