Like Gravity

For what felt like hours, Rainbow Dash and Lightning Dust remained locked in what the former could only think of as some kind of limbo, both more or less willing to proceed but neither quite knowing how.  Lightning’s breaths came in short, heavy bursts, each puff of air against Rainbow’s exposed neck forming an irregular rhythm with the skyrocketing pulse she could feel pounding out of the other mare’s chest.  Scalding hot water poured off the pair in sheets, most of it gravitating towards Lightning since she was more directly underneath the stream.  Beneath a blurry red and yellow fringe obscuring the top half of her vision, Rainbow could see her friend’s fiery orange mane wrapped in soaking wet clumps around her shoulders and neck, the little tuft that usually stuck out from her forehead now plastered against it.  Once she noticed that Lightning’s eyes were still glazed over and pointed at her partner’s collarbone, she let her own eyes drift downwards.

True to form, not an inch of Lightning Dust’s frame showed any sign of physical frailty.  Through the soggy veil of belly fur that covered them, Dash could feel Lightning’s powerful abdominals flex in and out with every breath the opal-coated mare took.  The muscles along her chest and sides were visibly toned too, probably thanks to the immense wingspan she had on display behind her.  Lightning probably had a good four feet between the tips at least, a good indicator of exceptional wingpower and, if the urban legend was true, sexual prowess.

Her lower half continued the same trend: though the two of them were pressed too close together for Rainbow to see any of Lightning’s middle past her sternum, a quick glance around the foreleg Lightning had propped against Rainbow’s shoulders revealed a tight, perky little flank, not at all bony but still smaller than normal.  Rainbow swallowed hard, and took a deep breath of her own.  She didn’t want to call the jury in on what had brought out the butterflies flapping around in her stomach, but staring at the rivulets of water rolling past Lighting’s naked cutie mark and snaking down the backs of her thighs was certainly riling them up.

Another few moments passed, and Lightning still didn’t make a move.  In equal parts ready to get things started already and to get a bit of control back on her side of the situation, Rainbow lifted her forelegs off the wall and slipped them past the underside of Lightning’s, sliding up the wall and reaching around the mare’s back until her hooves met again at the ridge of her spine.  Lightning jerked as if she’d been pinched, and her breath hitched in her throat before rushing out right into Dash’s parted lips.  Rainbow was slightly taller than Lightning now, and found herself relishing the fact a lot more than she might have expected.

“So...” the wing pony led off.  “What now?”

The question was hardly even necessary.  Rainbow felt Lightning’s reaction coming in every muscle that tightened all across her body, in every droplet of water that sprayed from her wings as they gave an involuntary shudder amid the water showering them both.  She closed her eyes just soon enough to miss Lightning’s snout darting up under her chin, clumsily bumping against her cheek and nose before her lips finally found the matching pair they’d been searching for.  Rainbow’s hooves were forced back against the wall as Lightning’s forelegs shot up to cradle the other mare’s face, and as a whimpering moan echoed from Lightning’s mouth into Rainbow’s, she felt within her chest a deep, inescapable, all-encompassing sensation of... of...

Well, nothing, honestly.  Lightning was kissing her and she was doing her best to return the favor, but something about it just wasn’t right.  It wasn’t the feeling of it, she supposed.  The pressure of Lightning’s lips against hers was the same she remembered from the times she’d done this before.  It was the little things, the factors she never could’ve described another time but seemed blatantly absent in the moment.  She’d kissed a few stallions before, and each time their lips had been soft, their touch warm and delightfully smooth even after things started to heat up.

Lightning, on the other hoof, was going after her like a starving mare after a feast, enveloping her entire mouth with lips as rigid as stone.  At the start, Rainbow had just assumed it was how Lightning did things: hard, fast, and with alluring strength and passion.  Once she reached a full minute without shifting her form or even her stance against the wall, though, her actions didn’t seem powerful so much as just desperate.  It occurred to Rainbow once again that in this position, she was still slightly taller than Lightning, and with it this time came another thought: when the other girls had been talking about the other stallions they’d kissed, the only one who hadn’t said anything at all was Lightning Dust.

