An Equestrian Fling

by Non Uberis

Rating: mature
Tags: Alternate Universe, Anthro, Drama, My Little Pony: Friendship is Magic, Romance, Equestria Girls, Porn, Sex, Fetish, Sunset Shimmer, Profanity, Twilight Sparkle (EqG)
Length: 7749

Sunset Shimmer and Twilight Sparkle want to push their relationship to the next level, but Sunset Shimmer has an idea to add in a little extra spice.

After going steady for several months, Sunset Shimmer and Twilight Sparkle decide that it's time to get a bit more hands-on with their relationship. Sunset Shimmer, however, thinks that it would be beneficial for them to take a vacation to Equestria to mark the occasion. Twilight Sparkle hesitantly agrees, not knowing the full extent to which ponies differ from humans.

Contains the following: human-to-anthro, mildly exorbitant proportions, sex, and nonsense plot-convenience worldbuilding.

All characters are mature adults.

Late for June, but it's never too late for pride.

Cover art by Suirano. (DB ID 2506060)

Published 2022-07-05 20:50:00 UTC
Last updated 2022-07-05 20:50:00 UTC

Through a Glass Lewdly

For what was the fifth time that day alone, Twilight Sparkle asked, “Are you sure about this, Sunset?”

As anyone would be as a result of having to deal with that kind of behavior ad nauseum, Sunset Shimmer was getting more than a little wound up about it. However, because she was nothing if not a supportive significant other, she would always do her best not to let that frustration show until the point when it was dramatically appropriate to have an outburst. So, with a soft but exasperated sigh, she turned and replied, “Of course, Twilight, everything’s going to be fine.”

Twilight Sparkle looked as she usually did: like she wanted to be convinced, but there remained something holding her back. “It’s just…it’s a whole new world, Sunset,” she said, biting her lip and shrinking away, “you can’t blame me for being nervous about that, can you?”

“I can blame you for suddenly getting cold feet when we’re literally five feet away from our boarding gate.” The fiery-haired woman gestured emphatically to the plinth in front of them. The platform was the stage for a statue of a horse (not to be confused with a pony) rearing back on its hinds, but the plinth itself was what really mattered to them. The four sides were decorated with mirrored surfaces, each seemingly perfectly identical to each other. This side on the back, however, in which they saw their reflections staring back at them, was the most important one, despite not appearing any different from the others.

Sunset Shimmer had privately come to ponder how it was that no one in this town had ever noticed anything amiss with the statue that was directly in front of the Canterlot College campus—surely someone ought to have stumbled through the portal while it was active at some point. It was on one of Twilight Sparkle’s (the other Twilight Sparkle, that is, the one who was a princess and didn’t wear her hair up or have cute glasses) visits, though, that it was determined there was an enchantment with roughly a twenty-meter radius around the statue projecting a sort of aura of disinterest, prompting any passersby not to pay attention to it unless they were already aware of the portal’s existence.

Twilight Sparkle looked down and blushed, embarrassed, however adorable the gesture might have been. She brushed at her hair and then fidgeted when her glasses started to slip away from their perch on her nose. “Sorry, Sunset,” she eventually admitted, clasping her hands together in front of her, “I just can’t help being…you know, worried.”

“Come on, Twilight, what’s there to worry about, really?” Sunset Shimmer asked with a bright, encouraging smile as she came to stand beside her, hooking an arm around her. “That other version of you has gone through this dozens of times now, don’t you think it’s time for you to do the same thing? Just a few more steps to go, and then we’ll have our summer vacation ahead of us. Just the two of us, for as long as we want.” She said this last part in a lower tone and a suggestive lilt that prompted Twilight Sparkle’s face to turn redder still, though she smiled sheepishly. She felt a twinge along her spine at the thought of how delightful she expected their vacation to be.

The two of them had been together for quite some time now. They were close to each other ever since Twilight Sparkle transferred from Crystal University across town, as had been necessitated by the turmoil that led to their meeting, but it had blossomed as the months went by. Of course, for all their smarts, neither of them was exactly a whiz when it came to interpersonal relations, so it had taken some coaxing from their friends to realize that the feeling they had for each other was the big capital-L love. Almost like turning a switch, that had been enough to get them both hanging onto each other at every turn, completely inseparable. Now they were starting to feel like it was time to take things to the next level.

But Sunset Shimmer had had an idea. She thought that it would be better to do so in a different venue, one that might be just a tad more exotic. It was something lurking at the back of her mind for some time, and she thought this would be the perfect occasion for it. Twilight Sparkle had hesitantly agreed.

Well, not counting the dozens of times she had nearly considered backing out in the final days leading up to their departure.

“I’m sure it’s going to be wonderful, Sunset,” Twilight Sparkle said, her expression now sitting at perhaps twenty percent of its usual anxiousness. “I’m just not sure that I’m ready, you know? I don’t even know anything about where we’re going!”

