A Messy Moon

by Tsunogami

Rating: mature
Tags: Princess Celestia, Slice of Life, Princess Luna, My Little Pony: Friendship is Magic, Romance, Sex
Length: 4296

Luna likes her fetishes, and Celestia finds ways to enjoy them as well.

The things the two royal sisters get up to during the night are far from what most ponies would expect. And to an extent, the more certain fetishes are involved, the better!

Includes: horn play, a bit of latex, and slight scat. (Oh yah, and hot lesbian incest of course.)

Enjoy!

Published 2017-08-20 21:20:27 UTC
Last updated 2017-08-20 21:20:27 UTC

(Im)proper activities among sisters.

Author's Note

Wrote this literally years ago, and thought it was shitty. Haha. Anyway, finally brought it out, dusted it off, and repaired lots of problems. This story predates any of my diaper stories in both pony world time and in real life.

(Im)proper activities among sisters.

Luna was a treasure beyond any price or trade, as valuable as the air she breathed or Celestia’s own sun. Such thoughts were never far from Celestia’s mind when she was with her beloved little sister. No matter how much time she spent with Luna she felt she would never be able to fully forget or recover from the enormous span of time she had been forced to live without her. Mostly out of love but perhaps also from some well concealed guilt Celestia had made a commitment to herself ever since Twilight and her friends had, with no small effort, returned Luna to her safely that she was going to spend as much time with her precious sister as anypony could ever hope to do.

For the moment at least Celestia felt that she was doing a rather good job of maintaining her personal commitment as she lay on her large circular bed in the middle of the sister’s large bedchamber near the top of the tallest tower of Canterlot Castle.

365,242 days, that's how long her spell had imprisoned the evil force that had consumed and become Luna on the moon and the only things that had kept Celestia sane in all that long age of waiting and longing was that the business of maintaining and improving her country was much more than a full time job and that it left little opportunity for distractions and that at all times she kept in the back of her mind the knowledge that Luna’s banishment for all its great length was hardly forever and that one day she would get her back no matter what.

Upon feeling her eyes growing wet Celestia mentally shook herself free of her revive and rolled her eyes in silent admonishment for dwelling on such unnecessary sadness for too long. It was foalish, she thought, to get so worked up when the single greatest object of her adoration currently lay nestled so close to her. Nestled she most certainly was, for at the moment Celestia had her body wrapped around that of her sister with Luna’s back pressed firmly into the soft fur of Celestia’s chest. Furthermore she had her nose buried in Luna’s starry mane, which twinkled silently in the dim room. Ever since her return Celestia hardly went through a single day where she did not at least spend a few hours alone with her sister and only during the middle of the night when Celestia was asleep and Luna held court did she go awhile without having any idea what Luna may or may not be up to.

Initially Celestia had been privately concerned that her dedication to being in proximity with Luna might bother her and Celestia was willing to take a step back and give Luna more space but as the months after Luna’s return passed by and their relationship regained its former strength Celesta found to her relief that Luna seemed to enjoy their closeness as much if not more that Celestia herself.

With Luna currently tightly wrapped around her Celestia once again couldn’t resist the opportunity to again enjoy the beautiful sister that she was blessed with. Celestia ran her eyes first over Luna’s strong back legs and thighs thinking wistfully how much fun it was to watch Luna run around the castle gardens when she was feeling playful. Then of course she came to her sister’s wonderful full backside and unique cutie mark, which was at the moment partially concealed under a pair of tight shiny black latex panties which had pleased Luna to no end when Celestia had given them to her on her birthday a few years prior remarking that they made her look like she had a bit of the night sky tightly cradling her flank. They were now one of Luna’s favorite possessions and she had developed a habit of openly wearing them around the castle much to the scandalization of the old aristocracy whenever they came to petition the court. Celestia quietly giggled at the memories of thoes escapades. Luna had a mirthful sense of humor at times and the more stuck up a pony was the more she was liable to mess with them.

