Dinner would end rather quickly, with Harry, the twins, and Veronica exchanging bits of conversation, while you silently tried your best not to react to the way Harry would occasionally shift in your lap.
From moving side to side, to grab things, to bouncing up and down, when she was particularly frustrated, and even pushing down, practically grinding her cushiony ass against you now raging erection, whenever one of the twins would playfully try to move her fom her perch.
You were sure it was all accidental, but from the way she would occasionally look back at you, you were beginning to consider that maybe she enjoyed the way you reacted.
Before you could properly figure that out, however, Dinner had finished, and the twins had headed off, dragging their sister with them. Harry headed back to the dorm, unable to accompany you on the next event.
Detention.
On the first day of school as well.
You could almost feel the horror your mother and father would feel if they knew. It was why you hadn't told them. Harry had actually tried to convince you to skip it, but you were steadfast.
Professor Snape was a responsible and kind teacher, you refused to disappoint her further by requiring her to chase you down for a detention.
So, you headed down towards the potions wing, passing students, mostly Slytherin, on the way down. You received a few side eyes, but no one stopped you.
Eventually, you reached the doors to the potions lab, and as you raised your hand to knock, you were cut off by Snape's voice, echoing from within.
"Enter, Granger."
The door in front of you clicked, drifting open on its open. You pushed past, only turning as it closed shut behind you.
The potions lab was dark, darker than it was during class, and from what you could tell, the only real light in the room came from the front.
A small lantern sat on table, next to it was Professor Snape.
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She had a pair of red goggles on her head, and was carefully watching the bubbling pink liquid. She gave a glance up at you as you approached.
"Good, you're here. Put on some goggles and come closer." She gestured over to a nearby desk, where a pair of goggles sat, waiting. Picking it up and pulling them over your hair, you approached Snape.
"Eh, is this my detention, professor Snape?" You asked, glancing at the various ingredients on the table, and the bubbling cauldron. Helping an expect potioneer in their craft honestly sounded like more of a reward than a punishment.
Evidently, Snape thought so to, as she made a few finishing touches, before backing away from the cauldrons, which had calmed to a dull simmer.
"Not quite. Most of the brewing is beyond your current skill level. I do, however, require a willing test subject for some of my more tame potions." Snape gave you a somewhat concerning smile.
"I assured you, it's absolutely safe."
That… was not what you had in mind for your detention.
Frankly, out of everything professor Snape had ever done, perhaps this was the bit you were most uncomfortable with.
Human trials, at least in medicine, only happened after numerous other tests had been completed.
You squinted, considering.
There was a fine line between acceptable risk and stupidity.
Snape, seeing your hesitation, tried to assure you further.
"I have ensured that none of the tests will have any… deleterious effects on the human body. At most, I want to observe," here, she got an odd smile, "the intensity, of the brews."
You considered for a moment longer, before nodding, shooting your professor a smile.
"I'm happy to help, Professor!" You said.
Snape nodded, returning the smile briefly, before leading you over to another table, where two chairs were already set out.
Oddly enough, you could see as well, what looked like a folded change of clothes on another chair nearby.
Wonder what those were for.
Snape sat down across from you. On the table were three vials. A tall one filled with a green, viscous liquid, a smaller one, with an yellowish hue, and finally a tiny vial, filled with a pink, misty substance, it appeared seal quite tightly, and vibrated every once in a while.
Snape pulled out a sheet of parchment, staring quite intently at you.
"I would like for you to try these three potions, then describe the effects verbally to me." She said. "You are free to start with whichever you choose."
You studied the vials in front of you, considering their hue, the way they acted, and the amount in each vial.
"Does the color or appearance of the potions inform me at all of the effects?" You queried, considering the potions available.
Snape shook her head, before pausing.
"The record effects of each potion are not full understood. As far as I am aware, there is not any visual tells for their effects, but there could be some that I am not aware of." The answer was surprisingly scientific, although you supposed that among the various schools of magic, potions would be the most closely related to modern science.
