You want a blowjob, obviously

The ravishing beauty at your feet clearly wants to serve you sexually, so why shouldn't you take advantage of her astonishing infatuation? Had you just spanked her for some trivial misdemeanour, you would have no hesitation in taking your pleasure in whatever way you fancied, regardless of what she might wish. Is allowing a willing grad-student to go down on you really so much worse than, say, buggering an eighteen year old chit of a girl that you've just thrashed into a sobbing wreck? Perhaps such encounters are even considered ethically sound in this new world you've created.

With these justifications running around in your mind, you slip your phallus into Imogen's warm, eager mouth. Her sparkling green eyes gaze into yours as she smoothly slides your member down her throat until her nose is buried in your wiry pubic hair and her tongue pokes out to expertly lave your testicles, guiding them one by one into her oral cavity, filling her mouth with your manhood. Her lips are tightly stretched around the base of your cock and balls, but you swear she's smiling at her ability to accommodate you so effortlessly.

She hums quietly, the vibrations sending pulses of pleasure through your cock as she rolls her head from side to side so that the sides of her throat massage your shaft, then she slowly pulls back, sucking hard until your plums pop from her lips. When your cock-head slips back out of her throat, she swirls her tongue around the tip, stimulating your frenulum expertly before diving back down the full length.

As she repeats her skilful ministrations, she pulls down the top of her dress, wriggling out of the sexy uniform to give you visual stimulation to go with the tactile encouragement she is providing. She takes you deep into her gullet once more, one hand cupping her perfect bosom while the other reaches out to gently caress your spit-soaked nut sack.

You moan with growing anticipation, your student's movements speeding up, intent on taking you to the pinnacle of ecstasy. You dig your fingers into her silky black hair, taking charge when you feel yourself nearing the peak, slamming her head up and down your throbbing erection until you begin to pump wad after wad of your salty seed into her waiting belly. Imogen sucks the last drops from your dick as it softens in her mouth, her tongue still massaging you until the end.

When you push her away, the tip pops past her crimson lips and she smiles in happiness. "Thank-you, Professor," she beams at you, "may I serve you in any other way? A massage, rimjob, help getting changed for dinner?"

You sit back, trying to catch your breath after your exertions. That was without doubt the most skilled and enjoyable blowjob you have ever received. With only a few more minutes before your dinner is ready, you expect you'll only have time for one more activity before it's time to eat.