It's Not THAT Kind of Party.

by manta999

Rating: mature
Tags: Sex, DJ P0N-3, My Little Pony: Friendship is Magic, Romance, Porn, Rarity, Profanity
Length: 5035

When Pinkie invited Rarity to a "fancy" party, she imagined something very different from what pinkie had in mind. Now it's up to Vinyl Scratch to help Rarity cut loose...and broaden her horizons.

When Pinkie invited Rarity to a "fancy" party, she imagined hors d'oeuvres, a string quartet, and elegant suits and nightgowns. Unfortunately, Pinkie's idea of "fancy" was wildly misleading. Unprepared and overdressed, It looked like Rarity was in for a terrible night, until Vinyl Scratch took it upon herself to help Rarity cut loose...and broaden her horizons.

Written for KukriRyuTsukino For the Summer Sin Celebration.

Published 2022-06-29 04:30:00 UTC
Last updated 2022-06-29 04:30:00 UTC

It's Not a Party, It's a Par-TAY

Author's Note

This is my first serious vanilla F/F story. I was glad to get a prompt for two characters that don't get paired too often that nonetheless seemed to really fit nicely. Enjoy!

It's Not a Party, It's a Par-TAY

"Pinkie Pie, what in Equestria are you wearing?"

Rarity had been happily surprised when Pinkie had asked if she wanted to attend a fancy party in Manehattan. She was always game for a good soiree. It would allow her to mingle with the kinds of ponies that could truly appreciate the most cutting-edge fashions.

When Pinkie had told her to "dress up" she had taken the opportunity to devise a marvelous dress. It was both elegant and modern, its colors running through a range of purples and blues that beautifully complemented her mane. Along with her accessories, this was an outfit to outshine even the designs she had worn to the Grand Galloping Galas.

That was why she was surprised to see Pinkie show up wearing fluffy legwarmers, heart-shaped sunglasses, and a necklace with glowsticks hanging from it.

"Well, duh! I'm wearing this for the party!" Pinkie answered. "I told you to dress up, didn't I?"

Rarity sniffed at that remark. "I did dress up. Darling, I know we have different tastes, but even you have to see how silly that outfit of yours is. I mean, neon green fuzzy legwarmers? Nopony in their right mind would wear that to a fancy party!"

Somehow, Pinkie seemed surprised at her assessment. "But this is what I always wear to these parties, and nopony's said anything about it before."

Rarity shook her head. They're probably too shocked to point it out, she thought. Once they got to the party, she'd have to break it to Pinkie gently. After all, it would be easier once they got there and saw that nopony else was dressed as absurdly as her friend.

Hopefully, Pinkie wouldn't feel too foolish.

As it turned out, Pinkie didn't feel foolish at all. Rarity, on the other hand...

Nopony else had dressed in stunning suits or elegant gowns. The dress code wasn't black tie, formal, or even semi-formal. It wasn't that kind of party at all. There were no hors d'oeuvres, no champagne glasses, no fashionable ponies making witty conversation.

Pinkie had brought Rarity to a rave.

As such, Rarity's elegant eveningwear was out of place amongst a sea of ponies dressed in skimpy outfits in a kaleidoscope of clashing neon colors. "I stick out like a sore hoof!" she snapped at Pinkie Pie as she looked over the dance floor, seeing the other ponies' outfits whenever the strobe lights flashed.

Pinkie's reply was nearly drowned out by the thumping EDM music. "Of course it's a fancy party! Look," she gestured to the crowded bar where amped-up club ponies were downing shots between dances, "they're using coasters at the bar. That's super fancy-schmancy!"

Clearly, she should not have trusted Pinkie to have an adequate standard of what made a party fancy. As a new song came on Pinkie's ears perked up. She yelled, "Ooh, I love this song! Come on, Rarity, let's hit the dance floor and dance our tushies off!"

Rarity wasn't so enthused. For one, she had been expecting something entirely different, but on top of that, she really wasn't dressed for it. The dance floor was packed with sweating, dancing ponies, some of which were holding drinks. If she went out there, she had no doubt that somepony would sweat, step, or spill on her dress. Instead, she politely excused herself to sit at the bar while Pinkie flung herself into the throng of dancing ponies.

It was so crowded that she had to squeeze just to get to the counter, and there were no stools to be found when she got there. The club was so packed that it was standing-room-only.