With a slow hand, you picked the green vial. Snape quickly made a note as you uncorked the liquid, and a strong scent not unlike bourbon hit your nose.
Raising it, you gave Professor Snape one more look, before downing the cocktail.
While it smelled like bourbon, your mind couldn't help but be drawn to fruity sports drinks, as the concoction slide down your throat. It was more like a syrup, than a liquid, and you held the vial bottoms up for a moment to ensure you had gotten all of it, before placing it back down.
"When should we be seeing the effects, teach?" You asked, playing with your hands and shifting uncomfortably in your chair. These pants were evidently a bit to small for you.
Snape eyed you for a moment, quill raised.
"They should take effect immediately, are you feeling any different, Mr. Granger?" She asked, looking you up and down.
You tugged at your shirt, untucking it. You tried to figure out if you were feeling any different than before, but all you could really feel was how tight your shirt was as you stretched.
She jotted down a few things, before glancing back up at you.
"Let me know if you notice anything, Granger. On to the next potion."
The way the teacher moved, caused her breasts to strain against her shirt. If she leaned back just so, you could ever so briefly see the outline of her nipples against her shirt. She wasn't wearing a bra.
A goofy smile crossed your face.
Nice.
"Mr. Granger!" Snape snapped, bringing your gaze back up to her eyes.
Snape looked a little longer, seeming to notice something. She jotted it down, before looking back up. She seemed to be almost drooling at something. You looked down to try and figure out what she saw.
Unable to tell, you turned back to Snape. She seemed to be blushing, and the hand that was holding the quill was now under the table doing, something, that you couldn't see.
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"Should we move on, teach?" You asked.
Snape blinked, turning towards you, before quickly withdrawing her arm, wiping her mouth with her sleeve, and then wiping her somewhat damp hand on her shirt, before picking up the quill once more.
"Y-yuh, yes! Mr. Granger, please choose the next potion."
You considered your options. Perhaps, if you were more intelligent, you might wait for the effects of the first to wear off, whatever it was. But honestly, you felt pretty good right now.
Whatever came next, you could take it.
You looked over the remaining two vials, even as Snape watched, now looking a bit more flutered. They seemed just a little bit smaller then they had at the start, and as you reached forward to grab the yellow bottle. As you did however…
"Whoa…" You uttered, seeing you bicep. It looked larger than it ever had before. It looked like that one friend of yours, Stan, who swore by creatine.
You flexed it slightly, marveling at the way the muscle bulge.
A throat was cleared. You looked over, to see Snape looking at you with a flushed, but slightly impatient look.
"Eh, sorry teach'." You muttered, withdrawing the vial fully, and uncorking it.
Without much, or really any thought, you tilted the vial back, letting the watery content fall into your mouth.
There wasn't nearly as much as the green vial, but as you drank, you couldn't help but note that the taste seemed… familiar.
Another sip.
Yep.
That was Apple Juice.
You looked over at Snape to see if she knew about it, but instead the professor seemed poised, excited for any potential change. After finishing the bottle, you placed it down, and began waiting for whatever results would come.
And waited.
And waited.
And waited.
At the five minute mark, you cleared your throat.
"Eh, what was in that one, teach'?" You asked. Snape was wrinkling her nose in confusion, flipping through papers, muttering to herself. Eventually, she turned back to you.
"Don't mind it, maybe that one will take effect later. Last potion!"
You looked towards the pink bottle on the table. Snape, seeming excited once more, slid it towards you.
You glanced down, a thought echoing in your strangely quiet head.
"Should we be, waiting for this to wear off?" You gestured towards you abs, ones that were much more defined than they had been this morning.
The professor waved her hand.
"Cease your questioning, Granger, last potion, so we may both get in bed."
You paused.
"You mean go to bed?"
