You don't. But then things get weird, and she sweetens the deal.

You wish that you could say that you responded to her offer with dignity. But honestly, you couldn't. It would be better described as a panicked five minutes where you spouted nothing but complete drivel, including a dozen different mutually exclusive "explanations" that ranged from stupid to completely nonsensical. Eventually, she just cuts you off, annoyed.

"Darkness, will you shut up!" Ms. Devlin scolds, "Do you honestly think a succubus would be upset about this? You were doing everything right! You used sex to get what you want, you were deceptive in your approach, you intended to **** me to get what you wanted... Yes, you're a bit of an idiot who screwed everything up, especially with how you kept glancing at the purse, but you were showing great promise! I can work with that. It's a lot harder to teach the right attitude than the right skills."

You... Don't know how you feel, being praised in those terms. Well, you should feel happy that she's letting you off the hook at least, right? Except, you're pretty sure earning her attention in this context might not be any better.

...You had been doing the right thing, right? Yes, you tried to trick Ms. Devlin into sleeping with you to get her fired, but she was an evil demon using sex to manipulate her class; you were just using the tools you had available to do the right thing. It wasn't... What Ms. Devlin had implied. You were just using sex as a tool, that was all.

"...It still failed, though," You reply, sulking, "The first time I ever tried doing anything like this, and I completely blew it."

"Well, obviously," Ms. Devlin replied, rolling her eyes, "If it's something important, you should rely on what you're good at, not gamble on something completely new. Sex isn't a get-what-you-want-free card, no matter how effortless we make it look. If you really wanted me fired, you should have put your essay-writing skills to good use, and written to the donors about why I should be fired. They'd have leaned on the Dean, and it wouldn't have mattered whether you had any 'evidence' or not. Well, whatever. We'll just have to teach you how to be better at this sort of thing for next time."

Fuck, she was completely right, wasn't she? Why hadn't you thought of that! The Dean had told her about how the donors were the real problem here, and she was also concerned about the trouble protestors could cause. If she'd gone to the donors about why this particular demon was such a problem, she could have flipped them into being her allies, and she could have stirred up some protestors of her own.

You should have just gone to Ms. Devlin to begin with, and asked her how to approach this problem. She was way better at these kinds of manipulative games than you were. She might suck at teaching Comparative Theology, but she was great at practical life lessons.

"Next time?" You ask.

"You're my favorite student!" Ms. Devlin replies, "I'm not just going to abandon you because you failed once!"

You... Were? You try to think back through your interactions with each other, but it's all so muddled and foggy. You were always so busy being aghast at what she was doing or how she'd made your class into a farce, you couldn't really remember how she'd ever talked to you. You wished you hadn't spent so much time hating her; it was making it difficult to focus on what she was saying now.

...Uh, wait, wasn't that a really big clue in answering that question?

Your narrowed eyes don't miss her attention, and she nods approvingly.

"Yes, there must have been dozens of your classmates who tried to get me fired one way or another," Ms. Devlin replied, "Or just came here to shout in my face! Always so boring about it, too, as though I hadn't had to deal a countless number of little shits who couldn't accept a failing grade when their heads were full of mush, just because their daddy had always bailed them out before."

"You, however..." Ms. Devlin purred, "You dealt with this just like a succubus's student should have. The first hint of promise in this shitpile they call a school. You might have failed miserably, but I'm far past being picky at this point."

You... Had promise. You felt your heart flutter a bit as she said that. You had promise. A teacher's praise - no, more than that, the praise of a supernatural being - filled your heart.

You had promise.

Your parents loved and cared for you, and your friends supported you, but you'd always felt... Pretty normal. You were in a good school, but you knew your classmates were better than you. More than that, most of them had chosen degrees that would go on to earn them high-paying jobs; you... Well, you had your own hopes, but most people joked that you'd be the best-educated barista they know. The more serious ones said that they expected to see me working as a bank teller if I didn't wise up. But right here, right now, there was one person more important, more influential than any of them. And she was telling you...

You. Had. Promise.

"But I don't want to raise a viper in my bed, you understand?" Ms. Devlin traced a finger across your cheek, "You adore me now, but who knows what that might look like when you cool down a bit. So, let's make a deal, yes? Every day for the next week, you'll come to my office and eat me out. Every day, I'll ask you to perform one more little errand for me - either you do it, or you offer me up a shard of your soul to get out of it, your choice. And after seven days, I'll give you an HD video of our little escapades - or even a few of me with some of your classmates, if you want. If you still want me gone so terribly bad, you can go ahead with your silly little plan, and take the videos to the Dean. What do you say?"

You struggle to think through the distraction; this was important. You couldn't fuck this up too. But it all sounded pretty good to you... She was offering you a dagger aimed at her heart, her personal attention in teaching you, and you got to eat her out. What more could you want?

...Wait, no, there was one more thing you needed to secure. One more detail that was important. You could fail at the rest of this, but you couldn't fail here.

"One more condition," You reply, "You leave Taylor alone. You don't take her soul, you don't touch her, you don't even talk to her. You can do whatever you want to me, but she doesn't end up sitting here, eating you out."

Ms. Devlin raises her eyebrow, and for a moment you think you've managed to anger her... But instead, she just gives you an amused grin.

"You really do care about this Taylor, don't you? Very well; I will stay away from her," She says, before her grin turns cruel, "But I am only responsible for my actions, you understand. Anything that you choose to do... That's on you. And while I pledge not to seek her out on my own, she's still a student; if she comes to me, I'm obliged to answer. No touching involved, however, as per our agreement... No matter how she might beg for it."

You nod in contented agreement, as your thoughts cloud over, gazing at the luscious creature before you. Taylor had to be kept free from Ms. Devlin, because Ms. Devlin was a dangerous succubus who manipulated people with sex; Taylor would be putty in her hands, and could be lead down all sorts of dangerous roads. If you ended up having sex with Taylor, well, you were human; you couldn't hurt Taylor like that, so she'd be just fine. Ms. Devlin was the only dangerous one here, and she'd promised to leave Taylor alone. You'd succeeded. Taylor was safe. She'd promised.

...You felt like you'd missed something important here, but your thoughts were chased away by a very delicious looking clitoris.

"If we have all the details sorted out..." Ms. Devlin said, looking down at you, "Let's seal this agreement with a kiss. Your tongue, to my pussy, just as you first proposed."