With her mouth blocked off as it was, Rainbow Dash chose to communicate with her body instead.  After flexing her back and rolling off the wall, she kept herself upright by bracing her hooves under Lightning’s forelegs again.  Lightning twitched and gasped at the feeling, then broke away, out of breath already from her frantic efforts.  Her balance regained, Rainbow cupped a forehoof under Lightning’s chin and slowly pulled her back in.  When their lips met this time, Lightning was a lot less stiff, and a lot more putty-like in Rainbow’s slightly more knowledgeable hooves.  The kiss lasted longer this time, given extra flavor by the water that inevitably filled both their hooves and broken only when they surfaced to get rid of it.

And yet, it still wasn’t quite what she’d hoped.  The butterflies were settling down again, and through the gradual hesitancy she began to taste in Lightning’s impressionable lips, Rainbow could tell she wasn’t alone facing that problem.  This wasn’t enough.  Something needed to be different.  Something—

When she looked back on this all later, Rainbow admitted to herself that what happened next shouldn’t have come as a surprise.  It wasn’t like Lightning would’ve put on that whole pageant for her if all she’d wanted was a quick peck on the lips.  Her own motions should’ve given it away too: the way she was slowly shifting to the side, the way she’d shuffled her hind legs to make sure she’d be able to stay standing like this, the way her hooves had trailed down Rainbow’s shoulders to her arms, her sides, her flank.  All of this should’ve let her know exactly what one track Lightning’s mind was on, but even still, when the gentle pressure on the backs of her thighs suddenly became a paralyzing pressure in the crevice between them, it was all she could do not to cry out in shock.  Or anger.  Or maybe, if the swarm of fluttering wings taking off in that same area were anything to go by, something else entirely.

For a few long, stomach-churning moments, Rainbow’s mind was blank.  Not even hijacked by what Lightning was doing to her, just completely empty of all thoughts and memories.  She couldn’t have moved if she wanted to, and if you had to go by body language, you’d be pretty sure she didn’t want to at all.  By the time her awareness of the situation came rushing back to her, she had sank down the wall a bit, and Lightning wore a cockeyed smirk that she’d put on every time Rainbow had seen her blow her competition away out on the training circuit.  It was... cute.  That was the word that had escaped her for days.  Lightning Dust looked impossibly cute when she put on that look.  And cocky.  And awesome.  And maybe, when she was soaking wet and standing over her with her hoof pushing into her vagina, just a little bit hot.

“Yeah...” Lightning hissed into Rainbow’s ear, drawing forth a shudder that started at the base of Rainbow’s tail and traveled way further than the words of any colt ever had before.  “Thought you might like that.”

“Uh...” Rainbow practically drooled.  What was she supposed to say to that?  Wasn’t she supposed to be in control right now?  Wasn’t her body supposed to agree with what her mind was telling it to do?

“Maybe you’ll like this too, then,” Lightning added, her teeth scraping against the tip of Rainbow’s ear just before her lips closed around it.  That would’ve been enough for another chill down Rainbow’s spine on its own, but Lightning wasn’t just seducing her; she was multitasking.  Her hoof was moving now, slowly rubbing back and forth along the slit between her legs and parting the lips surrounding it a little more each time.

        “I thought it’d be hard getting you in here,” Lightning sighed.  Her mouth moved away from her ear, eliciting an almost plaintive whine from Rainbow that cut out the instant Lightning’s lips touched down at the base of her neck.  “I had no idea you’d be this easy.”

        “Ha-ah...”

        Lightning’s elbow jabbed into Rainbow’s stomach, but once again Rainbow was more preoccupied with the other mare’s hoof, which was now almost vertical and brushing against the little button at the front of her marehood that’d been buzzing with energy ever since they’d gotten in here.  Her motions were faster now, aided by a liquid embellishment too slick and deliciously warm to be the water washing over them, and matched by Rainbow with gentle, unconscious thrusts of her waist.

        “I told you,” Lightning gasped.  Rainbow hadn’t so much as pointed a sultry look her way in the last minute, but Lightning seemed to be getting off just by being close to her.  “I told you you’d... you don’t how long I’ve...”

        Lightning surged forward, her hoof slipping almost all the way back to Rainbow’s tailhole, and both mares gasped.  Their lips were inches apart again, but more kissing was the last thing on Rainbow’s mind right now.  She needed to pull herself together.  She needed to regain control.  So in the brief extra second Lightning needed to recover, Rainbow pressed her advantage.  She leaned up, sank her teeth into Lightning’s shoulder, and wormed one strong forehoof into the small of the other mare’s back.  The other forehoof went straight to Lightning’s cunt.

