reward him in the best way you can think of

You stand up and raise your skirt. You then straddle him and lower yourself into his lap. You sit on his cock until you feel it pressed to your cervix.

"What are you-" He tries to say something.

You cut him off with a finger pressed to his lips.

You slowly ride the length of his cock.

"The next time you speak, I am getting off of you, so the next thing I should hear from you is 'I'm gonna cum'. Okay?" You ask.

He nods.

"Good boy."

You fuck him slowly for about 3 minutes

(Oh damn, I am gonna cum soon, I hope he can hold out)

You pick up your speed.

"I'm" He starts to say it.

(No, not now, I am so close, fuck it.)

"Gonna-" You cut him off with a forceful kiss.

He moans into your mouth as you moan back. The force of his ejaculation is so strong, it causes you to gasp as you feel his load hit your insides. Your own climax is moments away, you continue fucking him with everything you have. Your pussy starts to overflow with his seed and it spurts out of you with each thrust. You pull your mouth from his and breathlessly say

"I'm gonna cum, I'm gonna cum hard, please fuck me, please fuck me harder."

He picks you up and places you on the desk, you make sure to slide the loud speaker button out of the way. You lay on your back on the desk as Brad pistons himself in and out of you. Your orgasm takes your breath away and Brad doesn't let up. After a few minutes, you realize you aren't getting fucked anymore and your orgasm ended. You sit up and see Brad slouched in the chair.

"Not a word of this to anyone." You say.

You get dressed and try to button your shirt as much as you can, you quickly find that there are no buttons lift on it. You scrounge the lost and found and put on the only shirt in there. It's meant for smaller chested girls and is form fitting on you and leaves you baring midriff. You tell Brad to clean up and get to class.