Gift Exchange

by Tsunogami

Rating: mature
Tags: Romance, Fluttershy, Porn, Fetish, Slice of Life, Sex, Sweetie Belle, My Little Pony: Friendship is Magic, Princess Cadance, Flurry Heart
Length: 5143

Birthdays are supposed to be full of surprises, preferably good ones.

Cadance has decided that her daughter is finally old enough to take the next step in their relationship. There are of course, as always, "minor" complications.

This short story of mine came about after having run across this most excellent image: https://derpibooru.org/1436347?q=flurry+heart%2C+diaper+fetish

I love the idea that not only does Flurry Heart simply stay in diapers while growing up, but also keeps the same color and style as well, although I assume a change from cloth to disposable once past infancy.

Anyway, hope ya'll enjoy this one as much as you like my previous offerings.

And of course my boilerplate warnings with most of the trash I write... Contains: diaper fetish concepts, scat, sex, foalcon, and incest.

Published 2019-02-01 17:50:01 UTC
Last updated 2019-02-01 17:50:01 UTC

The fucking chapter.

Author's Note

I would like to point out that in the show itself Flurry Heart looks fucking ugly as hell, which is no different from my opinion on how all human infants look anyway, so I'm not surprised. Hopefully, she'll start to look a lot better with a few years added on.

The fucking chapter.

The thickness of Fluttershy’s diaper had increased somewhat overnight due to the large amount of pony poop it now contained. Most of the original pink plastic had been replaced with a darker, subtly more grayish color, shading to brownish around the leg holes and tail hole. The brown tint was probably creeping a way up the front of the diaper too by this point, Cadance guessed.

Fluttershy, who was laying on her stomach, had her head turned to the side and was drooling slightly onto the protective plastic bed sheet, the trace of a smile on her lips.

The sight gave Cadance a near instant hard on, and she sighed, closing her eyes.

She very determinedly turned away from Fluttershy and, slowly getting out of bed, strode towards the high windows pulling the curtains further open with a telekinetic tug which was perhaps a hair more forceful than necessary.

This was the first time in some while, over a year certainly, that Cadance possessed any male organs between her legs. Despite what some of the lucky few ponies who had seen her like this on previous occasions might have guessed, she did not actually like having a penis. Well, perhaps more accurately, she did not like having to grow one, and then un-grow it. To be done properly the process took several days either way, and during that time, her insides were too mixed up for her to want to have sex. An almost unbearable state of affairs for one of the most perpetually horny mares in all of Equestria. Plus, once she had the thing, she often had to hide it, and none of her carefully selected and curated collection of thongs fit right. Even regular panties caused issues. That, and she was hard nearly all the time, and there was only so much time in the day for blow jobs from her maids. She had had to apologize to the whole lot of them that one day she had gotten carried away and had them sucking on her cock for hours straight, rotating them in shifts.

Cadance screwed up her face in private shame and embarrassment at the memory. Palace staff were free adult ponies, not sex dolls, and needed to be respected as such.

But regardless, she had her long thick pink shaft ready to go today for a reason, and that reason was not the beautiful pony snoozing contentedly behind her wearing a disposable diaper near to overflowing with warm pee and slimy poop.

Oh, the two of them had done some very kinky things the previous night, sometimes involving diapers, sometimes not. But all that had been a trial run, just warm up, to make sure that her newly re-formed, and thank Faust, temporary! shaft, was properly up to the task.

The real reason, the important reason, why she had put herself through this again, was because today was Flurry Heart’s 11th birthday.

This would hardly be the first time she had been quite intimate with her tween daughter, but the stallion cock was something special. Cadance knew that Rarity had been the first pony Flurry Heart had been penetrated by, and later Twilight herself had joined in the fun, but Cadance had considered herself too big to experience the same pleasure, until now.

She spent a few seconds trying to decide what to wear for her immanent trip to her daughter’s bedroom down the hall. She could stay in the diaper she had on now, identical to Fluttershy’s except everywhere the yellow pegasus’s diaper was pink, hers was purple, and a size larger. That and she was only wet. Or she could put on a pair of cute denim short-shorts, that was a more normal thing for her to wear about the palace. But the diaper did a better job of covering up her ridged shaft, and there was no way she was going to be anything but hard for a while. She decided to stay in her diaper but forced herself to resist the urge to use it as her morning bathroom trip, on the grounds that she had much more important plans for the contents of her body.