“This isn’t something you can just research your way out of, hon,” Sunset Shimmer replied with a smirk, widening when Twilight Sparkle balked at the idea of this. “It’s not like there are any books on Equestria in this dimension.”

“Okay, I know, but…are you sure we really don’t need to bring…anything?” She held her hand out to the side, where there might have been a luggage bag filled with supplies packed for the trip, ready for her to tote along with her, but instead there was nothing. “Not even clothes?”

“It’s fine,” she insisted, as if the idea of going on vacation somewhere, let alone to as distant a location as a completely different plane of reality, without supplies wasn’t absolutely ridiculous. Maybe it was to humans, but ponies had a different perspective, and she imagined that would become immediately obvious once they stepped through the portal. “Like I told you, we’ve already gotten the okay from Twi—I mean, you know, Princess Twilight, to have the whole castle in Ponyville to ourselves, and she’s left everything we’ll need to get set up.”

Twilight Sparkle bit her lip. She looked at the mirror on the back of the statue, the reflection of the two of them standing beside each other, near-opposites of each other in every way—cool contrasted with warm, nerdy with wild. Sunset Shimmer had always been among the most envied women at Canterlot College; no one would have expected her to fall for someone so slavishly devoted to books and studies. Sunset Shimmer herself probably wouldn’t have laid any bets on that either, and it was difficult coaxing Twilight Sparkle to crawl out of her shell, but that just meant more time for the two of them to spend together.

“Okay…I guess there’s nothing to be done about it,” she finally said, quiet, giving a sigh.

“That’s more like it, girl,” Sunset Shimmer chimed in, squeezing close, cheeks pressing together, sharing in their warmth.

Twilight Sparkle managed a wry smile as she leaned into the embrace. “Can you…go in together with me?”

At that, Sunset Shimmer’s smirk faltered. “I don’t know if we can,” she murmured thoughtfully, “there might be some danger of things getting mixed up if multiple people go through at the same time. I think it would be safer if we went separately.”

“Oh.” Twilight Sparkle deflated somewhat, but nonetheless she took a deep breath, and behind her glasses her eyes seemed mostly determined. Ten percent anxiousness now. “Well…alright, if that’s the way it has to be.”

“Do you want to try going first?” Sunset Shimmer asked gently, while giving her a nudge forward. “It might be a little uncomfortable, but it’ll be fine, I promise.”

But Twilight Sparkle almost immediately blurted out, “N-no!” Anxiousness spiking back up. “I-I mean…I’m fine with it, really, just…” She shrugged her shoulders, slipping out of the other woman’s grasp—Sunset Shimmer could have exerted more force to hold onto her, but she gave her the space she needed this time. “I’d like you to be on the other side, waiting for me, before I go through. I think I’ll need your help with all the…horse stuff.”

“Pony stuff,” Sunset Shimmer corrected. But she was primarily focused on studying Twilight Sparkle. “And you’re not just going to flake out on me once I’m through?” She was mostly teasing. Mostly.

“I promise, Sunset, I’ll be right after you,” Twilight Sparkle said, firm. The anxiousness was all but completely gone. Her posture was steady, her gaze unwavering.

Sunset Shimmer smiled. “Glad to hear it.” She approached her one more time, reaching out to tenderly touch her cheek. They looked in each other’s eyes for a few seconds. She was almost taken by surprise when Twilight Sparkle took the initiative and leaned in for the kiss, just a brief exchange of passion, lips locked, breath intermingling.

“I promise I’ll still love you as a…as a pony,” Twilight Sparkle whispered to her.

“Twi, hon.” Sunset Shimmer held her by the chin, keeping their eyes fixed on each other. “I promise you’re going to love being a pony.”

A smile spread across Twilight Sparkle’s cheeks, slowly but surely.

Then she broke away, starting to walk toward the mirror. “Don’t throw yourself in until you’re ready, okay?” Sunset Shimmer turned back to look over her shoulder with a devilish glint in her eyes. “But if you take more than a minute, I’m going to come back and drag you through myself, horrific transporter accidents be damned.”

Twilight Sparkle broke into a fit of snorts and giggles. “Oh, God, don’t even joke about that! I’ll go, don’t worry about it!”

“I’m not worried at all,” Sunset Shimmer replied with a chuckle.

In truth, she could barely contain her excitement as she stepped forward.

The reflective surface didn’t repel her when she walked face-first into it as a solid wall should have. Instead, it rippled like water, releasing flashes of light from within. To Sunset Shimmer’s perspective, she was looking at her reflection until her eyes passed through and then suddenly her retinas were being flooded with color. The portal pulled on her, yanking her forward the rest of the way, and the force only continued after that, like a black hole pulling her into atomic taffy. It wasn’t painful, but it certainly wasn’t pleasant either, though by now she was sufficiently accustomed to the sensations that it didn’t bother her. Twilight Sparkle likely wouldn’t be the same, and she almost regretted that she wouldn’t be able to witness her reaction as it happened.

