What had happen to Jon's Dick

In the girls locker room Karen had finished getting dressed and was adjusting the bulge in her panties. Before Karen stepped out she looked over a Sarah who had yet to put her bar on and started to get an erection. Karen smirked and headed out before she got a noticeable erection. She giggled to her self and thought "I'm so glad I stole this thing from Jon it's so fun and exciting. I might have to consider keeping it."