Tranquility

by Oliver-England

Rating: mature
Tags: Alternate Universe, Drama, Original Character, Porn, My Little Pony: Friendship is Magic, Fetish, Sex, Twilight Sparkle, Princess Celestia
Length: 4203

After receiving a letter of request from her former mentor, Twilight takes it upon herself to investigate a student's rampant mimic spell.

Upon request from Princess Celestia, Twilight Sparkle investigates a mimic with a bad habit of condescending, protective, borderline motherly behavior. However, as it turns out, the alicorn's powers of intervention might be less strong than she initially anticipated.

(Warning: This story contains strong ab/dl fetish content)

Art Work used with permission from FluffyXai

Published 2018-06-29 19:00:07 UTC
Last updated 2018-06-29 19:00:07 UTC

Sunny Days Nursery

“Dear, Twilight Sparkle

Two days ago, I received a letter from one of my brightest pupils, Sapphire Gem asking for help on one of her experimental spells. When I went to evaluate her project aera, I discovered that the pony mimic that Gem had created to be an assistant for the local Kindergarten had become a little too ‘real’.

I’m not sure how Gem spawned such a self-sufficient magical entity, but given the mimic’s kind docile nature, I felt it would be far too unethical to simply cast it away.

However, Gem’s creation still needs a major logical correction before I let her take it into a real kindergarten classroom. So far, the mimic has gotten much too emotionally attached to the few fillies and colts it’s come in contact with for us to trust it.

That’s where you come in.

I know it’s short notice and I know it’s a lot to ask you. But of any of my former students, I believe you’re our best hope at correcting the mimic before she deviates any further from her intended purpose. You can find the creature at the former Sunset Nursery on the corner of East 11th street and Steward Ave in downtown Canterlot.

Thank you ~ Celestia.”

“Hmm, Sunset Nursery.” Twilight muttered to herself as she paced down the empty cobblestone street of her childhood town. All around her, store lights and window displays began going dark as the last few customers left with their goods. However, just a few meters ahead of her, a white limestone building with a bright rainbow sign continued to illuminate the dim street with a faint colorful glow.

Not wanting to delay the confrontation any more, the alicorn flew over to the house’s solid oak door and knocked on it with her hoof. “Hello?”

Moving back from the door, Twilight did a little hop to readjust her saddle. Looking at the building’s lone display window, it was very apparent by what was visible that the two story building was still at least partially a day care.

To the alicorn’s surprise, the front door swung open, revealing a white unicorn mimic roughly Celestia’s size standing with a passive grin on its face. Glancing up at the creature, she flashed it a sheepish smile. “H-hi, my name is Twilight Sparkle-“

“Twilight Sparkle?” The being happily exclaimed, stepping aside to let the mare in. “Why, Celestia has told me you’d be coming tonight! Ooh, you poor thing, you must be so tired from your trip. Here, let me take those bags from you.” She said, igniting her horn with a crystal-clear radiance.

Stepping forward in accordance with the mimic’s wishes, Twilight’s mouth went slightly agape as she watched her bags seemingly levitate off her body. “Y-your magic is clear?” She questioned, climbing up a single step to reach the front door of the building.

“Well duh silly, that’s because I’m a special unicorn.” She replied, as she gently closed the door behind the alicorn, locking its mortise mechanism into place. Walking over to a blank chalk board in the corner of the room, she gestured to an array of green seat pillows that surrounded the thing, “Now, before we talk, I want to set some ground rules.”

“G-ground rules?” Twilight sneered, genuinely a little bit offended by the faux pony’s audacious manner. Trying not to spoil the situation though, she swallowed her pride and proceeded to follow the mare to the corner of the room. Making her way to one of the pillows, she planted her purple flank on its cushy surface and let her legs rest comfortably on the room’s plush white carpet.

“Yes, ground rules.” The mare said, using her powers of levitation to lift a piece of chalk in the air. Brushing her thick silver mane to the side, she began to write on the board.

Squinting slightly, Twilight continued to stair uncomfortably at the board. Underneath a heading that read, “Rules of Sunset Nursery” then the two consecutive lines, “1. Don’t disobey mommy, 2. Don’t make mommy sad”.

“Tell me Twilight, can you read?” She questioned, staring down the mare with her ruby red eyes.

Staring up at the much bigger pony, Twilight sank in her seat cushion a little, “Y-yeah I can. Listen, I-I’m just here to talk to you about teach- e-excuse me?”

“Twilight, before we go one, I need to put this on your horn.” She said, pulling out a clear crystal ring.