Again glancing down at the peaceful Fluttershy laying on her bed, Cadance trotted as quietly as she could across the cool blue crystal floor to the tall golden double doors and let herself out. She had a birthday present to give Flurry Heart.

Fortunately for the sake of public proprieties there were no guards on these doors as they led out into a corridor which itself was part of the private living areas of the royal family. Among palace staff only upper servants would dare to venture here, every one of whom Cadance had personally hired for the job.

The passageway was not as long as many to be found in the ancient crystal tower but long enough so that it was noticeably curved as it followed the contours of the exterior walls. Cadance wished not for the first time that there were more windows, but the crystal of the walls did seem to be translucent at times, almost as though the palace knew when and where ponies wanted better light.

Cadance knew that she was mentally babbling, fixating on trivialities when she was so close to such an important bonding experience with her daughter. Something she had little time for she realized ruefully, now finding herself standing in front of Flurry Heart’s bedroom door.

Well, there was nothing for it now, they were going to have lots of fun today and that was that!

Opening the door from the hallway into the outer sitting room of her daughter’s private chambers reveled nothing besides the usual. Things were mostly in order aside from the occasional item of clothing draped over a chair or stack of books that seemed about to fall over. The only light came in from between half open curtains to the left. Cadance crossed this space without much hesitation, drawn on by the now increasingly apparent smell of a dirty diaper emanating from the next room beyond, making her even more aware of her own wet diaper rubbing against her inner thighs.

“Flurry dear?” Cadance asked quietly as she pushed open the door to the bedroom itself.
Her inquiry was met with silence, which was not what Cadance had been expecting, weren’t fillies supposed to be all excited on their birthday, waking up early and all that? Taking a look at the large bed provided a fairly definitive answer as to why all was still quiet.

Flurry Heart was not alone in her bed. She was laying all stretched out alongside Sweetie Belle who surprisingly was not wearing a diaper, which Rarity claimed Sweetie almost always wore to bed, but a high wasted glossy black vinyl plastic skirt and a loose see-thru white blouse tucked into said skirt, plus a wide black choker, almost a collar. From her position past the foot of the bed it was easy for Cadance to see that Rarity’s younger sister had no panties on at all. The only thing the young mare was missing to complete the look of a young cheap whore just off the street, was a pair of glossy black platform boots …which Cadance quickly saw were indeed present and laying to the side of the bed.

For a few seconds Cadance just stood there in confusion. Weren’t they in the Crystal Palace? Was it not difficult (hopefully impossible) for anypony to simply arrive during the night to be intimate with the daughter heir of all ponies? And without Cadance herself knowing, again, of all ponies? Didn’t they have guards? But then, the more she thought about it, the more it seemed this was something not impossible to do. After all Sweetie Belle was, if not generally known among those who worked in the palace, known by the ponies who really mattered including of course Flurry Heart, who was apparently capable of having her smuggled in. Perhaps with Rarity’s help? Or Twilights? Celestia’s??

If nothing else, this explained why Flurry Heart was still sound asleep on her birthday morning. Faust knew how late (or early) the two of them had been up till.

Cadance had to take a deep breath and rub her nose with a hoof to calm herself. One way or another, somepony was going to get in a bit of trouble, and chances were good that that pony was turning 11 today.

However, it would not do to temporarily damage her relationship with her daughter by being angry with her before any of the day’s activities had even begun. No, reprisals and such could wait.

…then again…

Cadance strode over to Flurry’s side of the bed while being careful to keep her hoof falls quiet, then gazed down on the snoozing pair. Flurry Heart was on her side wearing a light green cami top, perhaps a size too small, and with one of the shoulder straps having slipped down, that went well color wise with her light teal disposable diaper. That diaper was struggling to do its job despite being very good quality. It had been thoroughly soaked in the front and over half way up the back too, Cadance saw as she leaned over the bed for a better look. And was quite messy besides, with obvious brown stains leaking into the otherwise white fur around the leg holes. The smell was… impressive.

Sweetie Belle for her part was lying face down with her back legs spread as far as the tight skirt would allow, with her tail laying limply off to the side. Cadance contemplated for a bit as to how the young mare could breath, buried as she was in the pillow.

