You fuck her.

The blonde in the front of the class raises her hand. "Teacher, I think I speak for the entire class when I say we'd like to see them 'go at it.'."

The other girls nod.

Without thinking about it, the hand that's been grabbing Samantha's butt slides up and then under her panties, enjoying the smooth flesh of her ass. She bites your neck gently but eagerly as you thrust against her again.

Diana shrugs helplessly. "Well. Ok. Well, can you two at least do it in such a way that the class can see how it all works?"

You laugh at the absurdity of the situation, and Samantha starts cracking up as well. As she laughs, she squirms out of her panties, letting them drop to the floor. Stepping away from you, she turns towards Diana's desk, leaning against in so the class can see her naked body in perfect profile. She looks at you with sparkling eyes. And then she pats her ass invitingly.

You walk up behind her, running both hands up her waist, along her ribcage, and then curving to the front to take her breasts into both hands. She gasps as you firmly bite her neck.

Your cock is pressed against her perfect ass, but she reaches back and grabs it, tilting her pelvis to line you up with her pussy. As soon as the tip of your head feels her moistness, you moan, grab her breasts more firmly, and then push into her.

She cries out, arching into you, turning her head to try and kiss you but just gasping again instead as you pull back and thrust a second time.

The two of you quickly find a rhythm, little wet noises sounding as you push in and in to her, hearing her gasps and your own pleasure as her tight, hot pussy wetly wraps around your cock.

Your eyes start wandering the room as you thrust. You notice the girls are mesmerized, flush, some of them look like they are barely restraining themselves from touching themselves as they watch. Even Diana is staring, breathing shallowly.

You start to feel your pleasure build in your balls, and you thrust faster. Samantha's cries grow louder and louder and suddenly the stop as she arches her back soundlessly, her eyes shut, her mouth in a perfect "O". Her pussy clenches around you as she comes, doubling your own pleasure as you thrust even harder into her.

Suddenly everything goes white, and you start blasting your load into her, matching her silence with your own satisfied grunt. She bends over and slaps the desk in satisfaction, finally letting out a loud sigh as you finish coming. As you look down at her perfect back, her long black hair falling everywhere, you realize that you really were in the right place at the right time today.