Snape gave a perverted sounding giggle. It was odd to hear such a noice from your normally straight-faced professor.
"Sure."
You grabbed the pink vial. Considered it's contents, before downing it in one swig.
The liquid, you found, didn't taste much of anything. Instead, it felt as if you had stuck a air compressor in your mouth, with everything drying out quickly, but temporarily. Quickly, your mouth flooded with saliva, and you felt mostly normal.
You looked over at Snape, who had leaned back in her chair, as if readying her body for something, but when you didn't dive out of your chair and tackle her, she seemed to slump, and a depressed look came over her face.
You waited another few minutes, trying to see if there was any effect, before impatience got the better of you.
"What was that one meant to be?" You asked your professor. To your surprise, rather than the deflecting as she had done before, Snape answered your query quite promptly.
"The last one was a modified truth sureum, meant to make the one who imbibes it "act" truthfully. To do what it really wants to do." She said, even as, slowly, she began standing up. She continued talk, as if unaware.
"I wanted to see if you were actually interested in me." She continued. "But since you didn't even twitch, it means that I'll go through another year of my life, wasting away, alone. I'll probably give you a good grade, anyway." She sighed, even as, reaching your side of the table, she stopped, fiddling with her belt, pulling down her pants, and hopping on the table.
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And spreading her, evidently, utterly sodden twat, for your viewing pleasure. She bit her lips as she did, a line of drool running from her mouth as she groaned at the sensation of even touching her sensitive lips.
"I'm still confused on why it didn't work." She continued, "The only thing I think that could have happened is that it entered into your glands, and is being excreted as a pheromone for the duration of the effect instead.
As she spoke, she began roughly grabbing her own breast, tugging on the nipples through her sheer shirt and giving out throaty moans.
A second later, her own words seemed to hit her, and she looked down at the hand exposing her pink inner flesh, then back at you.
Her face colored.
"Oh!" She squeaked.
You felt your lower body throb.
What you had to do was obvious here.
You had always sought to please your teachers, after all.
You considered yourself a relatively perceptive person. Even as a child, you were able to successfully deduce what Christmas present your parents were getting you, lottery numbers, and even the answers to riddles with only the smallest of clues.
So from the sigh in front of you, you were able to gather, from the various clues provided, the correct course of action.
A cowardly man would likely back away, startled and afraid of the beast in front of him.
An inconsiderate one may have just pulled down his pants and gone to town.
But you were neither cowardly nor inconsiderate. Instead, you were a gentleman.
And a gentleman doesn't dive in without tasting the waters first.
And no, you didn't stutter.
Stepping up to the uncharacteristically blushing and nervous Snape, who seemed absolutely flustered and unprepared for this turn of events, but also entirely paralyzed, unable, or unwilling to move from her current position, legs spread and quim spread.
"I- You- Mr. Granger, what are you- Dear Merlin-" She didn't seem quite certain what to say as you approached, lust, confusion, and embarrassment warring in her eyes as you stopped in front of her, directly between her legs.
As Snape continued to stutter, you considered the height of the table and her current position. Most of the potion tables were relatively high, set so that students could work at them both standing or sitting.
The one Snape was displayed on, on the other hand, was the same one that she used just this morning to hold the sample of students' potions next to her desk. Set just a bit lower than the others, you figured it should be just the perfect height.
The startled noise she had made came from her when your hands, which seemed a bit… larger than normal, came down on her thighs, squeezing them lightly, testing the feeling.
You found them delightfully pliable, making for perfect handholds as you prepared yourself. Almost as if they were made to be grabbed.
"Mr. Granger, I think we both are getting a b-bit- OKNOPLEASECONTINUE."
The rush of words, as well as a full body shiver, and a squirt of juices, came from Snape at the same time as you falling to your own knees, putting your head at the perfect height, and drawing your tongue across her pussy in a long lick.
A second later, you felt her legs wrap around her shoulders and pull you in closer.