The transition from the human world to Equestria was so much better than the other way around. She had spent long enough living here that she had gotten used to it, but any time she went through the portal she was met with the surge of magic invigorating her as her body bubbled and buckled, structure changing on both physical and spiritual levels, whereas the return trip just made it apparent how she was being sapped of the vitality she was accustomed to. Some days she wondered why she continued to bother with her self-imposed exile, now that she had no reason to doubt that she wouldn’t be accepted if she came home. It was only her friends, especially Twilight Sparkle, that kept her. Perhaps after this vacation, though, she could begin convincing her to make a permanent move. But that would have to wait until later. There were about to be more pressing concerns very shortly.

Time, too, seemed stretched, so that the time it took to go through the magical passage felt longer than it actually was. The one part of the transition Sunset Shimmer still had difficulty with was the exit; one moment she was swirling through the chaotic ether, the next she was walking again, and it took a great deal of dexterity and concentration to land the first step and then naturally continue on to the next, to walk out of the portal instead of haphazardly stumbling and falling face-first in an impact far worse than walking into a wall would have been. This was made all the worse by the fact that she found herself stepping down not with a foot but a far narrower hoof, the joints of her leg having shifted. Instincts wrestled with each other, but in the end she managed only a slight wobble, and then she was clopping along as easily as anyone—anypony, rather, she mentally corrected—on this side of the mirror would.

Sunset Shimmer took in a deep breath of the cool air that was wafting over her body—her fur, a coat far thicker than the hair on human skin. Not exactly fresh air, heavy with the old scent of books, the shelves of Princess Twilight’s library standing all around her, but even that was so much cleaner than the air she was used to, so vibrant, so refreshing. It reactivated the dormant ley lines within her, the power that was inherent in ponies, instilled within them by their magic. She stretched her limbs and her new (technically old) tail flicked, ears swiveling, air rushing through the nasal passages of her snout, and gave out a long groan of satisfaction. She felt her reawakening most strongly in two parts of her body. The first was her forehead, where her horn was, the source of her magical power, and without even thinking she produced a few crackling teal sparks—this was so much more potent than the power she had in the human world, offering far more potential for her than merely reading minds.

The second locus was farther down, where she already felt the growing heat of the furnace between her legs. She squeezed her thighs together and ground, gyrating her hips, and her tongue emerged to lick at her lips. It had been so very long. She would just have to wait a little longer to get somepony to be on the receiving end of her desires.

Although, in turning back to the mirror, Sunset Shimmer realized that she hadn’t exactly been keeping track of the time, and there was no longer a watch on her wrist or a phone in her pocket—or even any pockets at all—to tell her what the time was. Had Twilight Sparkle’s designated minute passed yet? She was willing to be patient, but only to an extent. At this point, going back through the mirror to fetch her would be a mood killer, to say the very least. Her hoof tapped on the floor while she crossed her arms, staring at the surface of the mirror which stood in the center of the floor. There was some solace to be had in looking at her reflection; Sunset Shimmer was not exactly a vain pony (or person), but she was in a somewhat unique position, being somepony who primarily inhabited the human world, having grown used to their customs and the way of life that was necessitated by her being there, so during these visits she had a better appreciation for the features of her pony form, especially the way she was so much—

The mirror rippled like a pool of water, distorting the image of the orange mare before morphing completely into a white aperture. “Well what do you know, she worked up the backbone for it after all,” Sunset Shimmer remarked to herself with a grin. Then she prepared herself, bracing her hooves. It was all too likely that Twilight Sparkle wasn’t going to have such a graceful entrance, and she would need the hands of somepony capable and familiar to ensure that she didn’t hurt her pretty little—

A lavender shape emerged all too quickly. Sunset Shimmer would later reflect, from the way the hooves came down, that it looked like Twilight Sparkle had been running into the mirror. Perhaps she was anxious to get it over with and thought that would expedite the process. Now she was careening out like a cannonball. Sunset Shimmer only dimly had time to identify a face, familiar despite the new anatomical structure, with glasses and a mane that was still tied up in the back.

And there was something else. Something that she saw folding outwards. Something that definitely shouldn’t have been there.

But that was all she got to see before Twilight Sparkle leapt from the top of the pedestal the mirror was mounted on, momentum carrying her forward, and she crashed directly into Sunset Shimmer. It wasn’t so bad, for a moment, as there was some cushy softness pushed directly against her face. Then gravity asserted itself over them, and they both went tumbling backward, and Sunset Shimmer found herself crushed and smothered as she landed on the unforgiving floor.

“Oh…I…wh-what…?” Twilight Sparkle’s stammering voice was coming from somewhere. The sound was muffled to Sunset Shimer, her ears blocked by flesh. “Whoa, what is…?” That was probably the sound of Twilight Sparkle noticing that she had a muzzle, and Sunset Shimmer was missing it because she was buried in a faceful of boob.