        That one moment stretched into several as Lightning’s jaw dropped open and a rattling sigh punched out of it, giving Rainbow a chance to think over the path her thoughts had just taken.  It was a cunt now, wasn’t it?  Marehood was a misnomer, a polite imposter standing in for an impolite subject.  Even vagina seemed too formal, too scientific.  They weren’t dealing with formality and politeness anymore.  This was all physical, all mutually beneficent carnal pleasure.  In a way, the vulgar term was the last thing she needed to legitimize it.

        Cunt.  Pussy.  Cooter.  Twat.  She would’ve blushed at the words any other time, but now they were exciting.  Now they were powerful.  And right now, that power was curling into a tight little ball below her stomach, just begging to be set free.

        “Thought you might like that too,” she hissed, and it took no time at all to know she was right.  She hadn’t even started rubbing yet, and Lightning was already dripping wet.  The hoof Lightning still held in Rainbow’s groin—in her snatch—was operating free of its owner’s control now, sawing back and forth like she intended to cut Rainbow Dash in half.  When Rainbow finally began returning the favor, the speed only increased.

        “I knew... it would work...” Lightning heaved, each burst of a phrase fueled by desperate gulps for air that increased in pitch every second.  “Knew you cou... couldn’t resi...”

        Rainbow reached far back enough to stretch Lightning’s entrance with the edge of her hoof, and whatever taunt she’d been dying to let loose shattered in the face of a moan loud enough to wake the dead.  Not that Rainbow Dash cared anymore.  The whole academy could come and watch now, for all she cared anymore.

        “Knew you’d be... begging for this before long,” Rainbow growled, her teeth still clenched under Lightning’s chin.  “Li... little slut.”

        “I’m a slut?” Lightning asked.  She was grinning again.  Her motions had changed from back and forth to up and down, forcing Rainbow’s pussy lips apart again and sending waves of pleasure through her that made her flanks tingle and her head spin.  “Look who’s ta... talking.  I bet you won’t even last another minute.”

        Lightning’s jibe spurred Rainbow’s mind—and her hoof—back into action.  She thrust her hoof even deeper inside her partner’s cunt, and felt her inner walls tighten in anticipation.  “Is that a challenge?”

        Lightning threw her mane back with a jerk of her head and laughed, though the noise that came out of her mouth sounded more like a sigh.  “It’s a fact.”

Another spasm rolled through Rainbow’s body as Lightning’s hoof slid past her clitoris again, but by sheer force of will she kept her composure.  “We’ll see about...” she started to murmur, but in the end the effort required to form a coherent sentence proved too much to handle.  If the words had come, she would have too.

The battle for dominance between the two mares raged on for almost a full minute, silent but for the occasional grunt of exertion or stifled cry of pleasure.  Lightning went on the offensive right from the start; Rainbow barely had time to recover from her first close call before the feeling of Lightning’s tongue lapping at the water beaded on her neck nearly sent her over the edge again.  She flailed out with her free hoof hoping that dumb luck would give her something to desperately grab on to, but luckily for her, the closest thing to it was Lightning’s tensed, muscular flank.  A few experimental kneads earned her a release from the torment of Lightning’s skillful mouth, as well as a groan that Lightning bit back with an audible clack of her teeth.  Everypony had a weak spot in situations like this, and it seemed Rainbow had finally figured out where Lightning’s was.

That fortunate discovery, however, only leveled the playing field again.  Rainbow had successfully steeled herself against anything her lead pony could throw at her, but if anything, Lightning was even more determined than her not to give any ground.  Massaging her clit and smearing her fluids all over her thighs made Rainbow’s legs quiver more than it did hers, and the way her chest rose and fell in time with her own strokes in Rainbow’s pussy hinted at the same thing happening in reverse to her.  An unstoppable force had met an immovable object in the Wonderbolts Academy locker room, and if something didn’t turn the tide soon, they’d stay locked together like this all night.  All night long...

Rainbow Dash shut her eyes tight and forced the thought out of her mind.  Focus.  She needed to focus.  She needed to end this, to sate the two ravenous beasts of lust and desire for physical superiority intertwined in her gut.  She wanted to win.  She wanted to come.  Oh, Celestia, she wanted to feel Lightning come first.