“Well now what.” Cadance breathed to herself. She hadn’t counted on ‘guests’, but her body was telling her that either she needed to go through with her plans soon, or her diaper was going to get messy whether she wanted it to be or not.

Walking back around to the other side of the bed to be next to Sweetie Belle, Cadance reached out a hoof and pressed gently but firmly against Sweetie’s butt, gliding over the smooth surface of the plastic skirt in slow circles. Cadance had to admit, Sweetie did have a fine ass, and it was always a pleasure to play with it.

“mmm… Flurry, you woke me up…” Sweetie Belle mumbled into her pillow.

“I’m not Sweetie Belle” Cadance said in a normal voice, which seemed quite loud after all this time trying to be quiet.

Sweetie Belle, in the process of turning over to face Flurry Heart jerked suddenly and froze in mid turn.

“Would you by any chance want to explain how exactly it is you managed to appear in my daughter’s bedroom without me having any idea about it? Hmmm?

“I uh, I’m sorry, Cadance! Ah- Princess! Prince Shining told me I could! Flurry asked him and he let me, I mean she wanted him to let-”

“Ok! ok, that’s- you’re not the one to be in trouble about it… I think.”

“You, on the other hoof young lady, might very well be! Cadance said pointing her foreleg at Flurry Heart who was now sitting quite erect with eyes wide having been unceremoniously roused by all the loud voices.

“However… it does so happen to be your birthday, and at least I find it’s Sweetie Belle who is sharing your bed and not some random filly I have never seen before. So I’m willing to be… lenient.

“And just where do you think you’re going…?” Cadance said without looking away from Flurry Heart as Sweetie had been creeping towards the edge of the bed.

“I- well, as you say it’s not polite for me to be here anymore and-”

“I said nothing of the sort.” Cadance replied swiftly.

“My daughter did apparently want you to come, and far be it from me to say she can’t have a friend over, even if that friend does look like she came from a street corner at 3 in the morning while advertising 15 bit BJs…”

“Sorry, Sweetie Belle, I’m letting my aggravation carry me away. I dressed like that all the time at your age, so I shouldn’t be hypocritical. But I am annoyed that this daughter of mine felt it necessary to hide what- who? she was doing from me, and in our own home at that. This at least is behavior I will not tolerate. Therefore, birthday or not, I will punish-”

“Mom I-”

“BUT!”

“But I will make it a punishment you will enjoy, and since you seem so eager to have Sweetie Belle as part of your special day, I’ll make sure she at least gets to watch.

“What will you do?” asked Sweetie nervously, looking like a cat confronted by a vacuum cleaner.

“Probably little you haven’t already.” Cadance said dryly. Though she considered to herself that Sweetie Belle didn’t have the same equipment that she did for the moment.

“Go have a seat on that and pay close attention, ok?” Cadance said waving a hoof towards a plush chair on the other side of the bed.

Sweetie seemed eager to put at least a little distance between herself and a potentially hostile Princess and shuffled off to the chair. Cadance watched the slutty looking filly in her tight skirt and considered that she really would have to punish that one too, and soon.

But first thing’s first!

“Now, little lady… what do you have to say for yourself?” Cadance asked Flurry Heart as she climbed up on the bed to sit in front of her daughter.

“I’m sorry, I promise I won’t do it again, I’ll tell-”

“No, not about that, about this.” Cadance said as she reached a hoof forwards and pressed it firmly against the front of Flurry Heart’s disposable, and obviously very dirty diaper. The shiny outer plastic layer glistened faintly in the dim light of the room as it was pressed inwards.

You’re so messy its leaking out all over, I know you have plastic sheets, but still these silk ones on top will have to be cleaned. And the palace staff won’t be happy. Didn’t I tell you to take these off the bed and sleep directly on the plastic sheets when you wear a diaper for the night?

“Well, didn’t I?”

“Yes mom.”

“Yes indeed, well, let’s get these off the bed before we make things much worse.”

A brief surge of power through her horn and the stained sheets were piled on the floor away from further damage.

“Now I want to know, just how messy you are in that diaper?” Cadance asked, finally replacing her stern expression with a genuine smile.

“Are you messy here?” She asked pressing her hoof against the diaper right under Flurry’s tail.

“Uh yah, very.” Came the hesitant reply.