“Hey, Princess, you wanna get off of me?” she asked, though it came out more indistinct than that, so to make sure the message came across she reached out to slap at whatever was closest.

(why does it feel like feathers?)

“O-oh, Sunset, I’m sorry!” She was probably blushing as she realized what had happened, and then the weight diminished when she rose.

Sunset Shimmer sputtered and gasped for breath once she was free, propping herself up on her elbows. She still felt their skin touching—Twilight Sparkle was straddling her. Well, not exactly the way she had imagined this going, but it might be something entertaining to try. “Sunset…you’re…” She sounded shocked, breathless. No doubt Twilight Sparkle was still floundering with grasping all of this; she was a woman of the sciences if nothing else, and even after numerous brushes with supernatural forces from Equestria she was still prone to being taken aback by these inexplicable developments.

Then Sunset Shimmer opened her eyes, just in time to see that the other mare’s gaze was shifting downward. “You’re…naked,” she said plainly as her eyes settled upon her chest. Sunset Shimmer was again conscious of how suggestive a position she was in, her back flat on the (not particularly comfortable) floor, arms lying limp, completely prone, and her exposed breasts flopped out for all to see. No doubt she was in awe of their enormity. Though the two of them had never been in such an intimate engagement as this, they had indeed seen each other naked, usually in the venue of changing rooms, but Twilight Sparkle wouldn’t have needed that to know that Sunset Shimmer wasn’t supposed to be this stacked. The orange mare’s breasts looked like they would have strained any shirt she tried to wear or overflowed any hand that grasped them, nearly as large as her head. She saw the other mare’s face reddening deeper and deeper, perhaps imagining what she might want to do with those breasts. Fortunately for her, Sunset Shimmer would be plenty accommodating, provided she was willing to do so in turn.

Breaking her out of her trance, the unicorn mused sultrily, “Maybe you should be more concerned with yourself, Twi.”

“My…” Twilight Sparkle looked even further down, and now she registered the purple mass that extended out from her. Her hands clasped at the sides of her bosom in disbelief, and then she promptly gasped and recoiled as a shiver rocked through her, no doubt from the stimulation that had erupted along her nerves. Her unrestrained bosom jiggled, like two water balloons full of gelatin. Her face was now more red than purple as she struggled to cover herself, fighting with the globes’ breadth to reach her arms around them—she couldn’t even conceal the deep amethyst of her areoles.

It was mostly the way Sunset Shimmer had envisioned this discovery taking place, so she chuckled, mirth overriding her arousal.

That lasted for all of a few seconds before something odd occurred to her.

Sunset Shimmer had been eagerly looking forward to this, certain that Twilight Sparkle’s equine form would be bustier than she had been as a human. Now, however, she was discovering that the increase had been astronomically greater than she predicted; where before she was used to being modestly more endowed than the petit nerd girl, now Twilight Sparkle looked like her breasts were twice the size of her own. No wonder she had felt like she was being smothered, one could smuggle grapefruits in between those things. What could have caused a development like this?

Maybe it had something to do with her being an alicorn.

(…wait, what?)

Sunset Shimmer blinked, and then blinked a few more times to be sure that she wasn’t seeing things. She had been so preoccupied with ogling her girlfriend’s tits that she didn’t even notice a far more pressing addition to her form. Extending out from her back at stiff, awkward angles, there were two feathered lavender wings. These were in addition to the spiraling horn that was on her forehead, sticking up through her mane, not in place of it, and that could only mean one thing.

“Twilight, why are you an alicorn?” Sunset Shimmer asked, not entirely conscious of the indignance creeping into her tone or her brow creasing.

“An ali…a what?!” Twilight Sparkle stammered incredulously, ears folding back. “Sunset, why are we naked?! Why are our boobs so huge?! Why am I so—?!” Her muzzle scrunched up at the same time that she squeezed her thighs together, knees knocking. Her legs were also a great deal thicker than they had been before, hips flaring out dramatically toward the sides, thighs that were each as thick as her whole waist had once been, if not more so. Sunset Shimmer didn’t need to look to know that that was bigger than her own plusher bottom half; those were thighs that could crush a skull between them. “Why am I so horny?!” she finally demanded.

“Well of course you are, you’re a pony now!” Sunset Shimmer said, as if it should have been obvious.

“I’m…what…what’s that supposed to mean?!” But in the midst of her sputtering, Twilight Sparkle’s eyes lit up with terrible realization. “You…you knew this was going to happen?!”

“Well of course I did! I’m a native of Equestria, I’ve been here for most of my life!”

“And you didn’t think it would be pertinent to tell me that going through the mirror would turn us into blown-up bimbos?!”

“I didn’t think you’d turn into an alicorn! I was supposed to have you edging on climax right now!”

“Sunset, you can’t just…sex away whatever this is!”