It felt like ages before she could get a barkeep's attention. "Excuse me? Excuse me, could I get a glass of red wine?" She didn't ask to see a wine menu; She would be happy with anything at that point.

She couldn't even get that, as it turned out. "Lady, we don't have wine here. I could get you some grape-flavored jello shots."

Rarity looked around her and determined it was not likely that she could slurp down a jello shot and look dignified, much less avoid staining her dress. "I'll settle for a vodka and soda if you can manage it." The bartender served her with a shrug and moved over to tend to other ponies, clearly too swamped with orders to show much concern.

Rarity managed to keep her place at the bar to finish her drink, despite the constant press of ponies trying to squeeze in to make a drink order. A few came dangerously close to stepping on her dress and were driven off by searing glares. She was in the miserable situation of being the only pony at a party that wasn't having a good time.

The only upside to being ignored was that nopony was commenting on how out of place her outfit was. That was until somepony squeezed next to her at the bar and yelled over the music, "A bit overdressed, aren't we?"

"Oh, really? I hadn't noticed!" she snapped back at the other pony. She was in no mood to be mocked.

When she turned to look at the other pony, she saw a unicorn mare with a blue mane and a coat the same color as her own. She rolled her eyes, "Geez, Rarity. Take a chill pill."

"Oh, is that what everypony here's been taking?" Around the bar, Rarity had seen more than a few ponies taking what she strongly suspected were club drugs. She squinted at the other mare. She seemed awfully familiar, and she had used her name. "You seem to have me at a disadvantage. Have we been introduced?"

"Not exactly," the blue-maned mare replied, "but maybe this will jog your memory." The mare's horn glowed and lowered a pair of shades that had been resting on her head. Once they covered her eyes, Rarity connected the dots.

"DJ Pon-3?" Rarity hadn't recognized her without her shades on, or from her voice. Come to think of it, she wasn't sure she had ever heard the disc jockey speak.

"You've got it! But that's only when I'm working," the DJ said. "When I'm off the clock, it's just Vinyl Scratch." She waved the bartender over and bought herself a drink. "For real, though. It's a nice dress, sure, but you look like you got lost on your way to a garden party in Canterlot."

Rarity sighed and tiredly explained the situation to Vinyl Scratch. When she was finished, her newfound drinking companion gave a dry chuckle. "That sounds like Pinkie Pie, all right. It wouldn't be the first time. Last year she asked me to DJ for 'the party of the century,' and when I showed up, it turned out to be a two-year-old's birthday party."

It was all too easy to picture that, Rarity thought. She could clearly imagine DJ Pon-3 showing up with all her equipment to a baby's birthday party, with Pinkie standing there all the while as if it were completely normal. It was pretty funny, she had to admit to herself.

"Ah, I think I see a smile!" Vinyl scratch said, reading Rarity's expression. "I don't think I've seen you make one of those since you walked over here." She seemed very happy with herself, downing the rest of her drink in one go. "I know what'll keep you in that good mood. Let's dance!"

Rarity hesitated. "That's a kind offer, but I'm not sure that's a good idea, darling."

"Don't be such a party pooper," Vinyl responded. "This DJ isn't as good as I am, sure, but they're still laying some pretty sweet beats down."

"I'm sure these are 'pretty sweet beats', but that's not the issue. As you mentioned, I'm not quite dressed for this kind of party."

"Oh! If you're worried about the crowd, don't be," Vinyl said. "It's way less crowded in the VIP section. Nopony's gonna step on your dress."

The VIP section? Rarity hadn't known that the party had a VIP section, but the mere mention piqued her interest. She supposed it was a little vain, but she liked the sound of being let into the section reserved for very important ponies like herself.

"In that case, lead the way."

The VIP section was on a second floor that overlooked the main dance floor. The two mares had to go up a flight of stairs to get to it. Seeing that Rarity wasn't tripping over her skirts as they climbed, Vinyl commented, "Wow, you can really move in that thing!"

"Of course," Rarity proudly responded, "My outfits are functional as well as fashionable."

"Then maybe you'll be able to keep up dancing with me!" Vinyl pulled Rarity over with her to where the other VIPs were jumping and swaying to the beat of the music.

Amongst the other ponies present were a few that Rarity recognized from the fashion and entertainment industry, but they were too engaged in their own partying for her to approach them. Just as well, she thought. If they see me dressed like this, they'll think I'm ridiculous, or at the very least, extremely eccentric.

