Twilight had a fairly good notion of where Rarity would be going, but even though she knew logically that she was just a clone, she still felt like the same old Twilight she always had. And that meant that she was going to be methodical about it. No assumptions, no mistakes.

Still, though, she wasn't surprised at all when her tracking spell indicated that Rarity was rushing toward her boutique. Even as lust-crazed as the potion had made her, Rarity was still Rarity, and her first priority was finding the right outfit for the occasion. Twilight had to stop herself from imagining what sort of outfit that might be – she had to avoid distractions if she was going to catch up to Rarity in time to make any useful observations.

Unfortunately, she didn't catch up to Rarity in time to watch her change into the new outfit or even soon enough to see what that new outfit might be. By the time she got to Carousel Boutique, Twilight found Rarity already on her way out, dressed in an unseasonably heavy overcoat that gave no hint about what might be hidden underneath.

Well, that was a little bit disappointing. Twilight had really been hoping to see just how much control Rarity had over her actions when not in the presence of an available male. And, yes, she could admit it to herself, at least: she'd been hoping for a chance to watch one of Ponyville's most renowned beauties dressing up in what had to be some incredibly provocative lingerie. Oh well. As long as she kept up with Rarity, she'd be seeing that lingerie soon enough, wouldn't she? Now just where was Rarity going?

It didn't seem like anywhere she'd seen Rarity going before. As far as she knew, none of the girls spent much time in this part of Ponyville, on the south side of the creek. But Rarity seemed to know just where she was going, heading there with a relentlessly purposeful stride.

She led Twilight to a row of industrial warehouses ... or at least as industrial as Ponyville ever got. The first two big buildings were obviously full of hay stored up for the winter. The third, though, was closed up tightly and all the windows were dark. And yet, ponies were coming and going. There were two mares leaving, and there – another stallion on his way in.

Rarity went in even more eagerly than that stallion had. Twilight rushed to keep up, lest she lose track of Rarity somewhere inside the big building.

What awaited inside completely blew Twilight's expectation of what Ponyville could be. Loud music boomed, deadened from the outside by some kind of muffling spell. Colored lights streaked across the dimly lit interior ... a huge empty room. Well, not empty, exactly. It was full of writhing, dancing bodies – stallion and mare alike, none of them wearing more than a bra and panties and most of them wearing much less than that.

A lime green mare came up next to her, nude except for a tight black mask completely covering her face. “Can I take care of that for you, ma'am?”

At first, Twilight didn't understand what the mare was offering. But then she saw Rarity's overcoat hanging on a rack just beyond. Ah, a coat check.

But the weather was warm. She hadn't worn a coat. She'd only worn her usual button-up blouse and ruffled skirt. What did the mare want from her, then? Unless...

Oh. Oh. There were quite a lot of clothes on those racks, and quite a lot of nude and nearly-nude ponies inside. Well, as long as it was for science, Twilight could handle anything she needed to.

Without any further hesitation, she unbuttoned her blouse, working her way down quickly and businesslike. When that came off, it revealed her plain white bra. Then she unzipped the little hidden zipper on the side of her skirt and slipped that down her legs, revealing her plain white panties.

The mare seemed content to take her blouse and skirt. She even smoothed them out nicely before hanging them so that they wouldn’t wrinkle.

From there, Twilight was free to explore the building, apparently. Some kind of dance or sex club? The ponies on stage were sure pushing it into sex club territory. How had Twilight never known? Of course she'd known Canterlot had sex clubs – some of the most renowned ones in Equestria. But she'd never even suspected that little old Ponyville might have one ... especially not one as popular and thriving as this one seemed to be. But, of course, it didn't surprise her that if such a thing existed in Ponyville that Rarity would know about it. She'd probably be constantly making custom outfits for ponies to wear here.

For Rarity to go to such a club, though? Was it something she did regularly, or was that a decision that had been influenced by the potion? Rarity had sure seemed to have just the right overcoat and outfit ready to go, which argued for it being a regular indulgence of hers ... but then again, Rarity always had the perfect outfit for anything, and it wouldn't have taken her long to prepare to go here.

Where had she gone, anyway? Twilight had lost her while disrobing. Nothing another application of that little tracking spell couldn't fix.

There! Somewhere near the back of the building!

Grinning, Twilight honed in on her foxy quarry. She'd have Rarity's secret in no time! Oh, yeah ... and she'd get lots of good notes on the potion's effects, too. Of course. That was the real reason she was coming here, wasn't it?