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"I, hah, think you aren't quite, hmm, done there, Mr. Granger." Her words had taken on a different tone. A strange mix of heavy desire and giddiness.
You didn't bother responding; while your thoughts were clear, putting words and meanings together felt oddly difficult. Instead, you busied yourself with another task.
Doing your best to please your professor with your tongue.
Going back in for another, you didn't stop at just one, instead using the movement to begin eating her out in earnest, to her intense, vocal, if inarticulate, pleasure.
Her soft thighs sandwiched your head, and it seemed that with every other lick, she twitched and moaned, and you were rewarded with her tightening her legs briefly, and a waterfall of juice sprayed you in the face.
This would go on for an indeterminate amount of time, both the professor and you showing no signs of flagging, until finally, Snape let out one particularly loud moan, and her legs loosened just enough for you to rise as she was recovering.
You wiped your mouth with an arm, meeting Snape's clouded eyes as you did. A moment passed, with both of you considering what the other would do next.
The moment passed, and you and Snape breathed somewhat heavily as you stood there.
Slowly, almost hesitantly, with a look of intense arousal mixed with worry, Snape spread her legs again.
She seemed to be pleading, more than offering.
You wanted to say something kind, reassuring. A part of you didn't like to see your professor looking so desperate, as flattering as it was for you. But higher thoughts, such as those that were beyond you at the moment. The fog in your mind is contending with the intense way your body.
So instead of some grand message about why she should have more value and pride in herself, you chose a simpler option.
"Professor Snape, you are one of the most beautiful women I've ever seen." You said, before giving her your brightest smile, trying to communicate just how genuinely you felt that statement.
Snape let out a quiet gasp, staring at you, before…
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The smile on her face seemed so happy, so utterly happy, as if it was the first time she had ever heard someone say that to her, which had to be untrue.
Before you could try your best to consider to implications of such a look further, Snape seemed to reach her own conclusions.
"Please, Mr. Granger, call me Sylvia." She said, that same smile still stretching across her face, as she spread her legs wider. "Now please," she whispered, "more…"
You were never one to deny a request from a professor, so you stepped forward, hands coming down to your tight pants. The button almost sprang off, and pulling them down was a chore of shimmying, but eventually, you had brought your pants and underwear down to your knees.
You hard-on now swaying slightly in the cold, damp air of the dungeon potions lab, you couldn't help but shiver at the thought of fucking a professor in their classroom.
Something about the idea fulfilled many, many, long-held fantasies of yours.
But first…
"Please, Professor," you said, lining up your metaphorical shot. The tip of your penis brushed against her entrance, and you enjoyed the way her body's burning need warmed you slightly. Snape moaned aloud at the feeling. "Call me Herman."
She didn't get a chance to respond, as you moved your hips forward, pushing your head past her outer lips, and into her impossibly tight depths.
And she was tight, astoundingly so, and as you plunge deeper and deeper into her depths, it felt as if her body only tightened its grip more and more.
It wasn't trying to squeeze you out, far the contrary, instead it felt like your body was desperately trying to bring you further in. Like one of those Chinese finger traps, easy to slide in deeper and deeper, but the moment you try to pull even the slightest bit out, it holds on with a desperation unmatched.
The only thing more distracting than the sensation of her body massaging your cock, was the way Snape's eyes widened, rolling back, and a goofy, pleased smile spread across her face, as she let out a single, long moan.
It was as if he had just given a man in the desert their first taste of water in weeks, and to be honest, she just looked so beautiful as you did so, you couldn't help but take a liberty.
Just as it seemed she might have been getting used to your size, you drew yourself back, and Snape, it seemed, almost panicked as you did so.
Her eyes widened, and from her stupor she sprang, more alert, if not articulate, as she began speaking.
"Wuh-Wait, please, don't go-" She slurred, legs, and her soaked tunnel, tightening desperately as you did so.
You shushed her.
