Megan felt a shock as she touched the medallion to the pair of boxer shorts she had in her hand. It was then that she felt the changes start to happen- luckily for her, she gambled correctly. Since she was holding underwear, that's where the changes would start from.
As she looked down, she felt her pussy start to tingle... there was no turning back now. Well, not for 12 hours, anyway. She could feel her clit start to pulse- she had a desperate ache to stick a finger in and go to town, but as her labia began to distend, she realized that wasn't going to happen.
Her desire to touch herself became fulfilled as her clit emerged from the no-longer existant hole, and grew in girth and in length. Her pussy lips melded together under the enlarging clit until they formed a scrotum, now magically occupied by a set of balls- her former ovaries. She reached down and rubbed her clit, now 6 inches in length (and growing) and stroked it up and down- gasping slightly as a small opening appeared at the tip.
Megan was now the proud owner of her very own dick. Realizing this was as far as she wanted to go, she dropped the medallion immediately. Still a sexy chick, but with some decidedly male enhancements. Nick was in for quite a shock. She locked the medallion in Nick's desk, and put her own underwear back on, her new dick tucked safely away between her feminine thighs.
She finished getting dressed and went back out to greet her new girlfriend.