But that wouldn’t happen if they just kept grinding against each other till one of them collapsed from sheer exhaustion.  There had to be another weak spot, another part of the nubile mare’s body where just the right touch would make her melt into the milky puddle they were already forming around the shower drain.  What else would make a mare like Lightning Dust roll her eyes back into her head and scream for more?  She was feisty, passionate, at least a little bit kinky—why else would she have wanted to do this in the shower?  And her ass... she just about went crazy when Rainbow grabbed her ass.

Lightning’s tongue was back at Rainbow’s collarbone again, and slowly but steadily trailing up towards her ear.  She didn’t have much time to consider the plan that sprang into her mind, so she just went with it.  As Lightning kissed her way past Rainbow’s cheek and as her pussy preemptively convulsed with pent-up energy, she squeezed at her flank with one hoof and frantically worked at her clit with the other, using the double-edged assault to keep her from noticing the latter hoof creeping closer and closer to her tailhole.

With a throaty moan, Lightning slid Rainbow’s entire ear between her lips, her tongue washing all around its edge before poking inside.  Rainbow’s hips bucked, and her whole lower half shrank inside.  It was now or never.  Teetering at the height of gratification, Rainbow thrust her hoof into and over Lightning’s pussy, coated the tender pucker behind it in her juices, then pulled her asscheeks apart and pushed into it.  Hard.

She’d been expecting a squeal of delight to punch its way out of Lightning’s throat, but what she ended up getting was even better: Lightning’s lips slid off Rainbow’s ear with a distinct pop as she coughed out a breathless wheeze punctuated by an uncharacteristically tiny squeak.  Rainbow’s hoof was trapped between Lightning’s thighs as she ground her pulsing cunt against it, and before now her entire foreleg was drenched in the slick, warm come spurting out of her and splashing onto their hind hooves below.  The sight of all that happening right on top of her, coupled with the weight of Lightning’s limp torso sagging into her, formed a weight in her groin too heavy to shake off, and the little drop of drool that fell from Lightning’s bottom lip onto her nose was the last straw.

The bliss that rocketed through her body in heavenly waves was indescribable, almost incomprehensible; for a few moments, her benumbed brain was sure something had gone wrong.  It couldn’t be right that it hit her this hard, that its intoxicating pull over every inch of her body was this inescapably intense.  Her mind was gone, encompassed by pleasure and a burning desire to stay that way forever, and her pussy seemed to have a mind of its own now, flexing and shuddering around Lightning’s strong, sexy, soaked forehoof.

Gradually, the scorching heat in her groin receded into her stomach again, where it subsided to a gentle, flickering glow that sent tongues of delicious warmth licking down her legs and up through her heart to the tips of her ears.  Whether due to extra muscle or just the awkward position they were in, Lightning was a lot heavier than she looked, and Rainbow had to maneuver her hoof out from the mare’s folds and around her back with its twin just to keep them both upright.  Lightning’s eyes fluttered open at the contact and, as Rainbow let the water of the shower rinse the byproducts of her encounter down the drain, lifted up to meet those of her partner.  She raised her hooves and hung them around Rainbow’s neck again, then gently tugged her head down towards hers, a silent question that Rainbow was all too happy to answer.

Their last attempt at kissing had been strained and hopelessly incompetent; this one made up for it completely, and then some.  Lightning was less nervous and Rainbow was a lot more comfortable with the idea now, and the result was a chaotic, exhilarating mess of soft touches and new sensations.  Still wading in the dregs of her afterglow, Rainbow let Lightning steer for a bit, a role which Lightning took a liking to quickly.  Her tongue poked at Rainbow’s lips, and after a few moments slid through them and across her teeth.  Without missing a beat, Rainbow closed her lips around it and ushered it further inside her mouth, mashing her own tongue against it and savoring the distantly spicy taste of the other mare’s limber, talented organ.

Fog continued to build up on the locker room mirror, barely visible through a crack in the curtain, as the two mares caressed each other in a waterlogged embrace, their hooves brushing over every inch of skin within reach as their tongues explored the deepest depths of their mouths.  The pressure in Rainbow’s belly was growing again, bringing with it a feverish desire for Lightning’s touch to dive south of the border again, and a spine-tingling urge to do something—anything—to get her pointed in the right direction.  Like it had before, her mind made the jump from idea to action in a flash: in one forceful move, she tightened her grip on Lightning’s sides and flipped her around so that she was the one being pressed into the wall, her wings splayed behind her and her lips limp under the suddenly commanding ministrations of Rainbow’s tongue.

