Humiliate her

You look at the entranced bitch. "Wet your pants!"

Patsy stands there as a wet spot forms in her crotch and runs down her thighs.

"Patsy, no matter how hard you try, you cannot remove your jeans today or even pull them down until tonight at 10 PM. You will also not shower until tomorrow night. Now you will also remain at school today and go to all of your classes. Any time you make eye contact with someone, you will loudly tell them you wet your pants. Understand?"

Patsy nods.

"Also, you must obey me. You cannot hurt me. If you go to hurt me, you will slap yourself hard in the face instead. Understand?"

Patsy nodded.

"Whenever I say 'Fuck you, Patsy,' you'll go back into this trance. When I count to three, you'll snap out of your trance. One...two...three."

Patsy blinked then looked down at the crotch of her jeans. "What the fuck?" She looks back up at you and looks you in the eye. "I just wet my pants!"

"Ugh, what a disgusting freak you are!" you say.

"Shut up you, bitch!" Patsy goes to punch you but slaps herself in the face really hard, leaving a red mark. "Ow! What the hell?"

"Go crawl to your next class," you tell her haughtily.

Patsy drops to her hands and knees and starts crawling off as you laugh at her.