Rarity watched Vinyl dance, swinging her head back and forth, her shades catching the colored lights of the club. Her mane swept around as she moved, and her cobalt hair seemed to sparkle around her. She was clearly well accustomed to this kind of party, and Rarity could only try to copy some of her moves.

Seeing that Rarity was trying to dance in a way that fit in, Vinyl shook her head. "No, babe, not like that. You can't just shake your head, you have to start the motion at your hips. Put your whole body into it, you know?"

Rarity tried to follow her advice, but Vinyl just clucked her tongue as her horn started glowing. "You're almost getting it. Here, let me help you." Vinyl used her magic to gently hold Rarity's waist, moving and tilting it to guide her dancing. "See, just do it like that!"

For a minute Rarity danced that way, with Vinyl's unseen grip holding her waist, swinging her entire body from the hips. Her dress swept back and forth behind her, almost like another tail.

Once she had the hang of things, Vinyl let go. "See, now you've got it!" She moved alongside Rarity, pressing her flank against her so that their cutie marks were touching. As the song went on, Vinyl and Rarity danced in sync, bumping and grinding their flanks together.

All the stress from before had melted away by then. Rarity was losing herself in the ecstasy of dancing, letting the bass-heavy music pound the worries out of her head. Sometimes the club's lights illuminated the room with a wash of colors, sometimes lasers lanced overhead, and sometimes strobe lights dazzled the partying ponies in an almost hypnotic manner. The two mares danced together for song after song, dancing until they were practically delirious.

A new song came on, one with a slower rhythm and deeper notes. Some of the sounds were from intelligible vocals that sounded more like moans or groans, and the club's lights shifted to a purple-pink color. She had lost track of Vinyl at some point, as the VIPs were crowding closer together, and Rarity wasn't sure how she was meant to dance to this song.

Searching for her friend, she squeezed past a few VIPs, careful not to ruin her dress. By the railing of the balcony, she came face to face with Vinyl. She greeted her, "Hey!"

"Hey," Vinyl answered, and proceeded to, with no warning, lean forward and kiss Rarity.

Rarity was so surprised that she didn't pull away, her open mouth only serving to allow Vinyl to slip her a bit of tongue, the DJ's tongue stud clinking against her front teeth. The deep, pounding music felt like it was hypnotizing her, making her not want to resist. It wasn't until Vinyl broke the kiss that Rarity exclaimed, "Darling, what in Equestria's gotten into you?"

Vinyl cocked an eyebrow, almost bemused that Rarity would have something to say about getting kissed without warning by a pony she had only just gotten to know. "Did I misread that? I thought you were into mares?"

"That -- That's not the issue!" Rarity stammered. She wouldn't say she wasn't into mares. She was, after all, a very cosmopolitan mare, and she wasn't about to make a scene about such a thing in public. "It's just that, well, that kind of 'PDA' seems a bit uncouth, doesn't it?"

Vinyl only chuckled at that. "Babe, maybe somepony needs to explain to you the kind of party this is? It's a rave. A lot of other ponies are getting up to far more 'uncouth' behavior if you catch my drift." She gestured over the railing at the main dance floor with her head, and Rarity saw the truth of her statement. Many other ponies were kissing, and much more unashamedly that Vinyl had.

That was the least of the unbridled debauchery on display, however. There were mares that hat their tails hiked up, showing their marehoods and tailholes to anypony who saw their derrieres. Similarly, many stallions' members had dropped from their sheaths or were standing fully erect, and all were proudly dancing, not caring who saw.

She even thought she spotted a stallion in the corner that might have been dancing closely with his marefriend, but Rarity suspected she was giving him a hoof-job.

"Oh my," Rarity gasped, averting her eyes. "I hadn't realized this party had turned into such a bacchanal!" She knew that ponies hooked up at these kinds of parties, of course, but this kind of public debauchery was more scandalous than she had expected. Though she had to admit, it was a bit exciting as well.

Vinyl grinned, following Rarity's gaze. "Wow!" she exclaimed as she saw the pair of ponies in the corner that were getting physical right on the dance floor. "Usually, nopony gets that frisky until much later in the night." If Vinyl was shocked, however, she didn't show it, as her eyes lingered on the unabashed lovers.

"So, ponies usually start doing things like that at some point at these parties?"

"Every single time," Vinyl answered. Seeing that Rarity had put some distance between them, she added, "Hey, I didn't freak you out just then, did I?"

