Her ass was so tight, Harry thought he might pass out from the pleasure, but standing behind her, her bent over the desk she gave lectures and homework from really set Harry off, making him fuck her with increased gusto.
"Fuck, fuck, fuck," Harry repeated over and over as he fucked her ass, watching her cheeks ripple as he grabbed her by the hips and really let her have it. He was a mindless animal, fucking and unable to do anything but fuck at this point, living for the tightness and heat of her hole and the utter filth that spilled out of her mouth.
"Oh merlin, you've got such a big cock, bigger than my fucking husband's! He doesn't have that cock, doesn't eat my pussy, won't fuck me in the ass, FUCK!" she yelled.
"He won't? Fucking why?" Harry grunted, unable to imagine not wanting to fuck her bountiful and wonderful ass, pounding even harder into her at the thought.
"He thinks it's dirty, fuck, keep going like, right there, right there, FUCK! He thinks it's dirty, he doesn't understand that it's so amazing because it's so fucking, fuck, fuck, fuck, DIIIIIIIRTY, FUUUUUUUUUUUUUUUUCK!" Professor Sinistra shouted, bucking and cumming again, her ass squeezing his cock almost painfully. It was such an exquisite blend of pleasure and pain that his balls pulled up, firing another explosive set of cum blasts up her ass.
Harry collapsed onto her, both of them pressed into the desk. Weakly, Harry kissed the back of her neck, his hands traveling to her breasts, stroking them softly. She giggled slightly, turning to kiss Harry. They made out for a while like this as his cock softened.
Finally, sighing, Professor Sinistra said, "We need to get out of here. I have a staff meeting I have to go to in a half hour."
"That'd probably be a good idea," Harry agreed. They both stood up, a torrent of cum spilling down her leg as his cock popped out of her ass. She pulled a box of tissues from her desk, and together they did their best to clean it up.
Her voice sounding like a person who'd just sobered up, Professor Sinistra said, "So, I would appreciate it if you used discretion about this encounter?"
"Of course. I wouldn't want to get you in trouble," Harry said.
"I'm glad we agree about that. There are a lot of people who wouldn't approve of what we just did. Not the least of which would be my husband," Professor Sinistra said.
"I'll keep it a secret. I swear," Harry said.
Professor Sinistra talked to Harry as they both got dressed. "Now, before there is any other awkwardness, I must get out of the way that this in no way will affect your grades. So long as you continue to be the excellent student you've always been, you'll do fine, but if you slack off, I won't go easy on your grades just because you gave me three mind-blowing orgasms, do you understand?"
"Yes, Professor Sinistra," Harry said, smiling as he repeated the words that had gotten her going while they fucked.
"I'm glad we understand each other, then. Beyond that, while I had a great time, I cannot promise that this will become a regular occurrence. I've never done this with a student before, I don't intend to make a habit of it, and I don't wish to lose my job, so discretion will be of the utmost importance," Professor Sinistra said.
"I understand."
Harry got fully dressed, shaking his head and completely unable to wipe the idiot grin from his face.
****
"Harry Potter?" a soft voice asked from behind him.
"Yeah?" Harry said, turning around and seeing Luna Lovegood.
"Madam Pince would like to see you. Now," she said.
"Am I in trouble?" Harry asked.
"She wouldn't have sent me to look for you if you weren't," Luna said.
"You serious?" Harry said.
"Yes," Luna said. "Come with me, please."
Luna took a few steps away, leading Harry toward the library. When Harry didn't follow, she turned to him and gave him an impatient wave.
Why would Harry be in trouble with Madam Pince? Overdue books? Even if he were, which he wasn't since he always returned things on time, that was just a fine. They were on normally good terms, and I always respected the library, and...
Well, there was that time a few days back when Harry and Daphne had gone down on each other in the stacks and... oh fuck.
"Okay," Harry said, nervously following Luna to the library.
Harry had never really been in trouble at school, partly because he always tried to follow the rules, but mostly because he never really did anything worth getting in trouble over.
So, while Luna guided him to the library and Madam Prince's office letting him in and closing and locking the door behind them, Harry was fantasizing about what was going to happen..
Madam Pince was waiting for them at a table. For a woman in her late forties, she usually looked rather luscious, and today was no different. Her shoulder-length hair fell onto her dark blue sweater that held back a phenomenally large pair of breasts, and her equally dark skirt was short as ever, showing off her black stockinged legs and heels nicely.
The way she leaned against the table, casually drumming her fingers on a polished wooden box sitting on the table, made Harry feel like he was being walked ever closer to his execution.
"Hello, Harry," Madam Pince said. "Please, take a seat."
"Yes, Madam Pince," He said, wanting to get this over with. He grabbed a chair and sat facing her.
Madam Pince just stood considering Harry, still drumming her nails on the wooden box. Was he supposed to talk first? Was she? Was she just going to stand there staring at Harry
When Madam Pince finally spoke, she didn't exactly take the angle Harry was expecting.
"Would it surprise you, Harry, if I told you that the school library didn't get very much respect?" Madam Pince asked.
"Y-yes?" Harry said, hoping that was the right answer.
"Then you're an optimist. That's not a bad thing, but not very productive either. No, this library doesn't get much respect. The school board doesn't care about us outside of the barest minimum of attention to make sure we have the textbooks the students need which are decades older than Professor Dumbledore" Madam Pince said.
"I'm sorry to hear that, but..." Harry nervously said. Harry almost gulped down the last words, not sure if he should say them, but then he added, "...what does that have to do with me?"
"Let her finish," Luna said.
Madam Pince put her hand on the younger girl's wrist. "Now, now, Luna, that's not very polite, is it?"
Rocking uncomfortably back and forth on her feet, Luna said, "I'm sorry, Madam Pince."
There was something strange in the way they looked at each other, an almost silent, animalistic communication passing between them.
"We'll address your interruption later," Madam Pince said, tersely.
If she knew she was being punished, Luna didn't let it show with the slight smile that crossed her lips, "I understand."
Madam Pince continued, "The greatest disrespect this library receives, though, is what the students do inside of it. They think because the library is dark and private that they can take drugs or worse, that they can use it in their private liaisons..."
She trailed off, staring Harry down, letting him stew in what he'd done.
"Harry, I can't begin to say how deeply disappointed in you I am," Madam Pince said. "I thought you, of all people, would understand all the hard work I do to make this place into a temple of learning. I never imagined that you would be like the others, disrespecting the library, disrespecting me... like I said, I'm disappointed and while I am upset and disappointed in you for disrespecting my library by messing around with Daphne Greengrass without even being so kind as to ask for my permission, you aren't in trouble. You're quite free to go at any time without any fear of repercussion, but if you decide to stay... we can use this as a learning experience," Madam Pince purred.
Though by this point he'd relaxed and had a good idea where things were going, it didn't hurt to ask, "What kind of learning experience?"
"The kind of learning experience that begins with you standing up and taking off all of your clothes and letting us get a good look at you, to see if you're all the rumors make you out to be. After that, it might get a little messy, but you're intimately familiar with this particular brand of mess, aren't you?" Madam Pince said plainly.
He thought it might've been that kind of learning experience, but it was nice having a confirmation. Madam Pince looked at Harry with what might've been hunger, while Luna's face had equal parts of fascination, skepticism, and discomfort on her face. That this might be an opportunity to be with the both of them was a surprising one; Harry had been with plenty of girls, an older woman, and in more threesomes than he could count, but never with an older woman and a girl his age. The prospect was equal parts intimidating and interesting, especially with Madam Pince effectively a teacher.
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