Right.

You stumble to your knees, as Ms. Devlin takes her place on her desk again. Watching her lay herself out, the picture of womanly perfection... You feel a bit of your strength come back to you, your lust encouraging you to ravish her while you still had the chance.

Seeing as how Ms. Devlin very explicitly wanted you to do the same, you saw no real reason to deny your lust's desire... Except, maybe, in being a bit more intelligent about it than the crude rutting beast you discovered hiding in your heart. Ms. Devlin had taught you for a reason, after all.

Gently clasping her breasts in your hands, you began to explore Ms. Devlin's infernally perfect breasts, her perfect red skin providing a glorious contrast to her dark brown areolas. You'd love to take your time and just drink in their wonder, but you knew that you were on the clock - Ms. Devlin wanted you to make her come now, and she wouldn't hesitate to fail you if you took your sweet time about it. So rather than just stare at her perfection, you commanded your hands to move, indulging in that soft gentleness that she had practiced with you. Her breasts felt amazing in your hands, just as they had when you were kissing before; you were pretty certain that hand-orgasms weren't a thing, but you were confident that if this is what every day with her was going to be like, her soft breasts filling your hands... You would still find yourself satisfied.

It wasn't long before you were rewarded with a sigh... But sadly, it wasn't the type of sigh you had been hoping for.

"Mediocre," Ms. Devlin announced, "Below average. Failing to meet par."

You had never felt so crushed in all of your life. You owed her so much, and you'd just... Failed? So simply?

"What did I do wrong?" You beg, as tears filled your eyes.

"I showed you before, didn't I?" Ms. Devlin replied, displeased, "Staying with that pace is just going to start tickling, and then get irritating. And I'm more sensitive than most women, so it's like you're tickling me with feathers. That can be hot - for a bit. But you have to get more serious with it!"

She takes your hand with hers, and starts digging your fingers roughly into her breasts, as she gives a proper sigh after. Having been forcefully corrected, you pick up the new rhythm, alternating between roughly groping her and playing with her nipples. Comparing it mentally to what she did with you... This was quite a bit rougher than she was with you, but the pleased smile she was giving suggested she was enjoying it all the same. Well, she was a demon, right? It'd probably stranger if the same things worked with you both.

Still, this was just the appetizer; her warm, inviting pussy was starting to drip with a blackish liquid, and you knew that you'd promised her more than just breasts. Was it time to move on to the main course?

"Ms. Devlin -" You start, before being cut off.

"Please, my pretty little student, in here, you call me Mistress," The demoness interjected, "In the rest of the school, address me as you must, but in my office, I wish to be properly respected!"

That was... That was completely understandable, right? In the outside, she had to pretend to be a boring, normal professor, but in here, there was no need for such petty deceptions. In her own lair, it was only natural that she'd want to relax a bit, without you bringing up such unpleasant reminders.

"Of course, Mistress," You reply, "My apologies for presuming to use your name."

She gives you an imperious nod in return - somehow, despite her position and your current activities - as you belatedly realize you still had to ask your question.

"Mistress," You try again, "Should I move on to your lower portions now, or would you prefer that I continue?"

"Hmm..." Mistress pondered, "I wonder, should I award you extra points for clear communication? Or penalize you for needing a hint on your exam? ...Both, I think. Yes, both will do."

You continue your kneading and teasing as you fret about your grade - and about the lack of clear direction.

"Switch it up a bit," Mistress commanded after a pause, "I want to examine your oral technique, on my breasts."

With barely a nod, you lower your face to those inviting mounds, and began kissing your way around her breasts. You didn't know if it still applied after that much rubbing, but you remembered the technique she had tried to show you before you so rudely interrupted her. She didn't scold you again, so maybe it was fine? She didn't look that into it either, though...

Deciding to cut it short, you moved on to the technique that worked well on you - kissing her nipples, mixed with gentle bites for extra stimulation. You're rewarded with a sigh of pleasure in return! It worked! And... A little bit more. Because as you nibble on her breasts, an intoxicatingly sweet liquid starts to flow onto your tongue, and you suck it down greedily even as you wonder what it could be. It couldn't be milk, right? Or else, she'd have started leaking earlier, from your hands.

What exactly it is becomes increasingly irrelevant, however, as you begin to get drunk off of her fluids. Your thoughts begin to grow hazy, and you find it harder and harder to link your thoughts properly together.

