Double shortstacks

It only took a moment before the class had finished voting and you heard the Professor's startled whimper. You took a few steps back so you could watch both her and Vanessa. The change seemed to be taking a little longer this time, which you definitely appreciated. Moment by moment, Nakamura got closer and closer to Vanessa's height. She stumbled and grabbed ahold of the podium as her center of gravity shifted, while Vanessa's hands flew to her chest and her feet spread wide apart. She didn't say a word, just stared down at her shifting proportions in a mix of fear, wonder, and confusion that you were getting to know well.

Vanessa's chest slowly went from attention-getting on her small frame to truly outstanding. Her thighs rubbed together as her backside thickened, her hips swelling similarly. It only took a few more seconds before they were done, and the sight was damn impressive. While the Prof was still obviously more impressive in her tits and ass, especially on her newly smaller frame, but Vanessa's startled blush and overall proportions made for one hell of a picture. She looked less fake than Nakamura's ridiculous tits, seeming natural and soft in all the right ways. You quietly goggled at her new assets for a bit (along with the rest of the class); she'd gotten way bigger than you'd thought she would with just a few inches of height stolen from Nakamura: she had to be bordering on something like a G cup now!

You snapped your fingers, realizing what happened. "Got it!" Turning to the class, you took on a mockingly professorial air. "You see, class, since I said Vanessa would gain the Professor's mass in her assets, the greater density of the bones and muscle got turned into a heck of a lot more oomph for her. Not quite what I intended, but I think it turned out pretty well if I do say so myself."

Turning back to Vanessa, you gave her your best grin as you admired your accidental handiwork. She looked back at you with an expression that bordered on terror, and her big brown puppy dog eyes made you hesitate for a moment. She was looking so delicious now, you'd been about to follow up on her body's changes with something a little more explicit, but her fear made you remember you weren't here to punish her - this was supposed to be Nakamura's show!