Lightning didn’t seem to mind being the center of attention.  A deep, contented groan shook her entire frame, and her forelegs relaxed as they began to slide down Rainbow’s back.  Just before she could cup her hooves around Rainbow’s ass, though, she shifted and slipped from her grasp, her lips finally separating from Lightning’s in the same motion.  To her credit, Lightning didn’t complain, though the fact that Rainbow immediately moved down to kiss and nibble at her shoulder certainly helped ease the sense of loss.  When Rainbow crouched down farther and her kisses gravitated towards the center of her chest, though, her hooves tightened around Rainbow’s shoulders, and her gentle sighs of pleasure hitched in her throat.

Keeping her hooves at Lightning’s hips and her wings spread for balance, Rainbow slid her lips down even further, past the tiny crevice at the bottom of her rib cage and onto the tight abdominals that only got harder the more attention Rainbow lavished on them.  Lightning’s sighs had returned, though they were far from gentle now and steadily increasing in pitch and volume.  She moved down another few inches, and stole a glance up as her flank touched down on the shower floor.  Lightning’s chin was tilted down towards Rainbow and hanging open, and if her eyes got any bigger there wouldn’t be room left in the shower for the rest of her head.

It had dawned on her what was happening.  She knew what was coming.  And now it was time for Rainbow to deliver.  On the other hoof, though, she’d probably never get another opportunity like this as long as she lived.  So instead of trailing down another six inches and placing the lightest of kisses right on Lightning’s clit, she let her tongue slide right to the very edge of her slit, then, in spite of Lightning’s despondent grunt, sat back on her haunches and relished the profane view.

The sight of a vagina was hardly foreign territory for Rainbow, but she’d never seen one owned by a mare so overwhelmingly aroused.  For a moment, bawdy curiosity overtook her sex drive: Lightning stood with her legs brazenly spread, her thighs coated with tiny flecks of water, her pussy lips swollen and glistening wet.  Her eyes were shut now, her bottom lip clamped between her teeth, and the instant Rainbow reached out with a forehoof and grazed the edge of her cutie mark, her flank twitched and shuddered, and she could’ve sworn her pussy winked in anticipation.

Stars above, she was about ready to beg for another round.  And even through the warmth of the shower spray rolling down her back and pooling between her legs, Rainbow could feel a very different kind of warmth spreading beneath her tail.  Who was she to leave either of them unsatisfied?  After all, she’d never leave a friend hanging.  Rainbow threaded her hooves around Lightning’s waist and braced them behind her thighs.  Lightning straightened up ever so slightly, and in the midst of that instinctive reaction, Rainbow made her move.

Her first lick was gentle, starting on the inside of Lightning’s thigh and ending as a fleeting skim over the length of her slit.  The way Lightning reacted, though, probably gave any eavesdroppers a bit more scandalous of a mental image than that.  The sound of her forehooves smacking into the shower tile echoed out of the stall like a whip crack, and the punchy moan that followed made her whole body vibrate with energy, especially the lovely little flower her wing pony now had her lips wrapped around.  Rainbow couldn’t help but smirk.  Despite her hesitancy before, she wasn’t a complete prude.  She’d rubbed one out once or twice in her teenage years, and remembered well how tender she’d been after it was over.  What she was doing must be torture for Lightning.  And somehow, that just made it all the better.

She put a little more force into her next pass, spreading Lightning’s lips further apart and pushing her tongue as far up into her snatch as she could.  Lightning was probably moaning again, but by then all Rainbow’s ears was picking up was white noise, and all her brain was sending out was static snow.  The inside of Lightning’s love tunnel was blisteringly hot, and clenched so tightly around Rainbow’s tongue that she wondered whether she’d be able to pull it back out.  The pressure would let up for fractions of seconds, only to return in force before Rainbow could so much as take a breath.  Lightning wanted more.  She wanted her deeper inside her.  Rainbow’s hooves had started working at her ass on pure instinct, to help her both surface for air once in a while and keep going once her lungs were full again.