As Twilight made progress, though, her grin began to fade a little. She became aware of the odd looks she was getting. Yes, all the ponies in here – some she recognized and who no doubt recognized her – were in their underwear or even less, just like Twilight ... but their outfits weren't just like Twilight's. They had frilly lingerie with lace centers that left nothing to the imagination, or tight jockstrap-like briefs that scarcely managed to cover a stallion's sheath and balls with a tiny strip of sequined fabric, or tiny micro-bikinis that weren't quite big enough to cover the cleft of a pussy here or an aureole there. Compared to them, even Twilight's panties and bra looked stodgy and overly modest. Should she take them off? Maybe just the bra, and then go topless? But then she'd have to carry her bra around with her, and wouldn’t that look more awkward than what she was already doing? In the end, she decided to just let ponies stare. Who cared? It wasn't like ponies would go around calling her out on it later – they'd never be able to talk about it without admitting that they were here themselves, and clubs like this tended to thrive on secrecy, even if everypony already knew about them.

The tracking spell led her down an even darker hallway at the back, then down a left turn, where a big red sign simply read, 'STALLS'. What was she getting into now? Despite the world-class sex clubs abundantly available in Canterlot, Twilight had never frequented them when growing up. It wasn't the kind of thing a reclusive bookworm tended to get into. So she wasn't entirely sure what to expect at the end of this hallway.

She wasn't alone back here, though. Both mares and stallions came and went ... more stallions than mares. Did that mean something? Mares had outnumbered stallions back on the dance floor, but here it was the other way around.

Soon, she came to the end of the hallway – it wasn't a very long one. It ended in a large room with a bunch of stalls in it. Well, that made sense. They kind of looked like bathroom stalls in a way ... except that stallions and mares were freely going out of them all at once. She was just in time to spot Rarity's tail disappearing into one stall and the door shutting behind her.

Luckily, the stalls all seemed to be open at the top, and there was quite a bit of room between the top of them and the warehouse's high ceiling. All Twilight had to do was cast a little notice-me-not spell on herself, and then she could use her wings to fly right up.

Carefully, she perched herself up on top of the walls of Rarity's stall. It wasn't easy, and the walls rattled a little bit when she landed on them, which made Rarity look upward. Thankfully, though, the notice-me-not spell caused Rarity's eyes to slide right past Twilight, never actually taking notice of her ... and soon enough, Rarity looked back down, shrugging off the weird noise the stall's walls had made.

Twilight finally got a good view of what Rarity had chosen to wear, and it was fascinating. Definitely worth taking a few notes on. She wore a set of bra and panties made of midnight purple lace that stood out perfectly against the white of her body, adorned with little bits of dark amethyst in just the right places to glitter suggestively. But the most striking part was what it didn't cover. Each cup of the bra had a tall diamond-shaped cut in it, perfectly positioned to expose Rarity's pink nipples, and there was a matching cut in the panties, making them crotchless and leaving Rarity's pert pussy on full display. Interestingly, Rarity had a small diamond stud piercing her clit. That certainly hadn't been added since she'd taken the potion – that was a clue about the everyday normal Rarity.

Now that was the kind of outfit to go to a sex club in! Rarity always did know just what to wear. What was she doing in these stalls, though? There was nothing inside them. Some kind of changing room? But who would insist on modesty while changing clothes in a place like this?

It wasn't until a nude stallion came into the adjacent stall and shoved his half-erect cock through the wall that Twilight noticed the holes in each wall. Oh... Now it made sense. She'd read about gloryholes, of course, though she'd never seen one. And to be fair, it wasn't easy to see the holes themselves when looking from the top down. So she could excuse her observational lapse.

She made sure to take perfect notes, though, as Rarity got on her knees in front of the freshly presented cock – a midsized orange one, still wet with fluids of unknown origin. Twilight could see the earth pony stallion on the other side of the wall, but Rarity wouldn't have been able to. That didn't slow her down in the slightest, though.

Twilight made special note of it: no noticeable delay in acceptance. The moment Rarity spotted the cock flopped into her part of the stall, she dropped to her knees in front of it and took the tip of it into her mouth. She hadn't used her hands to explore it first or even to help guide it in – she'd just gulped it down like it was nothing.

The stallion – Twilight didn't recognize him – groaned slightly, pressing himself tighter against the wall.