Sunset Shimmer threw up her hands in the air and turned away, and Twilight Sparkle did the same.

Ah, their first real lovers’ quarrel, how romantic, just what this getaway really needed.

Then Twilight Sparkle quietly, coldly asked, “Did you want to do this because you don’t think I’m attractive enough as a human?”

Sunset Shimmer whirled about as if she had been struck. “What?”

When the lavender mare turned to face her, there was a mixture of hurt and anger in her eyes. “Did you not think I’m good enough for you? Did you bring me here so I could be more fuckable?”

“No, I…” But Sunset Shimmer pursed her lips as she realized the truth that was dancing on the tip of her tongue. Her shoulders slumped and her mane cast over her face. “It’s not…because I don’t like you Twilight. I love everything about you, including the way you look, as a human. It’s just…well, you asked me if I wanted to get more serious with you, and when it comes to sex I’m more comfortable as a pony, in Equestria. I thought maybe you’d get a kick out of coming here too to try that.”

“Sunset, I’ve never had sex, what made you think it’d be easier for me if I was a horse with boobs bigger than my head?”

Sunset Shimmer grimaced. Even though she was more comfortable with sex as a pony, that certainly didn’t mean she’d never engaged in sex as a human. Especially so in the early years of her self-imposed exile, when she had to do everything in her power to gain social standing in Canterlot College, or even to butter up some of the staff to be more amenable to her. She wasn’t so proud of that behavior nowadays, even with the flaring of her libido ebbing in and out like the tides.

She was conscious of that right now. Even as she fought to keep herself in check, she was burning up inside, her loins aflame, her heart racing. Her labored breath echoed in her skull, but it wasn’t loud enough that she couldn’t also hear similar sounds emanating from Twilight Sparkle, fighting with her own stimulation, gasping and wincing under her breath. She was far less experienced in all this, it was entirely possible that she’d lose her composure too soon and then this moment would be ruined. As much as she wanted it to be over, Sunset Shimmer knew that she couldn’t just walk away from this dilemma.

“I’m sorry, Twilight,” she murmured, closing her eyes and keeping her voice level, “I shouldn’t have sprung this on you. We can…go back home, if you’re not comfortable with this.”

For several tense seconds, Twilight Sparkle didn’t respond. Her wings fidgeted unconsciously along with her breathing. Sunset Shimmer was almost hoping for a reproach—she knew that she had messed up, and she understood by now that mistakes required being made right. Eventually, though, the mare replied, “No, it’s fine, we don’t…have to go back…I just—” She gave a gasp that was partway toward being a moan, and Sunset Shimmer looked back to see her grasping at her hip, fingers sinking into the pliant flesh. “Is this…is this really just what things are like here?” she asked in disbelief.

“Well yeah,” Sunset Shimmer replied plainly, “puberty hits like a truck and then just keeps on going.” She smirked as she cupped one of her breasts in the palm of her hand, overflowing between and around her fingers. “I’m just above average for a mare. And you should see some of the stallions. The version of your brother in this world has a dick that nearly touches the floor.”

She twisted about to gawk at her in shock and awe. “No way, that’s absurd!”

“Oh, well if that’s absurd, I guess I shouldn’t tell you about Big Mac then.”

“Oh my God.” Twilight Sparkle rubbed her temples. Sunset Shimmer couldn’t resist chuckling. “So everyone—”

“Everypony.”

“—is just hypersexualized and…horny all the time. Are we in heat? Is it conveniently mating season now?”

“It’s called estrus, and it’s actually just a constant around here, unlike the horses you’re used to seeing.” Sunset Shimmer privately reflected on how uncomfortable it felt whenever she went to Applejack’s family ranch in the human world and observed the tamed, non-sapient horses that they held there.

Twilight Sparkle balked. “How do you even get anything done?!”

She shrugged. “Just get some rutting done and then you’ll be ready for an hour or two of work before going at it again. When I was a student under Celestia, I’d go look for nerds like you to get some action between research projects. I’d have them screaming for more by the time I was done.” She held her fingers up to her mouth and extended her tongue, making a show of lapping sensuously at her hand.

“Stop!” Twilight Sparkle reached out and shoved her shoulder, but despite her astonishment she was now smiling, however slightly.

“We’ll see how you feel when I’ve got you on your back,” Sunset Shimmer shot back with a hungry growl in her throat. It was closer than either of them might realize; she was close to losing control, teetering on the edge more and more with every passing second as her arousal intensified. Indeed, it was a whole lot easier to get thinking done after the rutting was over.

“And is that also…why we’re naked?” she asked. The confusion was gradually leaving her. That left only the haggard exhaustion of the stimulation that was surging through her system. She was holding up well, all things considered.

“Well, as you might imagine, a lot of ponies don’t bother with clothes,” Sunset Shimmer explained. “Unless they have some profession that demands it, it’s more of an accessorizing thing than anything else. I guess the portal just assumes that it would be normal for us to be naked when we come through, so it takes away whatever we’re wearing. It’s the reverse for going the other way through; the first time I used the portal, I came out on the other side with some new threads from nowhere.”