Lightning was balanced on the very edges of her hooves now, her forehooves pushing on the back of Rainbow’s head as she continued slurping at her cunt.  The biggest surprise for the latter of the two was the taste; she’d read all sorts of stories about the flowery, ravishing flavor of a heated mare’s “nectar”, but the real thing was thin, tangy, and a bit sour—but not at all unpleasant.  Oddly enough, that was the one thing the barleyquin writers had gotten right: whatever the taste was, it had blasted its way through the lining of her heart and set the whole thing ablaze.  Any thoughts of her own satisfaction had been wiped away.  For now, right now, when Lightning was running her hooves through her mane and her mouth was singing with the sharp smack of her arousal, this was enough.  This was all she could possibly want.

In a matter of minutes, Rainbow was practically gorging herself, her nose bumping into Lightning’s clit now as her tongue desecrated every inch of her sacred place it could reach.  There were no sly quips from Lightning, no snappy comebacks from Rainbow now.  Everything about it—Rainbow’s hooves yanking on Lightning’s ass, Lightning’s hooves locked at the base of Rainbow’s skull, the steam so thick they could barely see each other anymore—just sent more goosebumps rolling over their legs, more ecstatic shivers jolting down their backs, more messages into their brains that only read, “Don’t stop, don’t stop, oh stars above, don’t stop.”  Even after Lightning finally lost her battle with gravity and slid ungracefully down to the floor, Rainbow didn’t pause for a second.  She just pushed Lightning’s legs farther apart and dove down to her now exposed tailhole, still too tight to allow her tongue entrance but plenty sensitive enough to make Lightning whimper and squirm.

Rainbow thought nothing of the tugs she felt behind her neck at first—Lightning had been pulling her face closer to her muff the whole time.  The more insistent they became, though, the harder they were to ignore, and finally Rainbow Dash pulled her head up for good and crawled over Lightning to where her hooves were directing her.  She closed her eyes just before their lips met again, and lowered herself into Lightning’s lap as their tongues swirled over and around each other again, swapping saliva and the fading aftertaste of Lightning’s pussy.  Just as she was starting to get into it, though, Lightning rolled off the wall and shoved Rainbow onto her back, threading their forelegs together as she licked at the roof of her mouth and water spattered off of them in a fine, blinding mist.

Rainbow tried to look up once she felt the weight of Lightning’s torso lift off of her, but the spray of the shower forced them shut before she could tell what Lightning was doing.  Her hoof was halfway up to her face when the shower let up all of a sudden, as if Lightning had flown up and kicked the water off.  But when she wiped her eyes clear and looked up, she didn’t see an empty white cloud drained of all moisture.  Instead, she saw a pair of drop dead opal-blue legs straddling her head, and a hot pink slit hovering between them that, if she wasn’t mistaken, was descending straight towards her open mouth.

She craned her neck and met Lightning’s ass halfway, pulling it the rest of the way down with her forehooves as Lightning’s head dipped between her thighs.  It was a lucky thing Rainbow’s tongue was already halfway inside her when her lips closed over her marehood, because if that had happened any earlier she would’ve forgotten what she was even supposed to be doing with it.  No wonder Lightning had screamed herself hoarse before: a hoof was one thing, but Lightning’s warm, supple, flexible tongue rasping over her pussy lips, digging inside and stretching her cunt as wide as a stallion’s cock would, felt better than she ever could’ve imagined.  Making Lightning feel the same way evolved from a intrinsic urge to an all-consuming purpose, and Rainbow tugged down harder, her muzzle buried between Lightning’s flanks and her tongue thrashing around inside her.

        Time lost all meaning, seconds fading into instantaneous minutes as the two horny pegasi ate each other out.  This time around, it was Lightning trying desperately to catch up with Rainbow, whose sloppy licks and kisses smeared Lightning’s juices all over her nose and chin, and would’ve had Lightning herself on her knees begging for more had she not been busy doing the very same thing in reverse.  Every part of Rainbow’s body ached—she hadn’t even known her lips could get sore—and an electric tingle ran through her every time Lightning wiggled her tongue over her clit, and every time her own tongue jerked up to rim around the tight, spasming pucker that made Lightning’s knees go weak every time Rainbow came near it.

Soon enough, all of Rainbow’s attention was focused on Lightning’s tailhole, her wings spread for balance as Lightning detached herself from Rainbow’s pussy and slumped forward on her chest with her ass stuck in the air.  Her back door was way too tight for Rainbow’s tongue to reach more than a few millimeters inside, but what an awesome surprise it was to find that she didn’t care.  She’d never thought about whether she was an ass mare, and she wasn’t about to start now.  All she knew was that her rimjob was turning Lightning into a drooling mess on the floor, and that it was making her whole lower half throb like it was about to explode.