Rarity blushed nervously. "It -- It's just that..." She stammered, trying to put her thoughts in order. "You surprised me. I thought you just wanted to dance with me. I didn't think you were trying to pick me up." She was horribly embarrassed. If she had done something to lead Vinyl on, she hadn't noticed, but then she wasn't experienced with that sort of thing.

"I was just trying to dance with you," Vinyl said, "but, I mean, you're really hot, and after dancing for long enough I kinda' just wanted to kiss you. I mean, it's a party, you know? It's the perfect place to try something exciting." She stuck her tongue out just enough that the stud of her piercing clinked on her front teeth before adding, "I guess I should have asked first. Was I that bad?"

"No," Rarity admitted, "Not exactly..."

Vinyl smiled. "Does that mean I can kiss you again?"

Rarity had never experimented with another mare before. Not that she was grossed out by the idea, but it had just never happened. She had never tried to make it happen. She certainly hadn't been expecting it to happen tonight, but now, with Vinyl offering...

"Why not?" she said. Like Vinyl said, this was a night to try something new, something exciting. And if she were to experiment with a mare, she could do worse than Vinyl Scratch. The DJ had a coat as white and immaculate as Rarity's, and an impeccable (if not somewhat "alternative") fashion sense. She was friendly, too, and gregarious in a way that reminded her of Rainbow Dash or Applejack.

Vinyl's mouth twisted into a smile before kissing her again. She matched the gentleness of Rarity's kiss, at first, closing her eyes as their lips slowly pushed against one another's. But after a minute, her tongue slipped back into Rarity's mouth.

The DJ's tongue grew bolder and bolder, wrestling against Rarity's own. Warm breath washed over her face as Vinyl exhaled, moaning into her mouth. Peeking an eye open, Rarity saw that Vinyl was blushing too, her tail starting to flick around of its own volition. Rarity had never gotten anypony this excited just from kissing before, but Vinyl was almost as excited from the thrill of getting Rarity to fool around with another mare as she was from the physical act of what they were doing.

They were far from the only ponies in the VIP area that were making out more than they were dancing. Other pairs and even trios of ponies were pressed together, noisily kissing. One mare had her tail hiked all the way up, presenting her wet marehood shamelessly visible for all to see.

Vinyl broke from the kiss, staring at the same mare as Rarity. "Damn," she said, "She looks like she's having a good time."

"She's not the only one," Rarity teased, indicating Vinyl's tail. The DJ's own tail was moving about. She was getting close to presenting her own marehood to the collected VIPs.

Rarity considered, "Maybe we ought to slow down, in the interest of your own modesty?"

That got only a laugh out of Vinyl. "Somehow, I think everypony else is a little too distracted for that to be a big deal," she said. "But if you want to take this somewhere more private," she continued, bringing her mouth in close to Rarity's ear, "There's a room in the back of this club we could sneak off to."

A breath caught in Rarity's throat. If Vinyl was suggesting what she thought...

"What exactly are you planning on doing once we're back there?" She needn't have asked. Vinyl's carnal intentions were obvious.

"I'll put it this way," Vinyl answered. "As beautiful as that dress you're wearing is, I'd love to see what it looks like tossed on the floor."

"Flattery," Rarity said, "will get you nowhere." That was a lie, of course. Rarity knew that flattery could get one anywhere they wished. In this case, flattery was about to get Vinyl alone in a back room with Rarity.

The music was so loud that Rarity could still hear it in the back room of the club. "I can't believe we're really doing this," Rarity said, still amazed that Vinyl had persuaded her to be so adventurous. She was in uncharted waters here.

It wasn't like she was some clueless virgin, but she just wasn't experienced with impromptu trysts like this, and never with another mare. Thankfully, Vinyl took the initiative. The DJ came in close, half kissing, half biting at her ear.

"Vinyl, Stop!" Rarity squealed, not really meaning it. "I'm ticklish there!"

Instead of stopping, Vinyl only redoubled her efforts, burying her nose into Rarity's coat like a pig digging for truffles. "Let's see where else you're ticklish," she purred. The DJ dotted a line of kisses along the edge of Rarity's dress.

*Smooch* *Smooch* *Smooch*

Rarity was shocked at how much Vinyl was riling her up, how her ministrations were different from a stallion's. They were so much more intense in so many ways. There was an attentiveness, an attunement to her own feelings that stallions never seemed to have. Vinyl was positively ravishing her with kisses and love bites. She realized that, had it not been for her dress, her tail would have hiked right up to present her nethers.