“What? Is that an inhibitor?” She questioned, hopping to her hooves.

Glaring down at the girl, the white unicorn insisted, “Ah-ah-ah. If you leave now, I’ll be very upset- and you don’t want to make me upset.” She said, offering the piece to the girl, “If you wanna talk, you have to put this piece on your horn. I need to know I can trust you.”

Looking up at the mare, she reluctantly lent out her hoof. “I-I guess I can put it on, if it means we can talk about why you’ve been so clingy.” Closing her eyes, she lifted the piece to her horn and pushed it down it’s tip.

“ Here, let me help you.” She said, pulling the accessory down Twilight’s horn with a gentle force. “There, now that we know we’re both safe. Let me hear about why you came here.”

“Well… okay. I don’t exactly know how to tell you this, but Sapphire Gem needs you to cut out the foalcare thing.” She said, using both her hooves to push herself back on the cushion a bit, “Don’t get me wrong, uh- what’s your name?”

“Sunny.” The white mare answered, with a pleasant but somewhat removed smile.

Chuckling awkwardly, Twilight nodded. “Hehe, well as I was saying. Don’t get me wrong Sunny, being motherly and intimate with foals is an important part of being a kindergarten teacher. But, you can’t go around treating every filly or colt like it’s a baby.” She said, continuing to sink back into the pillow’s overly plush microfleece surface again. “Being that young isn’t just about feeling supported. It’s about making those fillies and colts feel intelligent and self-reliant too. You know, they need to know the importance of independence by the time they move on to bigger, more complex social and educational things.”

Pretending to look a little dejected, Sunny nodded. “I guess you’re right Twilight. You know and I know that I’m no real pony- nor am I capable of creating an offspring of my own.” She commented, Setting her hoof passively on the chalkboard, before glancing at the rules. “I just wish I could take care of a foal for just a single day, you know? Experience being what it’s like to raise a little one who loves and depends on me for just a little bit.”

Glancing at the chalk board’s stale forest green granite, Twilight swallowed nervously, “W-well i-if I found you a foal tonight, would that be enough to appease you for now, right? Plus, I’m sure if you work well at the Kindergarten for a while, they’d eventually let you work at a nursery too.”

“Hmm, that’s a thought.” Sunny responded, walking up to the mare. With a devious smile on her face, she sat down herself. “You do want to make sure I’m happy, right Twilight?”

“Well, yeah.” Twilight nodded leaning back a bit as she lost more and more of her personal space.

Reaching forward, Sunny reached under Twilight’s hooves and lifted her up. “If that’s the case, I want YOU to be my foal Twilight!”

Her eyes opening wide, Twilight instinctively began flapping her wings like a chicken caught between a rock and a hard place. “Woah, me a foal? I can’t be a foal.” She yelled loudly, “I-I’m like twenty-four, I’m old enough to have a foal!”

“Oh hush,” she cooed, pressing her head against Twilights, “Why, you might be bigger than the average foal. But, you’re still very young in alicorn years and you’re still much smaller than me. Besides, it’s only temporary, right?”

Her cheeks turning a shade red, Twilight yelled, “N-No, I can find you an actual foal if you want. But, I’m not gonna humiliate myself like that.” Despite her best intents, the second she looked the other mare in the eyes her wings seemed to lose their ferocity as every second made them heavier and more sluggish.

“Heh, awh. That’s cute dear. Unfortunately for you, I’m the adult in this situation.” She said, nonchalantly, holding the much smaller mare against her chest as she walked up stairs. “Thankfully for you, we don’t have to travel very far to get you fitted for your diadees!”

“Wha- b-but I don’t wanna wear d-d-diapers.” She stuttered, as she continued to vainly struggle against Sunny’s strength. Looking up with salty tears forming in her eyes she spouted, “T-this isn’t fair! I-I trusted you when I put on this stupid inhibitor.”

Continuing up the stairs, Sunny passed through baby gate at the top of the stairwell and sighed wistfully, “Oooooh, silly silly Twily. Wouldn’t you agree that rule #1 of foalhood is not to trust strangers.”

“Well-yeah, B-but I’m not a foal!” She protested, feeling strangely heavy and sluggish as she was held out by the much bigger mare. Looking down, at her tummy, she watched as her butt was planted what looked to a plastic-foam matt of sorts. Glancing at her surrounding area, she realized that the rather sizeable loft she suspected was a nursery was just that; except bigger.

“You keep saying that, but just look at how passive you are about all of this?” Sunny teased, placing a single hoof on the mare’s purple chest and pushed her gently onto her back.