That seemed to be the only invitation Rarity needed to swallow him all the way to the hilt ... or at least as close as she could get, given the slight amount of distance the wall forced between them. She made a feminine little sigh as the half-hard length flowed into her throat. And the hole must have been big enough for the stallion's balls to protrude through a little, because she lifted both her hands up as well. Even though Twilight couldn't see quite what Rarity was doing from her high perch, that pose was unmistakable.

Rarity slammed herself forward and back against his rapidly hardening cock, moving as if she was already trying to drive him to his climax, rather than just getting stated like she actually was. With each push forward, her lips kissed up against the wall.

The Rarity Twilight was familiar with would never have considered touching her delicately painted lips to something so disgusting – this surface that must be coated in the remnants of so many dubious bodily fluids – but under the effect of the Potion, it seemed that it wasn't something that would even enter into Rarity's mind at all.

Twilight was in the perfect position to watch the stallion's eyes roll up into his head as Rarity serviced him relentlessly. He seemed to melt up against the wall, flattening himself there to get as close as he possibly could.

But as vigorous as Rarity had been in the beginning, she was starting to show a bit more of her more refined side as time went on. Maybe she was starting to overcome some of the potion's strongest effects? Anyway, the evidence for this – which Twilight recorded with her usual meticulous zeal – was that rather than simply pounding herself against the wall to swallow the stallion's cock as much and as often as possible, Rarity was interspersing her headlong plunges for a few more subtle takes on the art of fellatio: she took time to duck underneath his length to lick and suckle his balls, she slid her mouth lovingly up and down each side of his shaft, and she even tried stroking his length delicately with her perfectly manicured fingertips while resting his tip on her tongue.

She wasn't entirely free from the potion's effects, though – or was it just part of her usual technique? – because between each of these finer points, she seemingly couldn't resist sliding his cock all the way down her throat again, plunging herself down on it almost mindlessly.

Twilight studiously ignored the dampness in her own panties. No, this was about the potion and its effects. Not about her. This was for science! The only distraction she allowed herself was a brief pause to make note of this club's address. For future reference. Just in case she ever found herself incredibly worked up and in desperate need of release ... now she'd know exactly where to go. Still, though, the sight of Rarity's lithe back and the way her barely-there panties hugged her pale ass cheeks so perfectly ... that was a major force of distraction, one that Twilight had to exert quite a bit of self control to ignore. Goddess, she'd probably end up using this place herself very soon if she kept getting this worked up.

And speaking of ponies in desperate need of release, the way the stallion's breaths came in short, needy gasps told that he'd soon be finding his own, not to mention the evidence Twilight could see in Rarity's throat. The bulge of his flare was clearly visible as it traveled up and down through Rarity's neck, even from above. How did she manage to take it so smoothly?

Rarity had simply planted her mouth against the hole at this point, allowing the stallion to fuck her face at will. And he was taking full advantage of it, rearing back and then slamming forward, sliding almost his whole length in and out of Rarity's throat each time. The only complaint Rarity made was a slight gluck sound each time he bottomed out. Twilight could see the sheen of Rarity's spit glistening in the dim light along the base of his cock each time he pulled back. It looked so stiff now, each and every vein standing out prominently. He must have been so close...

And indeed he was. With one final groan and a thrust that shoved his length as deep as it could possibly go in Rarity's throat, he paused right up against the wall, his legs trembling and his tail pulsing slightly behind him.

For a long few moments, that was the only clue Twilight had to go on that the stallion had orgasmed. Not a single drop even came close to escaping from Rarity's mouth. That is, at least, until the stallion finally began to soften and pull out of her.

Only when his still-flared tip popped free from between Rarity's lips did a few fat drops of cum spill free, dribbling down onto her mostly-exposed breasts. Swollen out as wide as it was, his tip filled nearly the entire hole in the wall. It left another few drops behind on the wall itself as he pulled it back through.

“Wow,” he said, still panting a little. “You are amazing. Any chance we could, you know, meet up again sometime?”

Rarity planted her mouth against the hole, sticky mess notwithstanding. “Just tell your friends, darling. I could use some more.”

“Best club ever,” the stallion mumbled as he turned and left his stall.

Luckily, he took Rarity's request seriously, so that neither Rarity nor Twilight would have to wait long until the next phase of the experiment.

Just as Rarity took a kneeling position in the middle of her narrow stall in order to take a brief rest, Twilight heard the stallion calling out to a couple more: “Hey, check out the slut in stall sixteen! Sucked me dry in like ten seconds flat, and she's still begging for more!”