A warm blush came to her cheeks as she felt the wetness of her marehood start to soak into the fabric of her dress. "Is my lovely lady feeling a little hot under the collar?" Vinyl teased, seeing the color that rushed to Rarity's face. She nipped at Rarity's neck, playing on her words.

"Sorry," Rarity apologized. "This is my first time doing this. With another mare, I mean."

Vinyl's ears perked up at that. "What, you've never...experimented?"

"No."

But the DJ didn't seem put off at all. In fact, she seemed more ardent than before. "You're telling me that a mare as pretty as you has been keeping herself from other mares all her life? Dude, that's just unfair!" Slapping herself on the forehead, she added, "Sweet Celestia, I feel like I'm talking to somepony who's never listened to club music before. Aren't you a little curious?"

"I think this is a bit more significant than trying out a different genre of music," Rarity protested.

"No duh," Vinyl retorted, "Now I've got, like, a duty to rock your world!" She kissed Rarity again, mashing her lips against her with such fervor that she had to step back. Her rear hooves bumped against a sofa.

"Get on the couch," Vinyl said. "I've been admiring that dress for a while. But for all its pretty ribbons, it's time for me to unwrap that box." She gave a laugh that was almost a purr, delighted at her own double-entendre.

Things were moving fast. Learning that Rarity was a virgin when it came to other mares had made Vinyl all the more determined to fuck her. Nevertheless, Rarity obeyed, laying on her back.

Her hooves reflexively moved to cover her body, but Vinyl nudged them out of the way. "Don't cover yourself up like that, babe," she said. She dotted another line of kisses down Rarity's barrel before her mouth found its way between her hind legs. "I'm going to show you just how much better things are when you pitch for the home team."

With a magical glow, she grabbed the hem of Rarity's dress and lifted it up, giving herself an eyeful of the fashionista's pussy. She grinned at the embarrassed mare. "Nice to see that you're just as pretty with the dress off," she teased.

"Thank you," Rarity said, not knowing how else to respond to the compliment. The DJ's head was obscured from Rarity's vision by the hiked-up dress as she brought her face close to Rarity's glistening marehood. Her breath caught as one of Vinyl's hooves touched her, spreading her lips apart to give the DJ a complete view of her most delicate area.

The air began to pulse with magical, musical energy as Vinyl's horn glowed. A magical orb the size of an egg appeared above Vinyl's horn, the aura around both of them throbbing rhythmically. "I have to say," Vinyl said, "It's an honor to be the mare who gets to expand your horizons." Then she bent down, tracing her tongue along Rarity's folds.

A shock of pleasure ran through her body. Her skin prickled, as if somepony had just pressed an ice cube against her. The feeling she had as Vinyl's tongue ran over her labia from bottom to top was electrifying. All the while, the pulsing orb of magic glowed, spinning like a disco ball.

"What's that thing f--for?" Rarity gasped out, trying to brace herself against Vinyl's oral assault.

Vinyl muffled her laughter between Rarity's legs before answering, "That's my secret weapon." Demonstrating, the orb lowered down to Rarity's marehood, nestling itself against her clit.

*Brrrr* *Brrrr* *Brrrr* *Brrrr*

"Holy shit!" Rarity yelped as it began to vibrate, pulsing to the beat of the song that could be heard even from the back rooms of the club. It felt like her whole body reverberated with the magic vibrator.

"Pretty nifty, huh?" Vinyl returned to her task of licking Rarity's pussy, tracing out the alphabet with her tongue. A moan escaped her mouth every time The DJ's tongue flicked up to bring her tongue stud close to the vibrating orb. Whatever it was made of, it resonated in sync with the vibrations, buzzing her clit from both sides.

"Darling, that feels absolutely wonderful." Rarity expected that hearing that, Vinyl would redouble her efforts on what she was already doing. Instead, she removed her tongue and the magic vibrator, but not before planting a passionate kiss on Rarity's dripping delta.

"Why did you stop?" Rarity asked as Vinyl lifted herself up and moved around.

"You sounded like you were about to cum," she explained. "And as much as I'm looking forward to seeing that, I thought it was about time you got a taste of pussy too."

Vinyl straddled her head, giving Rarity an unadulterated view of her marehood. The hot, wet gash of pink was sandwiched between a pair of flanks as white and elegant as Rarity's own. It was shockingly familiar, with the sole exception that Vinyl had a landing strip of thicker, cobalt fur leading to her pussy.

