Remote control

Mrs. Beckinsale begins class, writing "today's objectives" on the chalkboard. As she does so, quickly reach over and place a remote control vibrator on Doe's desk. You hear Doe gasp quietly, her hands darting up to cover the vibrator as she shoots over a glare.

"Put it in," you mouth over to her. Doe blushes as she realizes what you want her to do, her former innocence conflicting with her new, unending desires.

Doe looks around, making sure no one is watching her. She reaches down and you watch her unzip her jeans as discretely as possible. With the vibrator in her hand, she reaches down her pants. She squirms a little bit, nervous about being caught, but a few seconds later her hand pops out and she rezips her jeans.