Rainbows and Marshmallows

by Dark_Star777

Rating: mature
Tags: Anthro, My Little Pony: Friendship is Magic, Rainbow Dash, Porn, Sex, Rarity, Slice of Life
Length: 3607

Rarity has Rainbow Dash try on a dress, then they have sex. Funny how fast things manage to escalate, isn't it?

Rarity and Rainbow Dash, a prim and proper fashion pony and a total tomboy that can't stand being girly. Exactly how could two opposite ends possibly meet? Rarity isn't interested in a relationship with such a ruffian, and naturally, Rainbow Dash isn't into prissy types either, but somehow, some way, those two have an odd feeling like they're going to end up in each other's arms one night.

Contains: Lesbianism, strapons, and lots of moaning

This story was done as a commission.

Published 2018-03-23 01:20:07 UTC
Last updated 2018-03-23 01:20:07 UTC

Dress for Success

It was relatively early in the afternoon when Rainbow Dash found herself touching down at Carousel Boutique. She sighed to herself as she looked at the building, a familiar sight to her and all of her friends, and practical castle to the wannabe princess inside that Rarity often acted like. A stray thought inside of Rainbow's mind wondered what would happen if Rarity really were an alicorn, just what it would be that she did with all of that power and magic. The prismatic pegasus just shuddered at the thought of it and opened up the door, walking inside right away.

She looked at the receptionist desk at the front and found nobody there, or rather, she found Opal sitting there with a bored, catty expression on her face. The cat looked as though she was actually expecting something far more entertaining to happen as she nestled into her cat bed atop the desk, licking a paw and dragging it across her face, cleaning herself up a little. Rainbow had never been one for cats. Sure, they were fluffy and all, but they couldn't beat Tank. She smiled a little at the thought of her tortoise, giggling at it as she had to take a moment to remember what she had come in for. Her smile faded somewhat and she sighed, her wings ruffling just a tiny bit and her tail swaying at the thought of it.

"Hey, Rarity! You in here?" Rainbow called out, wanting to get the attention of the fashion pony. She had called Rainbow in to try and find a way to dress her up in something special. Sure, Rainbow still had the two formal gowns that she wore to the last two Grand Galloping Galas and all, but she didn't have anything permanent. Of course, she had the very unfortunate timing to bring this up around Rarity. Why exactly bring it up at all, Rainbow knew people would ask. Well, it was because of how Twilight and Fluttershy had been talking about it, of course. She didn't want to bring up anything like that, but she still opened up her big mouth and found herself being told to come in the next day over and get fitted for a new dress of some kind. Her regretful thought process had been interrupted when she had heard some high heels clacking on hard-wood stairs.

"Coming!" sang Rarity, clearly having been in a good mood for some time. It didn't take long before Rainbow could see the fashionista show up, dressed in a decently business-savvy outfit; she wore a periwinkle blouse with a short, black skirt and black high heels. Her mane and her tail looked as though they were perfectly in place, brushed through multiple times and made to look good every single time she had ever been seen in public. A part of Rainbow wondered if she had been using magic to make her hair look good like that, but she didn't think that Rarity was the type.

"Ah, there you are, darling. Oh, I simply cannot wait to get you into something nice and frilly today!" Rarity teased, giggling to herself as Rainbow just sighed and rolled her eyes at her.

"Yeah, yeah, let's just get this over with" Rainbow responded, but that only managed to make the tittering of Rarity's laughter even more cheerful than before. If she didn't know any better, she'd say that Rarity was waiting for a moment such as this to happen.

"Come now, Rainbow, you know that you're allowed to be a little bit more....How do I put this?"

"Girly?"

"-Yes, that'll work. Everyone is allowed to be a little bit effeminate at some point or another. There's nothing wrong with getting in touch with yourself" Rarity then answered, keeping her proud smile as it was. "Why, why some luck, we may find a way to make you look pretty on a daily basis" the fashion unicorn smiled, but Rainbow was just frowning at her harder already.

"Yeah, no. It's not that I don't wanna be girly, it's just that it's not something I do. Like, we all know how awesome I am, but it's kinda hard to be awesome prancing around in 'pretty little dresses'. Er....No offense" Rainbow then chuckled as Rarity just playfully rolled her eyes.

"None taken, though I do at least want to see what you look like casually dolled up, as opposed to simply dressing for a major formal event" Rarity then answered, setting a delicate, white hand upon Rainbow's blue shoulder, looking her deep in her fuchsia eyes. "Especially considering that the alternative is something so...boyish" she then added as Rainbow just blinked at her at that.