“I-I’m not being passive.” Twilight spouted defensively as she drifted backwards. Resting the back of her head on the soft foam, she watched the glittery celestial patterned mobile flying spun and twirled in front of her face. “I-I just mean if this really is only going to be for a day, then I should protest that much. I mean, it’s not the worst situation I’ve found myself in.”

“Exactly! You know as well as I do that all momma Sunny wants to do is take care of little foals like yourself.” The white pony cooed as she begun sorting through the drawer. Picking a bottle of white talcum powder, she leant it out to the smaller pony. “Tell me something Twilight, what’s this?”

Breaking her gaze with the foal trinket spinning over her, she squinted a second before confirming what the bottle was. “Oh- um, that’s a bottle of talcum powder.” She exclaimed, grabbing it from the mare.

“Hehe, talcum powder? That’s a fancy word for sucha little filly.” The white mare teased as she began digging something else out of the drawer.

Twilight, who was still dumbfounded by the situation she found herself in, continued to sink deeper into her pit of disbelief as a diaper the size of pillow was unfurled in front of her. Worst of all, it had her cutie mark on it.

“W-where did you get that?” Twilight exclaimed, backing up on the changing table in a meek manner. “H-how’d you get a diaper like that?”

Smirking a tad, Sunny continued to smile. “Heh, what do you mean, where’d I get a diaper like it? I don’t think you realize how much time I had to prep for your arrival, Twily.” She smiled, laying the massive disposable diaper out on the changing table’s big foam mat, “Why, I control EVERYTHING in this facility. How do you think I got the furniture this big? How do you think I got the wallpaper in here to your liking?”

Looking to her side, Twilight’s jaw dropped as she saw just what the mare was talking about. Every inch of the loft’s wallpaper was covered in cutie marks from her friends and other residents of Ponyville. “W-whhha?” She questioned, before a tight grasp around her cannons tugged her forward and lifted her backside.

“Heh, right? Momma Sunny is magical, isn’t she?” the faux mare boasted, as she lowered her little one’s bare bottom onto the diaper, giving it a second to sink in.

Twilight’s mouth once again went agape as her naked bottom was enveloped in the cushy fluff of her diaper.The mixture of realization and physical pleasure that came with her new piece of clothing, masking her sense of anxiety with strangely euphoric pleasure. Suddenly, her body felt a lot warmer and relaxed.

Watching as the crystal inhibitor on Twilight’s horn pulsated a topaz yellow, Sunny grinned. “Oooh, your clean diadee feels so nice, doesn’t it Twilight.”

Smirking in an inebriated manner, the alicorn mare nodded her head.

“Heh, well thank you for holding the powder for momma.” The mare complimented, as she snatched the bottle from her little one’s hoof. Turning the container upside, she unscrewed the cap and poured enough powder on her little one’s vulva and butt cheeks in that the haze of white powder filled the air with a familiar uniquely foalish scent.

For Twilight, the scent of the original-formula foal powder continued to elate her senses. Letting her head drift back the foam matt, she once again homed in on the stars above her. This time however, they seemed a little bit more translucent and glimmery; almost like they were real stars.

Setting the powder aside, Sunny folded the thick front side of the diaper over her little one’s crouch and tummy. “Ooh, does momma’s wittle fiwwy wike her diadee?” She cooed, continuing to wrap the tapes around the cutie-mark banner on the front of her nappy, “I like your new diadee, do you?”

“Mmmm?” Twilight questioned, staring lazily at her tummy. Sticking her hoof in her mouth, she watched as the last two pieces of her new diaper were fastened around her tummy. Most surprisingly however was how severely the thing’s bulky nature bowed her legs. “W-why is diadee so big?”

“Heh, well the diaper size wasn’t my choice to make.” She said, grabbing her filly’s hooves and sitting her up straight. “It’s funny too, cause at first I wasn’t sure if you were more of a kindergartener or a preschooler. But seeing how well you look in your huggies, and I’m starting to think you really might be a foal!”

Frowning a little, Twilight let her droop down as she glanced at the diaper enveloping her mare hood. “I-I’m notta filly. I-I big mare.” She argued as a bit of drool dribbled out of the corner of her mouth. Curiously, she pushed at her padding with both hooves, pushing and mushing it’s polythene lining filling with her hooves.

“Ah-ah-ah” Sunny interjected, swatting Twilight’s hooves away, “Momma doesn’t like little ones playing with their diapers. That a good way to cause a big icky mess.”