Next of course was Luna’s midsection with her strong stomach muscles and soft dark blue fur which glistened softly in the waning evening light coming in through the windows. Luna’s chest quietly rose and fell in time with her barely perceptible breathing. Celestia then took in Luna’s beautiful flowing mane magically twinkling in the semi-darkness of their bedchamber. Celestia had to move her head back a few inches to take in her sister’s face and seeing as how their bodies were pressed up so close together her head was about the only part of her body she could move without disturbing her sleeping sister. Celesta sighed in contentment while gazing at that angelic face, the face she could never bear to loose again. Once more removing herself from further dreamy contemplation Celestia fixed her gaze on what was probably her favorite part of Luna’s body aside from the beauty currently concealed under Luna’s favorite panties.

Her Sister’s sublime horn glistened in the twilight of evening. Up close it looked like it had been expertly formed from opaque dark blue glass, that remarkably sensitive outer coating was smooth as ice yet hard as diamond.

Throughout unicorn history and especially among the ancient unicorn kingdoms the horn was revered as a sacred object to be carefully cared for and treated with respect above all other body parts. This near religious reverence to the ideal of the unicorn horn as a pure object made it all the more fun then, so Celestia thought, to use it in ways that would have horrified those magical priests of old. After all what good was it being an alicorn, a state of being that came with an especially long and powerful horn if you couldn’t use it as an instrument to better enjoy yourself and those you loved?

Celestia’s heart rate increased just slightly while gazing at the base of the glorious deep blue shaft thrusting out from Luna’s mane and coming to rest against Celestia’s forehead. The places that horn had been only just a few hours ago now brought a subtle but deeply felt grin to Celestia’s face.

Having felt at the time that she and her own horn had fully repaid the favor Luna had granted her now she wasn’t so sure. Already holding her sleeping sister close she gently pulled her into an even tighter embrace and rubbed her own pearly white horn along the length of her Luna’s. The unique sensitivity present in all unicorn horns brought a soft sigh to Celestia’s lips and the pleasure of contact went straight down the shaft and into her brain.

Despite a certain reluctance to chance waking her sister Celestia decided that such an eventuality was unavoidable due to Luna’s duty to set the moon on its nightly path across the sky, a task who’s time would soon arrive. Therefor with little concern for the immediate consequences the Princess of the Sun moved her head forward and gently but firmly began kissing her sister full on the mouth. As Luna had been quite thoroughly asleep she didn’t respond immediately but Celestia persisted buy repeatedly running her tongue across Luna’s teeth. This new pleasant sensation inexorably pulled Luna up out of her slumber. Being used to this sort of behavior from her sister Luna was quick to realize what was going on and take advantage of her older sibling’s growing passion.

Although not bothering to open her eyes Luna did bother to open her mouth, inviting her sister’s impatient tongue to wrap itself around her own and in so doing confirmed Celestia’s suspicions of Luna’s awakened state. Their tongue wrestling continued for long enough that Luna was quite thoroughly awake by the time Celestia finally pulled away. Even though the evening was upon them and therefore so was Luna’s most active time of the day Celestia hoped that she would be able to repay Luna for the pleasure her sister had brought her that morning. She didn’t have a whole lot of time before Luna’s duties would force them to get out of bed, so with determination she slid her head back along the soft mattress of her bed as far as she could stretch until the tip of Luna’s horn pressed against her lips. She then opened her mouth wide and plunged her head and neck forward. This quick motion sent the wonderful smoothness of her sister’s horn slipping over her tongue and forced it to continue its swift slide down her throat.

It was now then, that Luna’s eyes opened up.

“Uhhhh...” Luna breathed as the tight muscles of her sister’s throat surrounded her horn.

Understanding that lying on her side was an impractical position in which to properly please her sister Celestia rotated her own body along with Luna’s so that Luna was now lying on her back and Celestia was resting on top of her. Celestia magically pulled another of the large tasseled pillows over and positioned it under Luna’s head propping it up further. Now Celestia was at the perfect angle to give her sister’s horn the attention it deserved. As she curled her tongue around the now slippery surface she felt her wings stiffen and unfurl as they reached skyward.

