Maybe...?

As they come closer, you start to make out what they are saying.

"Man, I wish I could've gotten my hands on her," one laments. "Maybe I should get May an outfit like that. Think she'd wear it?" The other laughs.

"Of course she would, dude. Then she'd make you parade her around. You'd be fucking her in a classroom before lunch."

Both laugh, entering your vision as they headed towards the parking lot on the other side of the theater. You feel like all of your muscles melt as their voices begin to fade once more. As soon as they round the corner, Keith picks up his pace again with a sudden, sharp thrust that drives all of the air from your lungs at once in a loud squeak of surprise.

Soon, you're moaning once more, letting go of your restraint and giving into the pleasure completely. You can feel it coming on quickly.

Something urges you to look back towards the backdoor. Your eyes widen as you find one of the boys staring at you in shock. He must have forgotten something and come back for it.

Much to your surprise, your embarrassment is accompanied by a rush of excitement. Something about being watched as your professor fucks you behind the movie theater sends your heart further aflutter.

This seems to be the tipping point for you, and you cum. Hard. Your muscles all tighten, squeezing Keith with both your arms and your cunt enough to arrest his movements. Your vision blacks out on you as your eyes roll and your head lolls back. You barely register your professor's grunts of effort as you milk him for all he's worth, clearly trying not to cum inside of you.