Stick a vibrator in her pussy and wait until she cums

You slide a very very large vibrating dildo into her wet pussy. She moans, hips bucking to get the full thing. You push the rest of it in and sit back down, turning the level up to 100%.

"Ahhh please not in front of my class, take it out please!" Ms. Victoria whines.

"No, no, we still have 20 minutes of class left." You say. "20 minutes for that pussy to come over and over again."

"You will regret this I swear-hnnnnngh..." She moans, writhing as she squirts. But the vibrator keeps going, and she keeps cuming. All over her thighs, the floor, even spraying some of her students.

"Damn, Ms. Victoria, didn't know you could squirt like that." Brad said. The humiliated professor heard this, and only squirted harder. She had been stuck like that for 15 minutes, and had cum five times.

"Please, let me out! I-ahhhhh-can't take it anymore-hhnnnnggghhh" She came again.

"Actually professor, I think you're enjoying this." You said, watching her trembling pussy. But little did you know she had been untying her restraints slowly, and was about to break out.