Rarity smiled a little. She looked pleased to hear the compliment ... of sorts. Twilight made note of this. Another of the potion's psychological effects? It shouldn't have been able to produce anything that subtle or deep-seated. So was that part of Rarity's natural personality? No way to know for sure until she came back together and compared notes with the other Twilights.

The thin walls shook a little underneath Twilight. Two new stallions had entered the stalls adjacent to Rarity's. Twilight held her notepad at the ready. Things were about to get interesting.

This time, the stallions were both ones she recognized from around Ponyville: Big Shot and Eff Stop – the former brown and blonde, the latter white and light blue, like a faded version of Shining Armor's colors. She was used to seeing them around sporting complicated cameras and snapping up pictures of anything they could sell tabloids about ... but this time Eff Stop was sporting only a pair of red, satiny boxer-briefs, and Big Shot wasn't wearing anything at all.

Being nude proved to be a significant advantage for him, because unlike Eff Stop, he was able to just shove his already-swinging cock right in through the hole in the wall. And while the other stallion was still fumbling to get undressed, Rarity's eager mouth met the tip of Big Shot's cock.

Just like with the previous stallion, Rarity showed no hesitation in swallowing this one down, despite his larger size. She hummed contentedly to herself as her mouth was filled with soft – and doubtless nicely warm – horse cock. Of course, that forced her to look directly away from where Eff Stop's pale cock soon protruded out from the opposite wall.

Twilight would have thought that Rarity hadn't noticed her second visitor. But Eff Stop's cock hung out just far enough to nudge against Rarity's ass cheek a little bit, and the way her tail shot up when she felt that was a surefire sign that she was quite aware of the second needy cock right behind her.

That didn't slow Rarity down with the one in her mouth, though. She lovingly and lasciviously applied herself to pleasuring every last bit of that big brown cock. And as she pulled back to lick and kiss the sides of his shaft, Twilight was finally able to see just how big it was. Almost fully hard as Rarity slathered her mouth over its surface, it stretched out much larger than the previous stallion. Quite impressive, actually.

Rarity sure seemed to like it, at least. She cooed happily as she kissed the base of it, her cheek right up against the wall and her hand fondling the distant tip.

Once it was completely erect, though, she turned away. At first, Twilight thought that it might be something going wrong with the potion's effects – some bizarre aversion if the cock was too large. But no. Rarity was actually lining up her rump and raised tail to the hard cock that was now behind her.

And as for the cock in front of her ... she began to lick and suckle that one every bit as eagerly as she'd done for Big Shot, even though it had already mostly shriveled back into Eff Stop's sheath while she'd neglected him earlier. Rarity was easily able to fit the remaining length completely in her mouth, and it quickly responded, swelling and beginning to slide down toward her throat as Eff Stop moaned from the other side of that wall.

Even as that was happening, Rarity had one hand down between her legs, helping to align the tip of big shot's cock with her pussy lips. Since there was no need to pull her crotchless panties aside, she was still able to spare a hand to delicately caress Eff Stop's balls.

There was – probably by design – just enough space between the walls for Rarity's bent-over body. Pressing herself back against Big Shot's cock took her farther away from Eff Stop's. Rarity gave a girlish little squeal as Big Shot's tip spread her pussy lips open and slid inside her – a squeal that Eff Stop probably felt as much as he heard, since her lips were wrapped around his cock as she made the sound.

But as Rarity slid herself farther back on Big Shot's spit-slick cock, that took her mouth away from Eff Stop, leaving him with only Rarity's free hand. Twilight made careful note of the way Rarity kept stroking him as she wiggled her hips side to side a little, nudging herself pertly back against Big Shot, getting his cock nestled perfectly inside her.

Eff Stop didn't have to go without for long, though. First, Rarity brought her other hand back into play, teasing his balls as she traced her fingers over his length. That soon coaxed him back to enough stiffness that his cock rose up toward Rarity, which finally let her lick his tip again. What really got it back into action, though, was when Rarity began slowly sliding herself back and forth between the two walls.

It was slow and sensual, a major departure from the urgent need she'd been displaying earlier. Her tail twitched a little bit every time Big Shot's medial ring plipped its way back or forth over her pussy lips. And while holding Eff Stop's cock steady with both hands on the base of it, she simply opened her mouth and let every forward push slide her lips over his pale shaft.