        It wasn’t hard to tell when Lightning was ready to burst either.  Her mouth, lying sideways on the floor where her head had dropped, popped open with another tiny squeak just like before, then she threw her forehooves over Rainbow’s hind legs and shoved her torso violently back towards her partner’s face.  Rainbow’s world went dark as Lightning’s ass blocked off her eyes, her pussy grinding back and forth so fast over Rainbow’s tongue that she could hardly do anything but lie back and wait for her to finish.  She did her best to contribute anyway, pushing back at whatever she could reach while Lightning’s yelps and moans reverberated in her ears.  And just when Rainbow was sure Lightning couldn’t possibly last another second, her head dipped down again and her amazing lips formed a perfect seal around her clit, suckling on it like a hungry foal at a milk bottle.

        She did last another second.  She lasted seven more seconds before her climax ripped through her body, scattering her limbs across the shower floor and deadening her wings like flimsy wire struck by lightning.  As if the deluge of juices soaking her face and washing over her tongue wasn’t enough to send Rainbow screeching past the point of no return, Lightning’s euphoric moan vibrated straight through Rainbow’s cunt and all the way into her spine.  A single last lick over her clit was all it took to finish her off.  Rainbow Dash shuddered, screamed, and came as well.

        Her second orgasm was twice as powerful as the first, and when each and every paralyzing torrent of ecstasy had drained from her body, they brought with them a sense of deep, almost overpowering fatigue.  She hadn’t felt this exhausted in years, not even from the conditioning workouts during her first week of flight camp as a little filly.  This was a different kind of exhaustion, one buried deep within the marrow of her bones and accompanied by soft beads of warmth that trickled through her veins and collected in a snuggly little pit right in the center of her belly.  Her eyes fluttered closed under the shower’s spray, and the world faded away again as she dozed off, her head leaned against Lightning’s leg just as Lightning’s head was propped up on her stomach.

        An vague awareness of something lost brought her back from near-slumber, and her eyes opened to an empty shower.  At some point while she was out, Lightning had left, taking her things on the sink counter, leaving behind only the faintest whiff of musky arousal and berry-scented shampoo.  The shower had receded to a narrow dribble, which Rainbow worked up the initiative to kick off after a few more minutes on the ground, her flanks twinging and tingling with the effort.  Without that dull ache deep inside her marehood, she might’ve believed she’d dreamed the whole encounter.  Even with it, she was too dazed and worn out to be entirely sure anyway.

        She sloshed her way out of the shower and towards the sink, grabbing her towel along the way and using it to wipe as much as the mirror clear as she could.  Her coat was matted and tender all over, and her mane was a wreck, strands of hairs sticking out every which way and tangled together in a technicolor clump.  Thankfully, it was short enough to be presentable from a few yanks with a brush, and once she felt confident she wouldn’t wake up with her whole head tied in a knot, Rainbow Dash gathered her things and pushed the door open, the chill of the night air seeming to cut right through her overheated body.

        In the morning, this would all be put out of mind.  By the time they were up for exercises, Rainbow would know how she felt about the whole thing, and Lightning would know better than to ever bring it up in public.  And yet, despite assuring herself that she just had to keep walking and let her mind sort itself out, her jumbled thoughts never coalesced into anything solid.  When she nosed her way into her squad’s bunk room and crept past her slumbering squadmates, she had nothing.  Even once she dropped her towel and toiletries in a heap at the foot of her bed and unceremoniously threw herself onto it, she had nothing.

It was only when she rolled onto her side and her eyes settled on the hazy dark mound on Lightning’s bunk that she remembered the decision she’d made, and immediately she knew that she would never tell Lightning about it, or anypony else for that matter.  Not because she wouldn’t like it or because she couldn’t handle knowing the truth, but because it wouldn’t matter if she did.  Lightning was a friend—after tonight, her closest and most distant one all at the same time—and she knew without a doubt that she was awake over there still, thinking many of the same thoughts going through Rainbow’s head now.  If that’s the case, Rainbow thought, so be it.  Let her make her own decisions.  Let me make mine.

        And so she did.  And somehow, that power felt more satisfying than anything she’d just felt in the shower.  Rainbow Dash nodded off again in minutes, and slept better that that than she had in years.