Thinking it wouldn't hurt if she made a wish before Jon got back, Karyn decided to make the one wish she had been planning on making all morning.
"I wish I had C-cup breasts," she said. This way, it wouldn't contradict her previous wish of having bigger breasts, because she originally had B-cups and C-cups were bigger. She was just being more specific, which was allowed.
The stone glowed and Karyn was relieved when she felt her too-large breasts shrink to a more manageable size. She smiled, but then her smile faded as she suddenly felt strange.
She looked down at herself in shock, watching her body and clothes changing right before her eyes. And when the change was complete ...