"Nothing wrong with this, as far as I'm concerned" Rainbow answered, just the tiniest bit of pink gracing her cheeks as the camera zoomed out to show off just what she was wearing for the day. One would think that the pegasus had simply rolled out of bed wearing what she was, considering it was a plain white tank top with little slits in the back for her wings, as well as some black, skintight boy-shorts with her poofy tail sticking out of the back. It also didn't help that her hair was just unimaginably messy, looking as though she hadn't actually brushed it in months. Truly, this was Rainbow Dash at her finest.

"Be that as it may, it would certainly help us both if we made you look just the teeniest bit more...well, pretty" Rarity mused, Rainbow just rolling her eyes at her friend in response.

"Look, let's just get this over with, alright?" Rainbow said as she looked up at the stairs, her wings fluffing themselves behind her back. Rarity just smiled.

"Yes, I suppose we should" Rarity said with a gentle sigh as she soon started heading upstairs in front of Rainbow, the latter just putting on a gentle smile. She couldn't really stay mad at one of her friends, even when Rarity was just being....Rarity. But hey, at least there was an amazing view of her ass going up stairs. Rarity never seemed to know it, but she easily had one of the best asses of anyone in Ponyville. Applejack's was super firm and muscular, but still managed to have enough bounce to it to flick a bit off of. Fluttershy had an unfairly perfect figure no matter what she did or what she ate, Twilight was a princess, so her ass was on another level, Pinkie was just like Fluttershy, only puffier without even the slightest sign of body fat, but Rarity was still probably the queen.

The tight black fabric of her work skirt managed to make the perfect cover as it covered Rarity's creamy white flesh. Such an ass was always a delight to look at, even if the pony attached to it was the exact opposite of what Rainbow herself liked. It stretched somewhat as she moved up the stairs in practical slow motion, each step making those cheeks sway beautifully as her tail practically teased her nose. It felt like ages before the two of them had somehow managed to get upstairs and into Rarity's workshop of sorts.

"I hope you don't mind, but I went ahead and made something that I believe even you might like" Rarity mused as she opened up the door. On the inside of the room, Rainbow immediately caught sight of the slim, fuchsia sundress in the center of the room. It was relatively simple in design, having a decently short skirt to it and a slim top, covering up most of her chest. It even had some short sleeves to it, just to make it easy to move around. "I have all your measurements on file, so I decided to make something simple and fast to put on" she then added, walking into the room. Rainbow just groaned out and followed her inside.

"Okay, so can I just put this on over what I've got now?" Rainbow asked, thinking that she could actually get it on without having to worry too much about anything else.

"Absolutely not! Just go ahead and change behind the cover over there, you know that it's the only way to really know whether or not it looks good" Rarity answered, making the pegasus groan as she went over behind the red covers. She soon started undressing herself as she started with her top, exposing her relatively small breasts and lack of a bra. What she lacked in physique, she made up for in other features. She soon pulled down her black shorts and revealed her dark blue panties as well, albeit her butt wasn't nearly as big and attractive as the other mare in the room. Instead, hers was toned and athletic, looking perfectly fine in its own right. Everyone knew that a woman didn't need big tiddies or anything to look good.

The dress itself was pretty simple to put on, having obviously been meant to be slipped on and off without any real difficulty in mind. She looked it over to make sure that she had it on right, making certain that there wasn't something sticking out as she slipped her wings through the slits in the back, her tail managing to be a problem in its own right before eventually getting it through the hole in the back. She fluffed it up a little bit and sighed, eventually stepping out to the sound of a camera snapping a shot of her in it.

"There we go, another precious little memory" Rarity giggled happily as Rainbow was fuming visibly.

"You better not plan on showing that to anyone!" Dash threatened as Rarity just flashed her an innocent smirk.

"No need to worry about it, it's just a little something I plan on looking at at a later time. I never really get the chance to have such pictures of you, but it's certainly nice to have one now" the fashion pony smiled happily, Rainbow just sighing to herself as she stood still, knowing that Rarity always enjoyed doing a once-over to make sure her work looked good on someone.

