You agree

Feeling trapped and betrayed, but also feeling incredibly aroused, you nod acceptance. You've always had more than a bit of a crush on your professor, and at least he's going to help you, and he's not a bad looking man, and besides, you're feeling a growing heat in your pussy that needs male attention, and needs it bad.

"That's my girl," he smiles, standing up and walking to your side of the desk and placing a gentle hand on your shoulder. "I've always admired you, Lisa. Particularly when you sat in the front row of my class and wore those short skirts. Every time you crossed your legs you made me hard, you little minx. In fact, you've done it again." He gestures to a growing bulge in his pants, as his hand slides down your top to stroke your full ripe breasts. You give a soft little moan at his touch and reach out to fondle his cock through his pants. Without being told, you unzip him and pull his cock free. It's not particularly long, but it is very thick, with ropy veins bulging along the shaft. It looks delicious, and without thinking you suck the head into your mouth.

He gasps, holding your hair as your head bobs on him. "You don't have to do that, Lisa. Our deal was a fuck."

"I know, I want to. This is an extra. I love sucking cock," you murmur as your pull him out of your mouth for a moment, licking the tip with a swirling tongue, then gobbling it again. You feel your panties drenched with your moisture, your arousal a fire within you. More than anything you want to devour your professor's cock and drink his hot come, but you promised a fuck. But his cock is so tempting and you are so hungry for it. Your mind swirls with indecision as your pussy burns and your mouth sucks the hot pillar of meat.