"Don't worry, Sylvie, this is just to get some leverage." You smiled.
"L-leverage?"
Using the space, you put your body into one strong thrust forward, punching back into Snape at top speed. Instead of the smooth penetration from earlier, this time, you practically carved into her body, her body welcoming you back in with what felt like elation, her inner walls spasming around your cock.
Snapes' face, on the other hand, froze, her mouth dropping open, invitingly hanging there.
You leaned in and captured her lips in your own, even as you began thrusting in earnest. Her tongue played against yours, seemingly desperate for you to dominate her mouth.
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At some point, Sylvie's legs had come up over your shoulders, and you used your grip on them to better thrust into her, as you did so, you alternating between staring down at her, catching you breath as put more focus into pounding her, enjoying the way she moan, and kissing her, dominating the potion professors mouth as she moan happily into your mouth.
You weren't entirely sure how long the two of you had been having sex for, but what you did know was that the potions lab was going to absolutely reek of you and Sylvie's activities.
You blushed slightly at the thought of your peers knowing what, exactly, you had been doing with the professor the night before. Or even just suspecting it.
That was something else that had slowly returned to you as the "detention" continued. Your ability to think ahead had slowly, steadily, returned to you, and you were forced to come to terms with the fact that you were fucking your teacher on the first night of the school year, while in the act of doing so.
You didn't stop, of course. That would have been monumentally stupid, for a number of reasons.
The most prevalent of which was that this, the sex, felt incredibly good, and Professor Snape looked incredibly happy.
Whenever you weren't kissing her, she just had that smile on her face. The one that spoke of nothing but bliss and relief, as if a great worry had been lifted off her shoulders.
So of course, you kept thrusting, enjoying the way her pale ass flattened against your thighs, and how her, unfortunately, still clothed breasts bounced cheerfully with each movement.
Occasionally, she would moan and mutter Thank you.
Eventually, though, you felt your own release coming up, and between plaps, you panted out part of a question.
"Would you like me to pull out?" Your question was cut off when, at the mention of pulling out, Snape's gaze sharpened, and her legs tightened around your back, practically forcing you in.
"Inside."
You blinked.
"P-pardon, Professor-"
Snape thrust back, causing you to reach new depths inside her, and punch more fiercely against her lowered womb.
"It's Sylvie, Herman," she blushed, before a cute, determined look came once more, "and I want it inside."
The unspoken please was clear in her eyes.
You grunted before tightening your grip and pounding faster.
"Alright then, I'm getting close-" You mumbled.
Snape smiled again.
"Kiss me."
You obliged, leaning in and kissing your professor once more, even as you felt the end coming.
A few thrusts later, you drew back particularly far, even as you explored her mouth with your tongue, and slammed inside, just barely breaching her womb, and letting your seed flow directly into the fertile grounds.
Snape let out a scream into your mouth, even as her eyes rolled and she shuddered, before going limp as the rest of your seed entered her. You let her ride out her orgasm before finally pulling back, a line of saliva connecting your mouths.
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Sylvie blinked slowly before letting her head drop back, and a giggle left her.
Her legs didn't release you quite yet, though.
"Mmmh, Herman?"
You blinked.
"Yes?"
"Thank you, I'll see you in class tomorrow." She said, looking you in the eyes briefly, before looking away.
Finally, her legs dropped, and she released you. You didn't leave immediately, thought, noticing the mess that was left.
"Professor, would you like a hand, err, cleaning up?"
Snape hummed, slowly pulling herself into a sitting position, even as seed leaked from her well-fucked quim. The table and floor were practically drenched in juices.
She gave you a sweet look, one that would seem utterly foreign and bizarre to anyone who didn't know what had transpired here.
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"Thank you, but if I keep you any longer, I'll be riding you until midnight, and we both have others expecting us." She said, as you realized that despite having just finished an extended bout of sex, she was still raring to go.