"Can you just get this over with, I wanna get outta this as soon as I can" Dash complained, obviously lacking any real sense of patience. Rarity didn't seem to mind though, lifting up one of the pegasus' wings to examine them carefully, smiling as she hummed a merry little tune. Rainbow could've sworn that she had heard it somewhere before, but didn't pay it any mind. She just let Rarity do her job and focused on just getting out of this dress and moving on to the next major thing she wanted to do for the day. Thankfully for her, Rarity seemed to be finishing up her job within mere minutes. Before she knew it, Rarity was happily walking away, a glow from her horn summoning forth a pad of paper and a pen to jot down whatever notes she figured were important. That just left Rainbow with an increased desire to get out of the dress.

"Well, this was certainly a nice moment. Feel free to take that dress with you back home" Rarity smiled, just watching as Rainbow casually stripped herself down in front of her, blushing ever so slightly as the athletic mare did so. "I didn't think you were quite so bold to do that" she said with a sly smirk.

"Yeah, yeah. Thanks for the dress, even though I'm never gonna wear it" Rainbow quickly said as she went over to the changing barrier, bending over slightly as she felt something come up and whack her right on the ass. Right away, her eyes went wide as she shot up into the ceiling, her wings flapping as hard as her face was red. "W-what the hell was that over?" she then asked, looking over to see Rarity having whapped her using her magic, holding up a rolled-up newspaper.

"Consider it my way of paying you back. I've noticed the way that you stare at my ass when we go up the stairs" Rarity smirked happily, making Rainbow blush further. "As a matter of fact, I'd say I was quite flattered. Of course, you could always simply ask me and I'd likely let you see more" she then said so seriously, Rainbow almost thought that she was serious. Of course, the laughter that she heard from the unicorn had managed to blow that theory away. "Oh, if only that was how I thought. Could you imagine?" Rarity then asked as Rainbow landed on the floor of the room, rolling her eyes as she collected her clothes and started to re-dress herself.

"Guess it would kinda be better than a prissy mare that's over-dramatic" Rainbow snorted somewhat, though she did feel a little bit weirded out when she saw Rarity cover up the window leading into her room, the curtains drawing themselves over it rather quickly as she also looked over towards Rarity, somewhat confused.

"It would be unusual, but I guess if anything were to come of it, you'd definitely see me in a different way. I've always thought that you and I never really saw eye-to-eye in the first place though, but perhaps I should give you some sort of reward for making you do something you clearly didn't like. Maybe then, you might be able to leave here with a smile on your face for once, as opposed to a simple scowl or a frown" Rarity then commented, making Rainbow do a double-take. This was starting to escalate rather quickly, as she watched her friend quickly stand up and begin to saunter on towards Rainbow, smiling somewhat as she quickly set a hand on her shoulder and dragged her in close for a hug, pressing herself tight against her, smooshing her firm, fluffy breasts into her blue friend with a little moan. After that, she lidded her eyes gently and backed up a bit.

"Feeling better, Dashie?" Rarity asked, Rainbow nodding very quickly with an all-red face. Rarity just smirked to herself as she noted this expression very clearly, amused at the sight alone. Dash just looked around a little bit, shyly trying to find a way to bring up the idea of hers.

"So....You, uh....You weren't actually serious about doing...stuff, were you?" Rainbow had asked her, avoiding making eye contact as Rarity just tried to get back into eye contact with her.

"There's nothing saying that we can't. I just that you're prepared to handle it" Rarity said simply, a confident smirk on her face as Rainbow just gulped somewhat. Something told her that things were about to get interesting.

Rainbow fell back against the bed with an audible 'oof!' as she laid down upon it, completely naked as she looked back to the mare who had managed to throw her onto it, seeing Rarity saunter on up to her with a lovely grin, but her own naked body was something to behold. A perfectly skinny waistline, big, D-cup breasts, and hips so wide, she was amazed that anything was even in her size sometimes. She sauntered on closer towards the bed and laid down upon Dash's prone body, kissing the pegasus rather strongly as the two of them embraced, both of them heated up between the legs right away as fingers started to press against Rainbow's body. Rarity was taking control in ways that Rainbow had never figured she ever would, and it turned her on to no end.