“Oh…but…then what happened to our clothes?” She sounded alarmed again as she looked toward the mirror portal.

“I don’t really know how it works, but it’s like the portal ‘remembers’ what you were wearing and gives it back to you when you go back the other way, so don’t worry about losing anything.”

Twilight Sparkle’s brow furrowed. “Why does magic always have to be so confusing?”

“Hey, once you understand it, it’s not so different from basic physics and chemistry. If we stay here long enough, maybe I can even teach you how to use that horn of yours.” She pointed to the other mare, and she looked up, nearly cross-eyed, at the spire emerging from her forehead, as if only just now noticing it.

“And…what about the wings?” she asked, glancing back over her shoulder at the feathered appendages that didn’t seem particularly keen on folding up into a resting position.

That prompted Sunset Shimmer’s mood to shift abruptly all at once. “Sorry, you’re going to have to ask a pegasus about that. And that reminds me—” She leaned in closer, growing sterner than ever. “—why are you an alicorn?”

And Twilight Sparkle just stared back at her flatly. “Sunset, do you think at this point that I have any idea about how any of this works?”

“I don’t know, you have to have some idea! You’re still Twilight Sparkle, figuring out problems is your whole shtick!”

She groaned, slapping a palm to her face and shaking her head. “I guess…I don’t know, because of some connection I have with Princess Twilight? If the portal thinks that I’m the same as her, then maybe it thinks that I’m supposed to be an alicorn.”

“Oh, fantastic,” Sunset Shimmer grumbled, “so Miss Princess is just inherently an alicorn then, huh?” She might have given up her villainous lust for power a long while ago, but she still couldn’t help feeling miffed at the idea of how much effort she had put into her studies during her time with Celestia, and now alicornhood had just been handed out for free to somepony who had done none of that work. Now this was cruel and unusual punishment if ever she had seen it.

That was in addition to the cruelty of how long she was having to wait before they could get to fucking. Fuck, she really needed that. She was doubling over, nearly crumpling to the floor, as if she had a stomach cramp.

“What…what’s even the big…d-deal about it?” Twilight Sparkle asked, wracked by a similar state of discomfort. The way she was panting nearly made it seem like she had just run a marathon. Or maybe as if they were in a sauna; the heat inside both of them nearly made it feel like that.

“Oh, not much, just…you know, unparalleled magical capacity, the strengths of all three races of pony combined, and becoming eligible to rule the country,” Sunset Shimmer replied, rolling her eyes and shaking one hand in a dismissive gesture. Although she had never known during her time as Celestia’s student that that might actually be the end point of her studies, it did make her feel bitter in retrospect to realize the opportunity that she had missed. “Oh, and alicorns are generally more endowed than other ponies and they have stronger musk.”

“Stronger…muh…what?” Twilight Sparkle looked close to collapsing and sounded like she was barely registering anything being said.

“It’s your scent, Twilight,” Sunset Shimmer said plainly, and she took in a deep breath through her nostrils for emphasis. There was a lot more than just the smell of the library now. The aroma of two ponies intermingled with each other, heady and intoxicating. She recognized her own musk, spicy, almost cinnamon-like, and it was mixed with another, fragrant and flowery, with a hint of a bitter tang that might have been ink. That single huff of air spiked into her brain, and she cried out a crooning exultation. That was probably why she was getting so worked up in spite of the numerous mood killers they’d gone through on this rollercoaster of emotions. As a pony who had once regularly been in attendance of one of Equestria’s Princesses, Sunset Shimmer had more control over herself than others; another pony in the presence of an alicorn might have given over to a climax right on the spot.

Twilight Sparkle breathed in through her nose as well, and then she moaned, lolling about increasingly listless. “What…what does it…oh God,” she murmured, maybe not specifically to the other mare in the room, maybe not to anypony at all. “How do you cope with this?”

“Here, let me show you.”

There were thumps on the floor, and Twilight Sparkle turned, only to then see Sunset Shimmer crawling toward her, moments before she threw herself upon her. They both cried, voices tinged with arousal, as they fell over each other all over again, this time with the orange mare on top. Their breasts squeezed against each other, and Sunset Shimmer’s head buzzed with all the things she wanted to do to those heavenly mounds, but for now that could wait. Instead she put everything into the final lunge to put her mouth against Twilight Sparkle’s. The bookish girl had gotten to be a decently good kisser after a few months together, but seemed she was back to square one now that she had a muzzle. Passion and instinct, however, had a way of working hand in hand with each other, so she fell into the rhythms quickly, guided by Sunset Shimmer’s lips and tongue. They breathed each other’s air, moving in tandem. Sunset Shimmer couldn’t have said before whether she or her partner was the first one to start groping at the other.