Having offered, you nodded and finally pulled up your own pants (hiding your own regrowing hard-on) and headed to the door.
You chanced a look back, only to find the mess and Sylvie herself gone.
After looking a moment longer, you shrugged and walked back to your dorm, relaxing in the afterglow of your own release.
Walking back to your dorm proved to be a relatively quiet, if somewhat uncomfortable affair. The last view of Snape had reawakened your body, despite the marathon you had just run, and thus, not only were you dealing with a sticky feeling in your pants, but an increasingly tight one as well.
Thus, as you walked, the few students you did pass gave you slightly strange looks at your odd gait, but you smiled and did your best to assuage any suspicions about your activities with a smile and a cheerful wave.
This didn't seem to work very well, though, and more than one student stopped to confirm that you had indeed been in detention with Professor Snape (you had to stop yourself from calling her Sylvie, you had made that mistake when a second year had asked, and the poor boy had nearly fainted on the spot).
You, of course, had assured them that you were, with a smile on your face, but that only seemed to make them more suspicious.
Despite these brief pauses, you felt that you had managed to make it all the way back to the dorms without any of the students realizing what had actually happened between you and Snape.
You didn't even quite believe it yourself. The thought made you blush, and you couldn't help but wonder what, exactly, you had been thinking when you agreed.
That thought of what your mother would say filled your mind, and you paled.
She couldn't hear about this.
Your mother had been hounding you for grandchildren since the moment you had turned eighteen, if she knew that you had already had sex.
The thought of the squeal she would make made you shudder.
Approaching the eagle knocker, you wait, as patiently as you could, for it to ask its Riddle.
A moment, then the metal avian shuddered and came alive.
"I have a mouth, and babble incessantly-"
"A river." You answered quickly.
The knocker gave off a depressed sigh before becoming inanimate once again, and the door opened.
Stepping through, there weren't many students out in the common room, as late as it was, and those that were there were, for the most part, reading.
Almost none noticed you as you entered; however, one in particular very much did.
Harry, who had been sitting in a large armchair near the entrance, shot up when the door opened, and practically dashed over to you as you walked in.
"Herman! Are you alright? She didn't do anything weird to you, did she?"
You couldn't help but smile at your friend. It was sweet that she was worried about you. As for her questions though…
Did it count as her doing weird things to you if you were the one who did most of the doing?
You considered the question, then understood that you need some clarification.
"Eh, define weird?" You asked uncertainly.
Harry's eyes narrowed, and, instead of answering your question or waiting for an answer to her own, she began looking you over. Up and down, walking around you in a circle, poking at you a few times, before finally circling back around, and, in an odd motion, seeming to sniff the air.
She paused.
"What's that smell?" She asked, leaning forward to sniff at your shirt.
"What do you mean?" You asked, trying not to begin fidgeting.
Harry leaned further, moving down your shirt, nose still twitching all the same as she moved.
"Something smells… weird," Harry said, dropping into a crouch. This movement put her at face height with your growing bulge.
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You hoped she didn't notice.
She looked up at you.
"What exactly did Snape have you do?" She asked, although, oddly enough, her face seems top have flushed, and she didn't leave her spot in front of you..
You laughed, reaching up and rubbing the back of your head.
"Uh, testing potions?" You offered, which was true.
Harry stared a little longer before she seemed to drop it. Standing and breathing just a bit heavier than before, she nodded.
"Are you ready to go back to our rooms?" She asked.
You nodded, relieved that the interrogation was over.
"What did Dumbledore want to talk to you about?" You asked as the two of you walked towards the stairs.
This time, it was Harry who stiffened.
"Well-" She began, looking away, "He just wanted to confirm a few things, and see how I thought classes were." She said evasively.
You nodded, although you were still unsure.
"Alright, what did you say?"
She would continue to give half-answers until the two of you went to sleep.
END OF DAY 1 (At least it was faster than the Hogwarts Express)