That soon brought Eff Stop up to full mast, and from what Twilight could see – Rarity never did let his tip entirely out of her mouth – he was nearly the size of Big Shot, leaving Rarity spitroasted between the two sizable horsecocks, her tits swaying beneath her as she slowly rocked back and forth, always filled from one end and about to be filled from the other. With every motion, she made a contented little cooing sound that just made the stallions press themselves against the walls all the more tightly.

It was at that point that Twilight began taking notes specifically on Rarity's technique, for the purpose of later experimentation of her own ... experimentation completely different than the kind of potion experiment she was running right now.

Because Rarity's technique was enviable. How did she make it look so smooth, so effortless? Every time she pressed herself back against Big Shot, her back arched as if it was the most natural thing in the world, helping her press that much more closely against the wall. Every time she pressed herself forward against Eff Stop, she slid her hands all the way down to his balls, making way for her lips to press slightly into the hole, between the material of the wall and his veiny girth. And there was no jerkiness or awkwardness to her movements – she moved between the two stallions like water gently sloshing back and forth in a bowl, flowing over their motionless cocks and leaving glossy wetness behind when she retreated.

It was quite a sight, even from Twilight's limited vantage point. The hourglass swell of Rarity's body, punctuated by her picture-perfect lingerie and rocking back and forth between the two healthy-sized horsecocks... She resisted the urge to touch herself as she watched. That would get in the way of taking notes. She'd have to remain focused if she wanted to fulfill her duty to the other Twilights and help collect a complete set of data for all the different research subjects. Still, though, she found herself breathing faster and harder just like the two stallions.

Well, perhaps not quite as much as them. She was definitely breathing as hard as Eff Stop, but the longer things went on, the more Big Shot was outpacing her. He'd begun to match Rarity's rhythm, pulling back as she did, then slamming his hips against the wall as she came back toward him ... but that matched rhythm only lasted so long. Soon, he was thrusting himself like mad against the thin wall, sometimes managing to get two thrusts in while Rarity was close, other times just popping his tip in and out of her pussy when she swallowed down Eff Stop's cock again.

And in those brief moments when Big Shot's tip popped out from between Rarity's pussy lips, Twilight could see that he was beginning to flare. She held her notepad ready, prepared to make careful note of what Rarity chose to do with the next load of cum she was given.

It was clear that Rarity was aware of him flaring up, at least at some level. She squeaked a little – a tiny, high-pitched sound squeezed out around Eff Stop's cock – every time Big Shot's flare spread her entrance open. Other than that, though, she didn't seem to react to it. She didn't change her rhythm at all, still focusing on pleasing both stallions equally.

Finally, though, Big Shot couldn't hold it back anymore. “F-fuck!” he groaned. “Gonna cum!”

That changed Rarity's behavior. She pushed back onto his cock, once again nestling it deep inside of her, all the way until her ass cheeks pressed tightly against the wall, and this time she held herself there. Eff Stop would have to make do with just her stroking hands while she bathed Big Shot in her innermost warmth and waited to be filled.

She didn't have to wait long. There was a loud thunk as Big Shot's legs gave out, his knees hitting the wall in front of him. He desperately grabbed at the top of the stall, right between Twilight's legs, which was just barely enough to keep him upright and keep him from slipping out of Rarity.

Once again, there wasn't much for Twilight to see, at least not from above. She wished there was room enough to get down there in the stall with Rarity, to get a closer look, perhaps to be able to count the pulses of Big Shot's cock as he pumped his cum inside her. But no, there was only so much a notice-me-not spell could do, and split as she was into five copies, she didn't have enough magical power to attempt anything more advanced. A shrinking spell would have been superb – then she could have become as tiny as a fly and gotten right there in the action ... though she might risk getting enveloped in a glob of cum if she happened to be in the wrong place at the wrong time.

“Mmm,” Rarity cooed, still stroking Eff Stop's cock. “That hits the spot. Do keep it coming, won't you?”

But he wouldn't. Big Shot was spent. As his orgasm faded, he finally gave in to gravity's tug, falling away from the hole in the wall and landing on his ass with a thud. His cock flopped down between his knees, still flared at the tip and trailing a long strand of cum that gradually dripped down to the floor.

Rarity, showing an unusual lack of concern for her clothing, spared a hand from Eff Stop's cock to rub her creampied pussy, smearing Big Shot's cum all over her pussy lips, the fringes of her panties, and her perfectly manicured fingers. It certainly seemed that Big Shot had lived up to his name, delivering an impressive volume of cum inside her.