“Ok, what about here?” Cadance asked moving her hoof up along the diaper to rub in circles over a place about where Flurry’s little slit should be.

“Yah… there too” Flurry said while blushing.

“Oh really? And do you like being messy in your diaper there?”

This question got more blushing, a squirm, and even a giggle.

“Yes, I thought that might be the case. So what about here?” She asked moving her hoof up to only two inches or so below the top of the diaper.

Flurry nodded.

“Yah there too.”

“Really, I see…” Cadance said

“So in that case you really must like being messy then…”

“Yah, just like you mom!” Flurry Heart said, apparently deciding that whatever her fears about punishments were, they were so far proving unfounded.

“You’re a silly filly, you know that? But for your information, I’m not messy at all.”
This minor revelation resulted in a look of confusion to pass across the filly’s face.

“You’re not?”

“Nope, just quite wet.”

“Yes, my diaper would usually be messy as well by now, but it just so happens to be a certain filly’s birthday, and this certain filly loves lots of poopy in her diapers. Which gives me the idea for a birthday present.”

“Now I’m not angry anymore, but if you want to keep me from getting angry again you do as I say ok?”

“OK?”

“…yes mom.”

“Good! Now, I want you to open up your diaper, but don’t do anything else, just let it fall open. Now I’m going to take off my diaper…”

Flurry Heart paused for a second but decided waiting any longer was journeying into dangerous territory and hurried to pull off the four tapes on the front of her diaper with her horn. Cadance meanwhile did the same, but unlike her daughter she stood up and moved her soaked diaper off to the side and out of the way.

Doing so of course let her large pink shaft bob free of its wet confines and glisten in the dim light.

“Why don’t we brighten things up a bit in here?” Cadance asked the room in general as her horn glowed and the curtains flew open all the way suddenly illuminating the room well beyond what it had been.

“There that’s better! So, Flurry, it’s time for your first present, one that I think will go nicely with the rest of what’s already in your diaper.”

Cadance crouched down over her daughter in just the right way so that her anus was positioned over Flurry’s crotch and the head of her shaft bumped against her daughter’s muzzle, as she had raised herself up on her forelegs.

Ok, now you know what to do with my penis don’t you? It’ll help me give you your present if you make me feel good.

Flurry Heart seemed eager as she took Cadance’s head in her mouth and began sucking, bobbing forward and back, neither seeming to notice or care about the taste of pee.

“Mmmm… ahh yes, that’s just right Flurry! Mommy loves how good you’ve gotten at this!”

Though her Flurry’s mouth was so full, Cadance could still understand her daughter’s smile of pure happiness.

“I think you deserve your first birthday present from me now, so here you are.” Cadance said with a sigh as she finally released her hold on the contents of her butt, and with great relief felt a warm gooey stream of light brown poop plop down onto and around Flurry Heart’s young slit, already well coated with her own mess from her time in her diaper.

Cadance groaned in relief as her bowels finally emptied themselves over her lovely daughter, bringing a grin of delight to the filly’s face.

“Oh goodness, that makes me feel so much better!” Cadance said lowering herself down on her butt, her penis pulling back from her daughter’s mouth with a soft pop.

“But now it’s time for your next present. Have any idea just what that might be?”

“Uh no, and mom, your poop really smells bad!”

“Hilarious, and yours’s doesn’t? Cadance deadpanned.

“Nope! Not at all.” Flurry retorted shaking her head vigorously, but unable to keep from smiling as she did so.

“I see. Well I don’t care how bad it smells, it’s still very useful and will help both of us feel very good. Now we’d better get started before it cools off.”

“Get what started?” Flurry asked, while laying her head back down.

“Something like this…” Cadance replied pressing her long slick shaft into the slowly sagging mound of warm poop sliding down to completely cover an already dirtied thin light pink slit.

Cadance groaned again while gathering up a large portion of her own poop in a magical field and sliding her penis through the center of the floating mass, coating it from tip to base in slimy soft and so very warm, scat.

Next, she pressed the hovering blob against the entrance to Flurry’s most intimate place and pressed it against her daughter with some force making sure it squished into every little pink fold and between every hair of her fur, mixing it with the liberal coating of Flurry’s own poop already present.

