You cum down her throat, right after the bell sounds.

Tears stream down Sarah's face as you ruthlessly facefuck her, using her throat as your own personal fuck toy right in the middle of the locker room. You feel yourself getting very close, and as soon as you hear the bell go off, you hold her all the way down on your cock as you start to shoot cum down her throat. She starts gagging all over again, her fingers all but forgotten as she struggles to hold on to her consciousness. After you've finished cumming in her, you slowly pull her head off of you.

"Sorry, Sarah, but I can't pass you for that. The best I can do is give you a 50, for effort. You just aren't good enough."

You wipe your dick off on her tear-lined face, making her makeup that much worse before you finish by drying your dick with her hair.

"If you want, though, I can help you practice some more after school. Let me know."

You dress leisurely, Sarah trailing behind you, dazed from her first-ever facefucking, as she slips back into her slutty school uniform.

Life is good.