"Oooh, you make such sweet little noises when you're pleased" Rarity moaned out happily as Rainbow tried to fight back the feeling of pleasure, but moaned out as she powerlessly accepted the feeling of Rarity's fingers penetrating her precious little pussy, the moist digits forcing themselves up her hole and making her eyes roll back into her head. Rarity herself could all but be felt smiling as Rainbow just accepted it, feeling the pleasure build up as Rarity rolled her tongue across her small breasts, her pink nipples standing at attention as Rarity worked her whole body. The unicorn quickly got up and actually rested herself upon Rainbow's chest, leaning back and spreading her legs out further as her own glistening jewel was showing. Rarity kept on fingering Rainbow's cunt though, smirking to herself as she pushed her digits in as deep as she could get them. Rainbow just kept on panting, trying her hardest to keep from moaning out any further, gritting her teeth and shutting her eyes as she felt Rarity's hot pussy fast approaching her face, shoving her muzzle deep into it as she suddenly tasted her. Rarity didn't let her have much a chance to eat her out though, backing up and pulling her fingers out of her before shoving them into Rainbow's mouth.

"Yes, taste yourself. Aren't you just so sweet?" Rarity purred happily, her tail swaying about happily as she soon got off of her friend, going over to the nightstand to grab something, but also to give Rainbow a few of the booty that she loved so much. When she turned around, she had been trailing her fingers over a 20-inch rubber horsecock attached to a thin, black thong, smiling to herself as Rainbow immediately knew what she'd be doing with it. "That's right, I'll be using this now" Rarity smirked happily, sitting up happily as she slid the miracle tool up her legs, the thong clamping tight between her cheeks as she gave her ass a little shake, standing up and over the edge of the bed with a big grin on her face. She sauntered on closer and started to rub Rainbow's pussy entrance with the dildo head, amused at the sights of such pretty, pink lips quivering at the sensations.

"Is it too late to say no?" Rainbow tried to plead, only to be thrust into as her eyes went wide. She could already feel half of it entering deep into her before all the wind was knocked out of her.

"As a matter of fact, it is" Rarity smiled happily as she held up Rainbow's legs with her magic, lifting them up and spreading them out to better allow her some level of access. Rainbow moaned out as she felt her body burn, her pussy muscles clamping down tightly upon the rod inside of her, something that Rarity was all to happy to use on her. She started to thrust into her, going slowly at first as she noticed the ways that Rainbow's body reacted. She could just feel how incredibly tight her insides were. Were this a real cock, she'd love the sensations even further, but the unicorn could easily settle on plastic and rubber instead. She began to thrust just a little bit faster as she felt some vigor going into her hips, holding onto Rainbow's legs with a little lick of her lips as she fucked her harder.

"Ahhh, ah, ahhhhh!" Rainbow moaned out as she felt her insides get all but punched by the rubber wonder. She wondered to herself just how badly she was getting stretched out, but she didn't care right now. She was horny, she was feeling it echo throughout her body, and she wanted to feel nothing but that inside. Nothing else mattered to her as she felt more and more slide into her. She forced one of her eyes open as she noticed the colossal bulge forming in her stomach from the dildo, thinking it was gonna hurt more whenever Rarity decided to pull out. Of course, considering just how much she was really feeling already, she could only imagine that it wouldn't last all that much longer. Right now, Rainbow couldn't tell if that was a good thing or not.

"Ooh, your moans really are sweet. It's incredible to hear such effeminate sounds coming from you, please let me listen to them a little bit longer" Rarity purred sensually as she played with a breast of hers, rolling the white globe around as she started to fuck harder, Rainbow moaning out louder with each one.

Of course, the harder that she thrust into her, the closer Rainbow got to the edge. Rarity noticed this right away and started to thrust in even harder than that, really forcing the plastic penis into her as Rainbow couldn't help but have her voice crescendo, letting out the girliest moan she was capable of as her internal muscles clasped the dildo, her juices spraying out violently afterwards. Rarity just giggled happily and gave Rainbow a big kiss as she pulled out of her.

"Feeling any better, Dashie?" Rarity asked her, to which Rainbow barely managed to nod her head to it. "Good, because it's my turn now, and I don't plan on letting you leave until you've left me satisfied" Rarity panted somewhat, a tiny bit winded as she stripped off the dildo herself and turned around, presenting her beautifully fluffy cheeks and spreading them out to show off her pussy. Rainbow just gulped at it as she slowly realized just how long a day this was going to be after all. Rarity smiled happily though, leaning over forward enough to see her upside-down face through her luscious thighs and wink at the camera, her pussy winking as well before fading to black.

Author's Note

That actually did escalate quickly, sorry if it feels rushed. Maybe I'll write out another chapter or so at some point, but I feel like this is a pretty good one on its own.