"just a classmate"

"That's just a classmate who probably saw me leave school," you reply to Sandra.

"Don't tell me you're hiding from your girlfriend." she teases.

"No. I don't have a girlfriend," you say, shaking your head. A slight grin shows on Sandra's face as she mentally takes note of the fact. "I bet you had many boyfriends when you were in college." you add.

"Why do you say that?" she asks.

"There's an air of confidence about you, and that penetrating look in your eyes that says, 'I know what you're thinking' coupled with that disarming smile that says 'try to get me' make your both mys..."

"Stop talking and help me out!" she says impatiently.

"How do I help you?" you ask, moving closer towards her side.

"You could fuck me, or stimulate my clit with your tongue!" she whispers, grasping my cock through the fabric of my trousers.

You shake your head. "No. That would contaminate the sample." You hand her the plastic bottle for her pussy juices.

She positions the bottle slightly below her pussy and resumes fingering herself. "How about just hitting my throat with your hard cock?" she says. "It's like a trigger for me!"

"You want what?" you ask, unzipping your trousers and pulling out your hardening member.

"I want you to ram your cock hard down my throat... And don't be gentle. It really gets me off." she says as she hungrily devours your cock with her wet mouth.

Following her instructions, you grasp the back of her head with one hand and start pounding into her mouth. Her eyes start to water so you slow down a bit.

She shakes her head and momentarily disengages her mouth from my cock. "Don't show pity. Fuck my mouth hard!"

You resume fucking her sloppy mouth and gradually increase your pace. Her choked scream indicates the onset of an orgasm. You pinch the tips of her nipples just as her juices squirt out and fill three-fourths of the plastic bottle. You continue to fuck her mouth harder as you approach the point of no return.

"Would this be enough?" she asks, after taking your cock out of her mouth and presenting you with the bottle of her juices.

Your cock slightly deflates as you retrieve the bottle. "This would do," you say, tightening the bottle cap.

"I want you in my pussy this time!" she says hastily as she shifts her position towards you.

You thrust your cock into her drenched pussy and rapidly reach your point of release. However, you hear from behind you the sound of a door slamming shut.