“Just like an excited filly with her first marefriend.” Celestia privately chided herself. But in reality she didn’t mind one bit. It did feel awfully nice to get to stretch her wings out this much after lazing around in bed for the past several hours.

As Celestia slowly bobbed her head up and down on her sister’s horn she made it a point to have her tongue revisit all her favorite spots; the base of the horn where it emerged from Luna’s forehead, and the shallow spiral grove which she took great care in tracing with her tongue mixed with long sensual licks from base to tip while making lewd sucking sounds in the process.

Luna wasn’t being completely silent herself anymore, despite having closed her eyes again she was beginning to breath harder and every so often a soft moan or sigh escaped her lips. It never ceased to please Celestia to see how much physical pleasure a pony’s horn could provide if it was treated in the right way. She closed her eyes herself and for a while just enjoyed having her chest pressed against Luna’s and feeling their heartbeats become synchronized. Of course the luxury of having a mouthful of one of the most powerful magical objects on the entire continent was certainty not lost on her.

It was possible to get her sister off through her horn eventually Celestia knew, but it could take awhile, especially with a mare who had the resolve that Luna did and having less than half an hour until night court meant that there would not be enough time to get through all the foreplay before duty called. Besides magical release through the horn could have unexpected results especially coming from such a powerful pony. Celestia recalled an example from her early years long before anypony had even heard of Discord when she had given young Luna a particularly lengthy hornjob, lasting over an hour. When Luna finally came it resulted in the formation of a low amplitude gravitational wave that, while doing no real damage, gave ponies the equivalent of seasickness all the way to the far end of the Unicorn Range. The questioning that followed that incident was of a highly embarrassing nature.

Celestia knew that things needed to be hurried along now. And so with a wet pop she released her sister’s horn and sat upright.

“Unnn...Why’d you stop?” Luna mumbled with some annoyance.

“You know why Luna, if you want to get off now’s your chance. You know how frustrating it can be to sit through court without having release beforehoof”

“Umph, there is indeed that...” Luna noted as she rolled over onto her stomach.

After having been together for such an incredibly long time over all even despite that banishment business the two royal sisters knew each other’s behaviors so well that giving instructions during their time together was no longer as necessary as it had been when they were fillies.

Luna simply lay on her chest with her back legs sticking straight out, lifted her tail up and to the side, and waited. As Celestia went to run a hoof over the smooth latex of Luna’s panties to admire how well they enhanced the curve of her beautiful butt she immediately became aware of quite a large and obvious bulge that must have recently appeared in the crease between her buttocks.

“Oh my...!” Celestia breathed as she gently placed a hoof against the large mound under the black latex and pressed slightly forward feeling it squish down a bit under the pressure. Despite Celestia’s fascination with the huge load that Luna had just done in her panties her frustration with Luna’s timing got the better of her.

“Luna, what am I going to do with you? I- we, don’t have enough time for this sort of thing now!”

“Don’t be silly dearest sister. I’m aware of that” Luna said while standing up and trotting off the bed with little apparent regard for Celestia’s plans for her.

“Come its time for us- me, to raise the moon!” Luna pronounced happily while sliding her sleek body along her sister’s as she walked past.

Celestia just wordlessly turned around to follow her little sister across the wide circular bedchamber bare hooves clopping softly against the inlaid polished marble patterning of the floor, all the while wondering where in Equestria this adventure was going to lead. Luna had a way of getting herself out of difficult situations, an important talent for any princess, so Celestia was not overly concerned about the situation now that Luna seemed to have lost interest in getting off, for the moment anyway. Although the show the blue mare made of not feeling at least somewhat horny considering the wonderful sticky mess so close to her wet pussy felt suspicious to Celestia in the extreme.

Celestia also couldn’t help notice how Luna walked toward the balcony doors with her tail raised up high giving her elder sister a wonderfully unobstructed view of her amazing backside and the not so well hidden treasure recently put there. Celestia followed Luna through the large glass and wood latticed double doors out onto the balcony mesmerized by how the red and gold light of the sunset reflected off the slick smoothness of the panties, which was only enhanced by the powerful muscles moving underneath.

