Jessica does

This mutual masturbation was asymmetrical. Mallory was phoning it in, flipping her fingers across Jessica's labia and lightly tapping her clit to get this over with. On the other hand, Jessica was trying her darnedest to pleasure the class president, but Mallory had her legs clamped shut like a vise to limit how much Jessica's fingers could access her private place, and so Jessica's efforts largely came to naught.

It turns out Mallory didn't need to do much work, as after only a minute or two Jessica yelled in pleasure and collapsed into sitting under the shower. She rested her back on the wall and stared up blankly into space.

Mallory stepped back from the shower and looked at the naked pile of flesh before her. She looked around, and noticed that the locker room was empty, for now at least. She had to give a presentation to the Class Assembly later today, so she had no time to spare if she was to get out of this mess and regain the dignity she had lost over the past half hour. She didn't know where the fuck Olivia was, so her best bet was to go to the Lost and Found for some spare clothes before she could be located. As she was wringing her hair out, Mallory thought about how surreal the situation was, and couldn't help but feel a little heat in her own loins as well...