Treat her like she deserves

"Prove your loyalty to me by licking the toilet seat clean," you command her.

"Ok," she says in barely audible whisper.

"No, when I give you a command, you bark like a dog then say 'yes, sir, I'm your obedient bitch," then bark again. Understand, bitch?"

"Arf! Yes, sir. I'm your obedient bitch. Ark!" Jessica lowers the toilet seat then starts to lick it clean. She is blushing and growing horny.

You watch Jessica as she finishes up. She looks at you with a pout. "Anything else?"

"Would you want me to fuck you?"

"Yes sir. I am horny."

"Well, you haven't earned it," you say. "Stay here and suck off the next three boys who enter and have them cum on your face. I'll come back and check on you, and if you have three guys worth of cum on your face, I may fuck you."

"Woof! Yes, sir. I'm your obedient bitch."

You pat Jessica on the head and leave the humiliated and frustrated bitch in the stall. As you leave, you see Tim Roberts come in. He's tall, skinny nerd. You nod at him and smile. You wonder if he'll finally get his cock sucked or be too scared. You leave the restroom as you have another target in mind.