Cum down her throat

You can barely stand the sensation of her warm breasts massaging your cock. You can feel your balls tighten up as she laps at the head of your cock. You grab her hair again, and jerk her head backwards, while standing up. She stares up at you from below, breasts held together, as you take hold of your cock and stroke it over her.

"Yes" she moans as you hold her head still, cock hovering just above her mouth. "Give it to me professor. Cum for me. Wherever you want it I'm yours. Your whore who needs your seed." She squeezes her breasts up for you.

"Open your mouth" you command, and she does. Lips wide and glistening as she offers herself up as a receptacle. Her eyes cross slightly staring at your cock. Sensing the end, you pick up your pace for a moment before jamming your tip into her waiting mouth. Days worth of pent-up semen spill forth, filling her mouth as she desperately tries to swallow it all. She gulps and gulps as you fill her up, and some of it inevitably spills down onto her tits and thighs.

The last image you have before blacking out is her lifting her breasts to her mouth, lapping up your cum.