Being behind her sister as she walked Celestia did take notice of the smell now coming from Luna’s backside as she trotted along. Even with the waterproof nature of the latex keeping any mess well managed it couldn’t quite keep the odor contained. Celestia didn’t mind though, she had found during her long life that thoes who spent their time only perusing traditional and conservative pleasures tended, over the long run, to become overly traditional and conservative themselves. So long ago Celestia had decided that she should try to enjoy just about anything that was not obviously harmful to her or anypony else.

Celestia couldn’t keep herself from becoming increasingly more aroused as she followed her sister out to the balcony’s edge. When Luna stopped near the banister Celestia made a quick forward step and pressed the length of her muzzle between Luna’s legs and up against the large soft mound, which yielded under the gentle pressure flattening out slightly. This unexpected contact made Luna jerked forward slightly and to the left.

“Now Tia! Be patient! You’ll get your satisfaction soon enough!

“I should hope so Luna” Celestia said as she sat on the cool stone of the balcony floor

“You’ve performed quite a feat working me up to this state, and now despite my earlier intentions of repaying you for this morning’s performance you are once again in debt to me.”

“Humpf! Well, I need to concentrate as you well know and it won’t do to have you back there distracting me.” Luna said but blushed nonetheless.

Celestia found this statement rather ironic as it seemed Luna ought to be doing a rather good job of distracting herself at the moment.

It wasn’t that Luna had to spend all night concentrating on dragging the moon across the sky it was more like she had to give it a good tug in the evening to coerce it to come up above the horizon and from that point on it seemed to traverse the heavens of its own accord until just before dawn it slowed to a stop above the horizon where it decided to settle down until Luna again forced it to continue down so that her sister could raise her brilliant orb.

As Celestia watched her sister perform the first task of her nightly ritual she couldn’t help smiling to herself thinking about what her precious subjects across Equestria would think about the disgustingly erotic state their precious lunar princess was in while performing her most sacred ritual.

Despite her arousal Celestia never could help admiring the view from this balcony. As the Castle was built onto a wide ledge partway up the nearly shear west face of Mt. Lauren It offered what was in Celestia’s mind the finest view in Equestria. Looking over the balcony edge one was immediately aware of the hundreds of feet down onto the roofs of the main sections of the castle and then just beyond in an even more dramatic drop off were the thousands of feet separating the Castle from the gently sloping lush valley floor. The waterfall to the side of the castle added to the spectacle by hurling itself off the precipice into the void. The height of the fall being so great that by the time the water reached the valley floor it was so dispersed it felt like a heavy rainstorm to stand under it.

As Celestia admired the view she had come to love so much she felt quite as though she were being watched. She turned and indeed found Luna gazing at her with a soft smile.

“Indeed sweet sister you are even more beautiful when lost in contemplation. Pray tell, what were you thinking of?”

“Just that I’m one of the luckiest mares to have ever lived.” Said Celestia as she stood back up on her feet.

“Come!” Luna exclaimed swiftly turning about and heading back in through the ornate doors. “It is time to prepare for court is it not?”

“Yes it most certainly is.” Agreed Celestia as she too followed her Sister back into the bedchamber. She did pause, however, just long enough to look back over her shoulder across to the mountains on the other side of the valley to see the full moon peeking above the snow covered peaks.

Back in the tower the two royal sisters crossed to the far wall where an ornate stairway formed from polished marble blocks spiraled up through the celling of the bedroom. As Celestia followed Luna up he stairs she noticed how her sister was putting on a bit of a show by swaying her hips back and fourth while keeping her tail raised. The sight of Luna’s obviously messy backside was starting to make Celestia worry about dripping on the floor. She was also doing everything she could to keep herself from touching it since she felt Luna had bigger plans in store.