"Well, what are you waiting for?" Vinyl swayed her hips in a circle, her tail helicoptering around and fanning the smell of her sex into the air. "Are you going to just bask in its glory, or are you going to eat my pussy?"

Rarity blushed but nonetheless did what was expected of her. She didn't know exactly where to start, as if she had just been served an exotic dish she didn't recognize.

Vinyl cooed as Rarity kissed her pussy, not much different from the kiss they had shared on the dance floor. "Aww, that's sweet," she teased. "But don't be afraid to slip in some tongue!"

Taking her own advice, Vinyl leaned down and sank her own tongue into Rarity's honeypot. She went through all the same motions as before, but now they were inverted. The moan that rose from Rarity's throat hummed into Vinyl's own marehood, spurring her to press on, following Vinyl's lead.

Between licks, Vinyl said, "You're pretty good at doing this, for your first time muff-diving." The blush that came to Rarity's cheeks was hidden, as her face was pressed between Vinyl's thighs. Still, the compliment emboldened her to put her own spin on things, teasing the DJ's clit with the tip of her tongue.

"*Mmh*...Fuck, babe," Vinyl groaned. "Pussy-eating that good deserves a reward." With a glow of her horn, the magic vibe appeared again, pushing against Rarity's lips. As it pulsed against her, Vinyl moved it in circles, up Rarity's right labia, down the left one, and back up. She followed the orb with her tongue, running it along the same path as if she were chasing it. Whenever she got close, her tongue stud began to shake again, resonating with the vibrations.

Rarity's back arched, her chest heaving with deep, passionate breaths. She had never felt pleasure quite like this. It barely occurred to her that she was neglecting her end of the bargain, having been distracted from licking Vinyl's snatch. Still, the DJ could tell she was about to push Rarity over the edge and into the throes of orgasm.

For a moment, everything crystallized into a perfect feeling of ecstasy. Rarity's mouth opened in a silent scream as her legs shuddered, cumming on Vinyl's snout. She was usually more dignified when she came, but her first time with another mare had reduced her to a sloppy, squirting mess. Wetness erupted from her entrance, splashing on the fabric of her dress. Vinyl took it in stride, enjoying the spray as much as if it had been a champagne bottle.

There were only seconds of reprieve, however. Vinyl swung her head around, her face dripping with squirt, and said, "I won't ask if you were satisfied. Clearly, you were. But, uh, I think you've forgotten something?"

She shifted her position, sitting on Rarity's face. "That's always the problem with sixty-nining. Somepony always loses focus before the other one does. But don't worry," she said as she ground her pussy against Rarity's face, "I'll help you finish me off."

Vinyl brought the magic vibrator to her own clit as rocked back and forth, and in minutes she came too, squeezing Rarity's head with her thighs as her hips bucked. The whole ordeal left Rarity's mane in a mess. Rarity had to admit to herself that under normal circumstances she'd be furious. Given how hard Vinyl had just rocked her world, she found it in her heart to forgive her. After all, she could always simply re-style it.

Vinyl rolled off of Rarity, tumbling onto the floor in a heap. "So," she asked,"...thoughts?"

"That was...that wasn't like anything I've ever had before," Rarity panted.

That brought a grin to Vinyl's face. "Damn straight! So, after that are you considering boinking other mares on a more regular basis?" She wagged her tongue lewdly before adding, "Because if you are, I can give you backstage passes to some shows I have lined up in Canterlot."

But before Rarity could answer, there was a knocking on the door. Pinkie's voice came from the other side, calling out, "Rarity? Where did you get off to?"

The door slammed open. Rarity gave a little scream, trying to protect her modesty by bunching up her dress to cover her still-wet nethers as Pinkie bounced in.

"Hey everypony, where are all my white mares at!" Surveying the scene, Pinkie gave her blushing friend a stern look. "Rarity, this is a fancy party! And here I find you, hooking up with a mare in a back room? Tsk-tsk, not very ladylike. Not very ladylike at all."

Rarity had no reply, but Pinkie continued lecturing her. "The polite thing to do would have been to ask to hook up with me first! I mean, I was the one who told you about this party. You could have at least invited me to join in the fun!"

Vinyl answered for the speechless fashionista. "Sorry, Pinkie." Giving Rarity a look rife with implications of future debauchery, she added, "We'll be sure to remember that...for next time."