She wasn't satisfied with that, though. After giving Eff Stop's tip one more lick – almost like a goodbye kiss – she turned around again.

This time, she didn't need to use her hand to line things up. Everything just worked out nicely. Eff Stop's tip slid cleanly into Rarity's very unclean pussy. A wet squelch of the other stallion's cum seeped out of her as Eff Stop's cock squeezed inside.

Eff Stop didn't seem to mind, though. “Oh wow,” he said from the other side of the wall, “you're so warm!”

In response, Rarity gave a coquettish giggle and pressed herself the rest of the way down his shaft, until her messy pussy lips splatted up against the hole in the wall. Rather than move back and forth this time, she let the stallion take the lead.

At first, Eff Stop just stayed right where he was, either simply enjoying the sensation of being all the way inside Rarity's hot, squishy pussy or not understanding what she was doing and waiting for her to make the next move. Soon, though, he must have realized what was going on, because he pulled back just enough to push into her again through the hole. When he heard Rarity's encouraging little gasp as he did so, he truly began going at it, thrusting again and again into her.

Rarity still gasped slightly with each and every one of his thrusts, as if his cock was actually driving the breath out of her with each push. Slowly, luxuriantly, she slid her hands down along the floor, bending down until her breasts touched beneath her, until her face was almost – but not quite – against the easy-to-clean tile floor.

Interesting. Twilight made a note of it. So Rarity retained at least that much of her pre-potion mindfulness. She would never have condoned putting her carefully made-up face against those dubiously clean floor tiles ... and whether she would have done the rest of this without the potion or not, she still had enough dignity left to avoid that.

From his side of the wall, though, there would be no way for Eff Stop to think that Rarity was holding on to any scrap of dignity at all, though. The little mewling sounds she made as he pounded into her would have made any mindless bimbo proud, and the intensely wet plap-plap-plaps of skin against wall spoke to both Rarity's urgent need and the mess she'd already made of herself.

Not that Rarity's voice remained constant. Rather, it was a steadily rising crescendo. The faster Eff Stop pounded into her, the louder and more encouragingly she moaned. The more she moaned, the faster he went. It just grew and grew until the whole stall was shaking back and forth with every hit of his hips against the hole. Twilight had a hard time maintaining her perch. She actually had to steady herself with her wings.

“Yes!” Rarity cried with each hit. “Yes-yes-yes-yes-YES!” A new splatter of wetness trailed down the wall behind her, and now she finally lost all control, letting her face hit the floor as her body convulsed around the cock still moving inside her. From the tensing of Rarity's back muscles and the way her tail pulsed up and down, Twilight knew it must have been a particularly incredible orgasm. She made a note: 'Ask all participants about intensity of potion-accelerated orgasm as compared to standard orgasm'.

Whether by the feeling of Rarity's hot mess of a pussy squeezing down on him in orgasm or just because he'd already been through a lot of teasing before starting with her, Eff Stop didn't last much longer than Rarity. Just as Rarity began to recover from her own orgasm and pick her face up off the floor, he pushed himself tightly against the wall and let out a desperate little groan.

“Ooh,” Rarity said in return, her voice dreamy and a little distant. “Oh yes, that's quite nice...”

The two of them stayed like that for a long moment, motionless ... at least externally. Inside, Twilight knew, Eff Stop's cock would be throbbing, gushing out a fresh wave of cum into Rarity's already-full womb. Thankfully, the potion would block any fertilization. It had to, or this experiment might be slightly unethical.

Finally, Eff Stop pulled out of her and staggered back against the far wall of his stall. A thick trail of cum seeped out from between Rarity's pussy lips, flowing down and soaking into the white fur of her thighs.

She didn't seem to even notice, though. Her head was tilting in odd little circles, her eyes drifting closed. Slowly, she sank down to the floor, her ass still against the wall, smearing its way down. And there, right there on the floor, with her pussy leaking cum out onto her fancy lingerie, Rarity drifted off to sleep with a contented smile on her face. Not even the sound of the adjacent stall door opening and closing as Eff Stop left was enough to rouse her.

Twilight flicked on a quick pocket watch spell, then made note of the time. Post-coital drowsiness was one of the predicted side effects of the potion, and it would be important to make note of how long it took before that effect could be expected to become overwhelming.

Author's Note

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