When the two sisters reached the top of the stairs they emerged into a large chamber brightly lit with magical lamps shining with a steady white light mixed in with flickering yellow candlelight to give the room a more homely atmosphere. The royal bathroom was also circular but not as wide as the bedchamber due to it being built under the conical roof at the top of the tower. The interior was decorated mostly in white with gold trim, a very classical royal style Celestia thought. The center of the room was dominated by a large circular bath built into the floor and behind that along the side of the wall was an area from which many showerheads protruded from the wall at various angles. Celestia had designed it this way on purpose so that anypony taking a shower was in full view of anypony else who might be in the room. Privacy in this bathroom was a nonissue.

For the first time that evening the two sisters found themselves no longer alone together as a group of six maid ponies stood silently waiting to attend to whatever the royal sisters might request. Celestia noted how the maids blushed when they saw what Luna was wearing and when they realized what Luna had done in them.

“Probably thinking it’ll be up to them to clean her up no doubt.” Celestia thought with some amusement although she doubted that would be the case.

“So.” Luna said turning around in front of Celestia.

“I can see that indeed it is you who are in more need of pleasure at the moment” Luna proclaimed. Celesta was privately dismissive of this statement as she was sure that Luna was quite worked up herself but she was willing to play along for now.

“Your condition is... exciting me I'll admit. But you seem to have a plan, may I know what you are up to?” Celestia asked while Luna made a point of rubbing Celestia’s flank with her hoof.

“Simply this” said Luna coming back around in front of her sister.

“Since I can hardly properly attend to my royal duties in this state, as much as I’d like to, I hereby decree that for the duration of this night these are to be yours!” and with that Luna enveloped her shiny panties with the blue aura of her magic and with great care peeled the black latex off her flanks being careful to contain the entire mess inside plus using further magical finesse to ensure that as little as possible remained smeared between her own butt cheeks.

Celestia did mange to find herself a bit surprised at Luna’s course of action due to the fact that Luna did not normally give up her pleasures so easily but it made sense in this case decided Celestia due to the pressures of time and formalities.

Having safely removed her panties and their precious contents Luna again addressed her sister.

“I expect to have these returned to me in the morning upon the completion of my duties with the condition that they must be even more full than they are now.” Luna said with a rather saucy look.

Celestia found herself becoming very excited by this challenge from her sister and could feel her wetness begin to spill over and drip down her back legs. Her pussy began to throb in anticipation as she watched Luna use her magic to spread the brown sticky mess all the way up the inside of the crotch and front of the panties humming to herself the whole while.

“There!” exclaimed Luna holding the filthy latex undergarments right in front of Celestia. “I do think you will find these to be most... enjoyable”

Celestia, despite her earlier misgivings found herself agreeing with Luna’s assessment. With care she levitated the panties out from Luna’s magical hold.

“Oh yes, Luna I’m going to have a lot of fun tonight with these, Thank you so much dear sister.” Celestia said with a smirk.

For the sake of both her sister and to further disturb the bath assistants who were looking on uncomfortably Celestia made a show of turning herself around and slowly levitating the slimy latex carefully up her legs all the while making sure to keep the material from actually coming into contact with her until the panties were fully in position.

Being a physically larger pony than her younger sister meant getting the panties on was not exactly an easy task. They were after all already tight on Luna. However, between the natural stretchiness of the latex, Celestia’s persistence, and if she was going to be honest with herself maybe a bit of magical persuasion, Celestia eventually won out.

“Mmmhh...” Celestia breathed running her tongue over her teeth.

Celesta was momentarily left speechless as the extreme tightness of the panties squished her sister’s warm mess into every fold and crevice of her wet pussy. Not only that but she could feel it being squeezed all the way up to her tail base and also towards the front of the panties.

As Luna looked on with obvious interest Celestia lowered her head down in pleasure that her horn nearly touched the ground. She was in fact having a difficult time just standing up. Knowing it was her own sister’s poop that was being forced into her vagina and the warm squishy sensation that came with it was nearly more than she could resist.

It certainly wasn’t as though this was her first time being stimulated by messy play but it had been a while, and it hadn’t before involved sexy panties or her sister at least since her return. Clearly, thought Celestia, she should do be doing this more often.