Cadance enjoyed the act of defiling her own daughter so much and was pleased to see that there was now such a thick coating of poop between the filly’s legs that, had she not known better, she wouldn’t have been able to tell there was any fur under there at all, let alone what color it might have been.

‘Ok, here we go, hope this works…’ Cadance thought to herself as she placed the tip of her poop smeared shaft against where Flurry Heart’s pussy was buried.

Pressing forward she felt the head of her penis squish through the warm layer of poop and begin to spread apart the small hidden pussy lips while pushing a wave of more poop in front of it, and into the soft wet passage that was being slowly opened up in response to such an intrusion.

Flurry Heart gasped, then grinned.

“Mom, you’re really gonna fuck me today?”

“I hope so, I think you’re old enough to take me inside of you, but we need to be slow and gentle about it. And why I wanted lots of fresh poop to work with, so we’d have plenty of lubrication for you.”

“I know I’m old enough! And Twilight said we can accomplish anything if we work together.”

Cadance just laughed, and silently thanked Twilight for her advice.

Slowly sliding herself into her daughter, Cadance took great care to be slow and methodical about it, stopping every centimeter or so to insure Flurry Heart felt fine at each stage.

She must have felt more than fine though as she soon had her hooves pressed against Cadance’s hard penis and was attempting to thrust her hips upward, hoping to force Cadance inside her all the faster.

“C’mon mom, you can go faster than that! I’m not delicate you know!”

“Maybe not, but you feel that way to me still, you’ll understand when you have fillies of your own.”

Flurry Heart just sighed and managed to look annoyed yet stimulated at the same time.

Her daughter gave a small gasp and groaned

“I don’t think you can go any further!” Flurry Heart said twisting about on the plastic bed sheets.

Cadance agreed, she felt her head come to an abrupt stop against a warm barrier deep inside her daughter, though still fully half of her penis was still outside of Flurry Heart. Suppressing a sigh, the filly’s 11, what did you expect, Cadance paused then drew herself out and then back in again, rather more swiftly. While her penis was compressed on all sides by Flurry’s very tight insides, it glided along easily thanks to its liberal coating of smeared scat, more and more of which was being taken deep inside Flurry Heart’s young body with each successively faster thrust.

The problem, Cadance had long ago realized, with having sex while using poop as a lubricant is that once you start, regular sex never feels as good again, or as naughty, which is effectively the same thing really.

Despite only being able to fit herself half-way into Flurry Heart, Cadance had never felt better, perhaps because this was one of those rare occasions when she felt true unconditional love for her partner, in a way few others could come close to, let alone match.

Flurry for her sake seemed to be in the process of separating her soul from her body due to sheer pleasure. Gasping and groaning and twisting about she practically writhed, forcing her hips upward in a futile attempt to force her mom in even further than it was possible for her to get.

“Fuck me mom! Fuck me harder! Please! Please!”

“I’m going to fuck you right, Flurry, but not enough to hurt.”

“Uuuhhhhggggg!!” Came the reply to that.

But Cadance had to admit that she really did have to cum soon, or she might get carried away herself, and such inappropriate behavior with her darling daughter would never do.

Turning her head to the side Cadance almost yelled.

“Sweetie! Come here!”

Sweetie Belle, who had been quiet this whole time except for the various wet sounds coming from between her back legs as she furiously hoofed herself, jerked upright.

“Wha-?”

“Come here, I didn’t say you could spend all day fucking yourself at our expense!” Cadance growled

“I- yes princess!” Sweetie Belle yelped, hurrying over to the bed while Cadance continued her smooth inexecrable fucking of her daughter.

“Now, get up here and sit on her face, and make sure her horn fits right up in your pretty little slit.”

Sweetie Belle stared for a second at Cadance wanting to make sure this wasn’t a joke, though under the present circumstances she couldn’t really believe it was one.

“Get!” Yelled Cadance.

Sweetie Belle got.

Quickly situating herself directly over Flurry Heart, Sweetie Belle used her back legs to hold Flurry’s head still as she lowered herself down onto the ecstatic filly. Covering her head and neck with the vinyl skirt she had never gotten around to taking off.

Cadance could read Sweetie Belle’s body well enough to know the instant her daughter’s hard and smooth white horn made its way up into the sensitive insides of Sweetie Belle. The mare stiffened and arched her back while moving her butt around in a small circle to increase stimulation, dragging the filly’s head around with it.