A little downtrodden, Twilight vainly buckled her hatches around the padding and ached side from side, “I-I don’t under-“

“You don’t understand?” Sunny interjected once again, using her hoof to tug the former mare’s bushy colorful tail from out the backside of her diaper. Smiling, she reached her hooves out and picked her up, cradling one hoof around Twilight’s purple back and the other one around her thickly wrapped bottom.

“I-I big mare.” Twilight lazily interjected, as she rested her cheek on the much bigger mare’s shoulder; downtrodden like a little filly who ripped away from a candy that they really wanted.

She set the mare bottom first onto a cushy lavender colored mat then smiled in a sympathetic manner, “Well, Twily- can I call you Twily?”

Looking up with an expression of passive bemusement, the mare nodded as she leaned on her back two hooves a little.

“Well Twily, my guess is you feel all strange and weird cause you don’t know what happened to your little flower- I bet it feels funny doesn’t it?” Sunny questioned, turning around momentarily to prep a rather big, ocean-themed bouncer.

Twilight, meanwhile watched as the mimic flashed her white backside. She typically wasn’t attracted to other mares; but there was something so enticing about the way her beautifully groomed silver tailed swept back and forth across her rear; only rarely flashing glances at her clean glistening sex. Obviously preoccupied with her thoughts, she stuttered, “I-I just feel a little weird is all?”

“Awwh, is that right?” The white mare boasted, playfully spinning a plastic blue dolphin toy on the bouncer’s tray. Turning around, she paced back over to her little one and begun to sit down, “Well, you have nothing to worry about. I promise you that all your problems are all in your tummy.”

“T-tummy?” She questioned, watching as the much bigger mare laid on her side and began sprawling out her back left leg. In a haze of morbid curiosity and lack of control, she gazed down at the mare’s exposed breast, enamored by the shape of her bulbous gray nipples. Against her best wishes, she let her draw drop a little as saliva coated her hanging tongue.

“Hehe, come on princess. You’re welcome to try momma’s breast, it’s perfectly natural for baby foals to wet feed.” She said, taking a deep breath as folded her front hooves.

Continuing to stare at the mare’s breast with a transient expression on her face, her mind became hazy with thoughts of fullness and ethereal bliss. Getting down on her tummy, she began crawling over to Sunny, the uncoordinated scooting of her hatches causing the crouch of her diaper dragging all the way.

Watching eagerly as Twilight finally succumbed to her desires, she couldn’t help but giggle as the alicorn’s massive diaper began falling down her butt. Knowing her prerogative though, she continued to splay her legs wide. “Now now, Twily, there’s no rush. I assure you momma isn’t gonna run of milk to nurse you with.”

Folding her hooves close to her chest, Twilight leaned her face in close to Sunny’s crouch and wrapped her lips around one of her many bulbous teats. At first, the sensation of the breast in her mouth felt like the not much more than a dull suppression. But, the second she sucked the skin inwards, the sweet savory taste of the mimic’s milk sending her further into a spiral.

Looking back at the smaller pony with a prideful smile on her face, she used her magic to tug her baby’s diaper back over her exposed tushie and relaced her tail through it’s hole. Content with Twily’s very apparent daze, she cooed, “Awwh, who’s a clever girl? You love momma’s milky don’t you?”

“Mmm? Mmm-hmmm.” Twilight moaned pleasantly as she closed her eyes.

“Oh, that’s wonderful to hear. Why, it seems you’d do anything for momma’s milk, wouldn’t you?” Sunny questioned, boastfully.

Still infatuated by the rhythmic sensation of sweet milk spirting onto the back of her tongue, Twilight once again let out an inebriated, “Mmmphmm.”

“Well, that’s all I needed to know.” The mare said, using her magic to separate her bare breast from her little one’s mouth. Standing up, she shook her rump a little.

Perplexed by her ‘mommy’s’ sudden departure, Twilight reached a hoof and pathetically mumbled some gibberish. Her once beautiful amethyst eyes dulled to dim shade of lilac.

“Hehe, awh. Someone is a needy little foal. Tell you what, make potty pants for momma and mayyyybe I’ll let you have just one more little suckle of milk.” Sunny teased, playfully waggling her tail.

Glancing back up at the much bigger pony just a step ahead of her, a bemused smirk crossed her face Acting in contrast to her last few strands of self-control, she began physically straining to ‘relief’ herself to no avail.

Amused by her little one’s various long-winded groans and grunts, she took the matter into her own hands. “Oooh, leave it to the baby to be too dumb to poop herself. Come on Twilight, you’ll get another later” she said, keeping her distance from the alicorn as she lifted her in the air with her magic.