"Oh, darkness, I completely forgot about that..." Mistress complained, as her little sounds of happiness were interrupted with a complaint given voice, "Just start kissing your way down to my sex, my little student. We don't want to burn out your brain before you're useful."

Mindlessly, you follow your Mistress's orders. You'd have liked to have feasted on that drink for a bit longer, but Mistress knew best, right?

As you reached her sex, you struggled to remember her lesson's through the intoxicating fog. You started with her sex, passing through her folds and moving your tongue around... But you ran into a problem that you don't think was related to your drunkenness. Your tongue... Just wasn't as long or as flexible as hers!

"Don't worry about it, my pretty little student," Mistress laughed, obviously noticing your distress, "Just do what you can with that stubby little thing mortals are stuck with. It will still feel decent."

You were so disappointed with your human limitations... Mistress deserved the best, and you just couldn't deliver! But still, you did your best - remembering, at least, that you should strive for precision over enthusiasm. Struggling your best to match your memories, you try to move your tongue in the patterns you remember... At least, the ones a mortal could match. You feel like a miserable failure, but from the appreciative sighs you receive, you were at least doing better than your first attempt.

But this was only half of things; switching your efforts up, you turn your attention to her clit, reaching out with your tongue. Remembering your own experiences with it, you try to be gentle to avoid overstimulating her... But she clearly doesn't appreciate your caution, as she practically jams herself onto you. This was just like the breasts all over again, wasn't it?

Well, you won't be a slow learner here! Abandoning subtlety, you start to suck on her until you feel her shudder in your face, and you start to lick your way through her sex again, to a purr of contentment.

"Good, my little student," Mistress praised you, "I'm glad to see your promise shine. No need for further remedial lessons just yet, then."

You felt your heart swell with pride at her words. You were a good little pussy-licker! Maybe you'd gotten a late start, but you knew you'd catch up with effort!

After a couple of minutes, you switch your attention back to her clit, then back to her pussy again, getting a steady rhythm going - and were soon rewarded with a second orgasm, much to your satisfaction. If you were being honest with yourself... You might actually enjoy this more than being on the receiving end, as you greedily gulp down her fluids. Feeling great felt great, to get tautological... But this had a special appeal of its own, the satisfaction of making such a wonderful woman squirm with pleasure in your arms.

This wasn't love, obviously, but it was definitely lust; you'd dreamed of doing these kinds of things with a guy before, and now that you'd felt it firsthand... It was so much better than you'd ever imagined, of feeling every little twitch and hearing every little moan that your imagination had failed to capture. Maybe it would be even better with a true lover instead of this lusty transaction, but you couldn't imagine how. Or maybe with an incubi instead of a succubus, but... Well, that seemed pretty doubtful at the moment as well.

But, all good things came to an end, and with Mistress's fifth orgasm... She called a close to things. You were tempted to get one last lick in, to convince her to go another round, but... Her words were absolute, right? Fuck.

"Well, you've lived up to your end of the deal," She nodded to you as she stood, "I won't pretend it was the best sex I've ever had, but you're a decent learner. With my tutelage, you'll probably be above average by the end of the week."

You're not entirely certain how to take that. You're glad that she's praising your improvement, but... You want to be more! You want to get to great by the end of the week!

...Well, it is only a week. Maybe you're getting a bit greedy. But you're supposed to be a bit greedy, right? Mistress likes it that way.

Meanwhile, Mistress is studying you closely, studiously ignoring your internal conflict.

"...Yeesh, that ambrosia really pushed you over the edge of where I was aiming," Mistress mused, "There shouldn't be any lasting harm, but... Darkness, you're going to be zonked out of it for a few hours, at least. Maya, where were you going after this? Did you have any urgent plans?"

"Not at all, Mistress," You dutifully reply, "I was going to meet up with Taylor and Wyatt to discuss the outcome of our meeting, and then, if possible, go straight to the Dean with our evidence. Not that I'd do that now, obviously."

"...Right," Mistress replied with a sigh, "Go to the cafeteria instead. Have a nice, big lunch, drink plenty of fluids - not to excess, make sure you don't injure yourself or I'll be very cross - and read this letter once you're feeling more sensible. Then go and meet with your little friends."

"Of course, Mistress," You reply dutifully, your next steps planned out for you.

What a caring Mistress you had.