She gets mercy...after a show.

"Please don't make me cuff myself," Eve says, acting scared, "I'll be good without them."
"Many girls say that. None are."
"Not me. I'll prove it. Tell me to do something and I'll do it for you."
"Very well- masturbate for us."

She acts 'shocked' at this and tries to 'compose' herself.
She 'recovers' and lays down on the tile.

She begins to touch her pussy while Christina and Ms. Banks watch...

The girl in your grip can't help but be turned on, even with everything around her.
The bound Student and Teacher with you have no qualms about that.

As she gets more turned on and closer to orgasm, Eve rolls over and rubs herself even harder...

Eve is really close to orgasm.

"Don't cum without permission," you say.
Eve looks at you 'nervously' and nods.

"...may I please cum...Master?"
"You may, ****."

The busty Student cries out in orgasm.
Christina is turned on as you rub her pussy.
She hates you...but she loves this.

"Very good, ****. There's still one more thing to prove your submission to me..."