“You’d do this…every day?” Twilight Sparkle asked during a brief interlude in which they were nuzzling at each other instead of kissing.

“Multiple times every day, hon,” Sunset Shimmer replied with a hollow laugh.

They went back and forth for a while, experimenting—neither one could wholly resist the scientist in them. They groped and squeezed and mashed at each other. They rolled over each other, and Twilight Sparkle’s wings fluttered and flapped whenever they had sufficient freedom to do so. They pushed their muzzles at each other, against cheeks, into manes, into breasts, relishing in the cushy softness, and teasing each other’s sensitive nipples. At one point, when Twilight Sparkle was helping herself to a faceful of Sunset Shimmer’s bosom, she responded by sticking out her tongue and dragging it along the lavender mare’s horn. Twilight Sparkle gave out a genuine whinny in surprise, and a few magenta sparks even flashed into being.

“If you think that’s good, I’m just getting started,” Sunset Shimmer boasted with a wide smirk.

“S-Sunset, I…I-I…” she stammered back, at a loss for words.

“Don’t worry about it, Twi, you’re in good hands.” And she demonstrated that by hefting Twilight Sparkle’s mammoth mammaries, with a squeeze for good measure, and she cried out in ecstasy.

Sunset Shimmer eased the inexperienced pony backward onto the floor (far from being the most romantic or even comfortable location to be doing this, but it wasn’t uncommon for ponies to make do with whatever surroundings they had when the urge hit them). She held this position only for a few moments, relishing the knowledge that she was topping an alicorn. She kissed Twilight Sparkle on the lips one last time before beginning to move downward, peppering more smooches along her neck and chest. She equally nuzzled the hard ridges of her collarbones and the pliant girth of her breasts. Over the stomach, tickling the navel, and finally down to the prize, spreading apart her legs as if opening the covers of a good book.

An anticipatory shiver rocked through the purple mare. Her mouth hung open, her jaw trembling, unable to form words. But her eyes said more than any words could. There was the raw sexual hunger that all ponies were familiar with, undoubtedly. But there was also the spark of insatiable curiosity that was so unique to her. At the end of the day, this was just going to be yet another topic to study. She would have plenty of research material to go over.

Then with one fluid motion Sunset Shimmer plunged. Her mouth opened and her tongue lashed out like a snake (or that one alien monster in a sci-fi movie she saw once; for being so mundane, humans had awfully vivid imaginations at times), and her prey was Twilight Sparkle’s innards. She pushed in between the plump nether lips, and several reactions began all at once. Juices erupted at her tongue, a sweet nectar more delectable than any food. The reek of sex assaulting her nostrils grew more intense than ever, numbing her mind. Twilight Sparkle screamed, a primal sound of pleasure and agony, so shrill that it might have shattered glass. Her legs clamped shut, burying Sunset Shimmer’s head in thigh meat—at least it muffled the noise. None of that was going to stop this from continuing, though. Sunset Shimmer continued, dragging her tongue through the sensitive tissue of her marefriend’s labia, and the shrieking only grew louder still when she reached the clitoris, dragging and rasping along that tantalizing little nub for as long as she could.

Then she withdrew, and in that brief respite Twilight Sparkle immediately cried out the only word that she needed, yowling with ecstatic delight: “More!”

Sunset Shimmer grinned to herself in self-satisfaction.

So it continued. Twilight Sparkle wailed ever louder, her back arching up from the floor, as if convulsing from an electric shock. Her horn pulsed with emanations of magical energy, an unconscious manifestation prompted by the surge of emotion within her. Her arms clasped at her breasts, fingers probing across the ponderous globes until finding her nipples, squeezing the tender furless skin. At the same time, Sunset Shimmer, realizing that she wasn’t getting much out of this herself right now, let one of her hands dart to her own crotch, prying open the slit between her legs, and she got to work stimulating both of them at once. Her brain buzzed with activity, arousal and stimulation igniting her senses, but it was never enough to lose sight of her goal. One lick after another, deeper and deeper into the recesses of the mare as one would with a lollipop, and at the center of it there was going to be an explosive orgasm waiting for her.

No. Not quite like this. There was a better way to do this. Thinking on one’s hooves like this was a desirable trait for ponies to have, to segue from one lewd activity to the next.

Sunset Shimmer pulled away, and this time the tongue didn’t come back. As the tide of pleasure receded, Twilight Sparkle had just enough time to recognize that the routine had been halted, and that was unacceptable. But then, before she could actually voice her displeasure about this revelation, something touched her—no, not touch, it was a vague impression of touch, a ghostly tingle that caressed her back and shoulders. It lifted her upward into a sitting posture again, bringing her face to face with Sunset Shimmer who was doing the same in front of her. “Here,” she said flatly, masking the rumble of hunger under the surface, “do this.” She reached underneath one of her legs and lifted it up with remarkable dexterity, hoof pointing straight into the air.

