Slipping back into the classroom, Mr. Smith didn't give her any more attention than a glance upwards from his chalkboard as he continued the lecture. Darting back to her seat, Jen tried to concentrate for the rest of class. Nearly all the way through, she decided to have a bit of fun, as they started on that day's homework.
Glancing around, Jen then snuck a peek at her tits, compared to everyone else's. For a senior, she had a rather large chest, at large, full, C cups, pushing towards D's. Concentrating, she willing her boobs to grow to DD's.
A tingling started in her tits, before they started to slowly expand. Farther and farther they grew out, before finally stopping at close to half again as large as they were before.
Looking around, Jen saw that no one else had noticed. Emboldened by this, she willed them to grow to FF cups by the time class had 5 minutes left.
Looking back down at her biology questions, Jen felt that tingle start up again, her chest slowly getting heavier as time passed.
Finally, the tingling stopped, and she looked down to see her boobs nearly spilling onto the desktop! Amazed, she set her pencil down and hefted them, marveling at how big and heavy they had gotten. This was amazing!
Before she had time to marvel at her new tits any longer, the bell rang. Gathering up her school supplies, Jen was very much aware of the heavy weight hanging off her chest as she went about her tasks. Standing up, she stumbled a bit as she got used to the new weight. Grinning, Jen proceeded to the next class, looking forward to when she got home.