“Ok, now Sweetie, start humping!”

As soon as Sweetie Belle obeyed, Cadance, now confidant that she knew what her daughter could and could not take, doubled her speed of penetration.

Cadance began counting to herself as soon as Flurry Heart, her face hidden under Sweetie Belle’s skirt, started to whimper.

“1…2…3…”

The whimpers became a low growl, very un-childlike at that.

“4…5…6…7…”

The growl increased in pitch until it resembled the sound from a train that had just applied its emergency breaks as heard from about a meter away.

“8…9…”

Before 10 could be reached, the screech cut off into a gurgling choking sound as Cadance finally exploded inside of her daughter with a scream of her own, forcing a marbled mixture of white cum and brown scat to spurt out around where her shaft entered her daughter’s body. Flurry Heart’s back arched up off the bed. There was a blinding flash of radiance, gone before Cadance could blink, which seemed for an instant to render Sweetie Belle’s lower body translucent, except for the darker shadows of various bones, as though she was composed of smoked glass, at which point the whole room began to tremble and sway slightly before subsiding back into stillness.

As the quartz crystals in the chandelier hanging from the center of the celling continued to softly tinkle together Sweetie Belle slumped to the side with a groan, her head and mane drooping over the edge of the bed. Cadance sagged forwards, breathing hard until she was nose to nose with Flurry Heart. Not one to pass up an opportunity for intimacy, Cadance pressed her mouth against her daughter’s and forced her tongue between Flurry’s teeth.

Flurry Heart made no complaints, and their tongues battled for supremacy for a few minutes before they parted, panting.

“So, what did you think?” Asked Cadance as she gently pushed a few strands of sweaty violet mane from Flurry’s eyes.

“I think I wanna do that again!” Flurry heart croaked, sounding like she had a cold, or at least a need for a glass of water or three.

“Hmmm, well, if we do, we’ll need to find a replacement for poor Sweetie Belle.” Cadance said glancing to the side as the white mare gave a twitch and another groan.

“Maybe we ought to do something before she throws up on the rug…”

“I’m alright… just give me a… a second.” Came a whispered response from Sweetie.

“Sorry about that, I know that horn play can have difficult consequences sometimes, but I didn’t expect such release from a filly. Well perhaps I shouldn’t be all that surprised, her being an alicorn and all.” Cadance replied glancing back down at her daughter.

“Well, I hope that satisfies you for the moment crazy girl. We have lots more activities considering what day this is, so we can’t just stay in bed.”

“We can’t?” Asked Flurry with apparent genuine seriousness.

“You’re 11, not 1,100 so don’t act like an old lady.” Cadance deadpanned.

“Now, this diaper your laying on still seems fine to me, it’s full of both our poop but is only leaking a little, well ok, more than a little, but I think it’ll be fine for the rest of the day even so. Here, let’s get you back in it.

Flurry Heart sighed with renewed pleasure as the extra thick disposable diaper and its squishy load was once again taped tightly around her young body. Her mom’s squishy poop and cum swirling and mixing with her own runnier contribution all throughout the diaper’s inside surfaces.

“That’s my baby, I’m so happy you found such joy in your diaper just like I did at your age. They really do look so perfect on you, so thick and so full as they are.”

Cadance leaned down and planted a single but firm kiss on the shiny blue plastic front of Flurry Heart’s stained and leaky diaper.

Retrieving her own previously discarded diaper Cadance put herself back in it, though it had grown cool she intended to warm it up with a nice big wetting again soon. It's already tight wet bulk swiftly caused her briefly soft penis to rapidly grow hard again, ready for round two.

“You doing alright Sweetie Belle? Seems you’ve suffered enough for your transgressions.”

“I’ll be ok, I just feel like I came five times in a row then got hit in my pussy with a hammer…”

“Hmm, yes, well it sounds like you’ll come through fine. Cadance replied, feeling some sympathy for the poor mare.

“Someday I’ll teach you ways to fuck an alicorn’s horn with better magical protection, so you don’t feel like your vagina has a massive hangover afterward.”

Sweetie Belle grinned weakly, then threw up, quite noisily, down the side of the bed.

“Well, come on Flurry, let’s find a cute dress or top for you to wear, there are lots of ponies who will want to see you today, after all, we have a birthday to celebrate.”