Twilight Sparkle only stared, her eyes partially glazed over. “Wh-what—?”

Too much hesitation. She would never get anywhere like that. So Sunset Shimmer’s horn pulsed and another aura of teal light manifested around the alicorn’s own leg, and she yelped as it too was raised. She might have been able to manage that kind of flexibility as a human, but it certainly didn’t hurt that ponies were inherently more physically capable. She wobbled precariously, imbalanced, but Sunset Shimmer was there to keep her steady with the embrace of her magic. “You can’t stay on edge forever, hon,” the unicorn murmured, and she dragged Twilight Sparkle across the floor toward her. Another tender kiss on the lips. She held her still as a tremble wracked through both of them upon the meeting of their vulvae, kissing both above and below, breasts mashing together in between. Sunset Shimmer shifted to holding up the other mare’s leg, squeezing the fat and muscle of her thigh, and that prompted Twilight Sparkle to reciprocate the gesture, wrapping each other in a mutual embrace. Entwined, nestled in each other, they were nearly as one. It was time to bridge the final gap.

Now that she no longer had to use her magic for anything else, Sunset Shimmer put everything she had into one last conjuration. It started between them, in the dark space shadowed by the canopy of their bosoms, the tangle of their legs, teal light blooming into being. Not that either of them especially noticed, even Sunset Shimmer herself; she was acting entirely on feel. The ethereal construct started as a disc, and it pressed itself between their groins. Twilight Sparkle faltered momentarily, puzzled once again, but she was too engrossed to ask any questions. Then the disc extruded on both sides, turning into a cylinder, and it found its way into both of them. The kiss broke off as the alicorn gasped in shock, moaning. The spike of stimulation through Sunset Shimmer nearly broke her concentration on the spell, but she persevered, and she continued digging deeper. Using magically constructed toys wasn’t as effective as the real thing, owing to their fleeting and volatile nature if the caster wasn’t sufficiently trained, but it was still something that made unicorns highly valued in Equestrian society. She was aware of her own limits as she felt her innards strain, but she couldn’t be certain of the same for Twilight Sparkle. Ultimately, there was nothing that could be done about it other than to keep steadily probing, to see how far they could go while they kissed and squeezed and groped and ground against each other, a writhing mass of pony flesh.

“Suh…Sah…ahn…” Twilight Sparkle stammered, her eyes rolling back in their sockets.

Sunset Shimmer felt that they were both teetering on the precipice at last. It was something that any pony could be aware of when they were with a sexual partner, but it was strongest when the two (or more) were attuned to each other, when there was more between them than mere physical attraction. That bubbling was within her right now, ready to burst.

“I…I luh…lah…ah…!”

Twilight Sparkle spasmed, and after all that wailing there was only a single choked cry that came from her as she climaxed. The same rush surged through Sunset Shimmer all at once, seizing and clenching. Their embrace on each other became a death grip, each holding onto the only thing in the whole world—in all worlds—that truly mattered.

The unicorn cut off the spell when she felt the sticky juices that were trickling between their thighs, and while they sat there catching their breath, huddled together, she leaned toward the other mare’s ear and whispered, “I love you too, Twi. It doesn’t matter what you look like, you’re always going to be the same dork.”

Twilight Sparkle’s gasping breaths steadily turned into hollow chuckling. “And you’re…always going to be the same incorrigible ruffian, huh?”

“I can definitely get rough for you, if that’s what you want,” she replied lasciviously, and she stuck out her tongue while she pinched one of the purple mare’s nipples.

There was no harsh reaction this time. Instead, Twilight Sparkle returned the favor.

They both laughed as they untangled from each other, falling over the floor. The emotional high of their climax wore off, leaving them with the sore and the ache and the tingling, and it was all so wonderful, a reminder of the thrill of life. Sunset Shimmer was always eager to experience this again, every time she came through the portal, and now she could boast that she had experienced the pleasure of being with a true lover—not a stranger, not a friend, not a fuckbuddy, just someone she genuinely loved from the bottom of her heart. She could only desperately hope that Twilight Sparkle felt the same way.

“What would you like to do now?” the orange mare asked while still staring up at the ceiling. “I could try showing you some magic. Or you could take a peek at the books here.” She absentmindedly swept a hand around toward the walls. “Princess Twilight has one of the foremost collections of literature related to magical knowledge in all of—”

“Fuck that.” Her wrist was seized. Twilight Sparkle was crawling toward her on her knees. A grin was stretched across her muzzle. Her glasses were askew and there were hairs hanging loose from her mane. “Let’s go at it again.”

Sunset Shimmer grinned back at her. “Now you’re thinking like a pony.”

It was going to be a long, loud, delightful night.

Author's Note

I think I had different ideas for the tone of this story as I was going into it, but as it went along I fell into the drama aspects of the situation.

This is one of the most vanilla things I've written in a long time.

I forgot about Spike, oops.

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