Twilight, who was blinded by her desire for more milk reached her hooves out vainly as she was slipped into the room’s lone baby bouncer. No matter how far her thickly padded backside sank into the contraption’s hanging seat, her rear hooves got no closer to the ground. She was stuck.

Continuing to passively smile at the desperately needy mare-foal stuck in front of her, Sunny couldn’t help but coo, “Awwwh, it’s okay baby. You’ll get your milkies the next time momma has to give you changies.”

Smirking, Twilight’s quiet struggle against the bouncer subsided into as she thought about the mare’s words again. Her face turned a rosy, then as the sensation of anger washed over her, she whined, “Naaaawht faiw!” before bursting into a loud messy fit of tears and moaning.

“Heh, what a baby.” Sunny cooed, as she lit her horn with a mysterious blue aura. Tilting her head up, she let the magic wash over her body- her pristine pearl colored fur, silver mane, and princess like façade vanishing into the haze; leaving behind a much more typical looking cobalt pony with a sapphire main, and a diamond cutie mark.

Despite the spectacle in front of her, Twilight continued to fidget and kick around annoyedly, to the point that she started banging on the plastic tray’s toys; the added rattling, causing the piece of furniture to bounce and gyrate her intended.

Planting her backside back on the nursery’s typical carpet, she sighed in relief as she looked at the frustrated mare-foal in stroller. “Oooh, that took a little longer than I thought it would Twilight. You are a tough cookie.”

“Mooooommy!” Twilight continued to passionately exclaim, “I wann ouuuuut!”

“Hehe, maybe later.” She answered in the most passive motherly tone as she could. Looking Twilight in her jaded eyes, she grinned, “You’re an awfully fussy foal you know. When Celestia arrives to evaluate the situation, she’s gonna be in one heck of a surprise.”

Frowning uncomfortably, Twilight’s fussing seemed to dim down a little upon hearing her former mentor’s name.

“Heh, oooh that is going to be embarrassing for you, isn’t it honey?” Sapphire Gem grinned, a little amused by her foal’s sudden state of distress, “Don’t worry though, she knows you were getting hypnotized. Besides, it’s perfectly natural for a mare your age to wear diapers and wet feed.”

“R-rewwy?” Twilight questioned, tilting her head to the side as she stuck her hoof in her mouth.

Nodding her head, Sapphire Gem giggled. “Hehe, of course. Now, you enjoy your bouncy-wowncy toy while momma gets the paper work for her thesis done.”

“Wait- b-but, milky!” Twilight whined again, frowning as the present conversation faded from her short-term memory.

Ignoring the mare in the bouncer, Sapphire Gem continued to walk towards the stairwell. “Later Twily, you will get your milky later.” She said, shutting the baby gate behind as she went. Walking down the stair well, she listened patiently to the sound of a foal crying in the background got progressively louder and more irate.

It was the sound of a job well done.

Author's Note

Notice - This is the unedited version of the story. My editor is currently helping me with several projects at the moment, so please bare with any grammar related issues. I assure you, they won't be there forever.

*Spoilers*

So, I originally posted the following explanation as a response to a comment down below. But, just in case anyone wanted to know the story's ulterior purpose, I've posted the explanation down below!

In essence, the relationship between Twilight Sparkle and Sapphire Gem/Sunny is supposed to be a cautionary tail about bloodsucker relationships.

Without going into too much detail. The story starts out with Sunny deliberately wanting Twilight to crave her affection (as a foal with no sexual attachment). While Twilight is reluctant at first, Sunny's name, general Celestia-like stature, demenor, and hypnotic gaze slowly but sure draw Twilight in. In her own accordance, Twilight accepts the invisible ring (wedding ring) and later on the changing table has her sex taken by Sunny (via the sprinkling of the white baby powder and diaper wrapped around her waist. The blue-dolphin designed baby bouncer is meant to symbolic of the two being in a lesbian relationship. However, the instant Sunny is sure she has Twilight under her complete control (during the breastfeeding/messing request part) she realizes that she has everything she needed from Twilight (the completion of her experiment) and pushes her aside by putting her in the baby bouncer.

Twilight meanwhile, is sitting in the baby bouncer, in virtually the most humiliating attire possible, desperately reaching to be close with the mare- who doesn't really love her back- that she's grown attached to.

Any who, I hope you all enjoy! I'm not sure if I'll be doing anymore 'mature' stories in the immediate future - namely because I have a number of slice of life ABDL/Pony stories I've been working on. But, this story gets a warm enough reception and sparks some genuine demand in the comment section, I'll consider creating more stories like this in the future!

Enjoy!