Sisterly Bonding

Sisterly Bonding
by knails





Warning!!!
This is a fan fiction based on My Little Pony: Friendship is Magic that contains fetish material, specifically geared towards babyfur/ABDL  readers. In addition, this story contains “clop”, a.k.a. masturbation, done by two adult female characters. If this does not sound like something that you would like to read, then please, do not do so, as you will be undoubtedly scarred (or at least generally left unhappy) by the mental images this vividly descriptive text incurs. You have been warned!

Note: MLP:FiM and all related characters © Hasbro/The Hub, Lauren Faust, etc.




	“Here’s a good one!”

	Flitter followed her sister’s voice, pumping her wings harder and harder in an effort to fight gravity and gain altitude. Her muscles strained as she climbed higher and higher, and just when she thought she couldn’t continue any farther, the periwinkle pegasus managed to reach the cloud her twin had indicated. She flew up over the edge and collapsed in a heap, panting from the exertion. She took the pair of flight goggles she had been wearing off, letting them hang around her neck by the strap. At last, she could rest. She was grateful to finally be giving her burning wings a break while laying about the cool, fluffy softness of a high-altitude cloud.

	“What’s the matter, sis, can’t keep up?” Cloud Chaser alighted a short distance away from her sibling, looking not the least bit exerted. She casually removed her own flight goggles, readjusting them so they rested on her forehead. “You know, we’ve only been flying for fifteen minutes. It shouldn’t be that hard to zip around a few clouds.” The spiky-maned mare rolled her eyes while saying the last sentence, stretching her legs as she did so.

	Flitter shot the other pegasus an angry glare, evident annoyance in her heliotrope-colored eyes. “That’s easy for you to say,” she retorted, her words punctuated by her panting. “Most of this was straight, vertical flying. You know I’m better at graceful tricks and acrobatic maneuvers.” Her panting slowed as she regained more and more breath. “That, and short bursts of speed,” she added. “That’s why I’ve got the dragonflies, and you’ve got the comet.” She pointed at their respective cutie marks as she mentioned them.

	“Yeah, yeah, well, we’re here now, so let’s quite yakkin’ and get this party started, eh?” Cloud Chaser turned around and wiggled her rump playfully as she said this. She, like her sister, was wearing a thick, fluffy disposable diaper. The crinkly, plastic-textured garment was primarily pink with four sky blue tapes and matching leakguards. A white cloud pattern dotted the garment all over. It was fairly thick and bulky, yet the leg hole rode rather high, leaving a good deal of the pony’s flank exposed. “I’ve been holding myself for, like, ever, and I’m just dyin’ to let it loose already.”

	Flitter stood up at this. In truth, she was also in urgent need to relieve herself. She had been holding her pee all morning, and since the previous night as well. Her bladder was starting to ache; in fact, it was one of the reasons it had been so hard for her to keep up with Cloud Chaser, even more than the natural disadvantage in flying compared to her sister. Despite her great need, however, the pegasus was still a little reluctant. She looked away and nervously fiddled with the pink bow sitting atop her head. “Uh, y-yeah, I guess so…”

	Cloud Chaser, reading her sister’s body language loud and clear, scowled. “Oh, what, you wanna chicken out now?”

	“Well, it’s just…” Flitter looked around nervously. “What if somepony sees us? We’re up here in the middle of the sky - ”

	“That’s why I picked this cloud,” interrupted Cloud Chaser. “Look how high up we are! Other pegasi don’t usually come up this high, not often.” The light purple pegasus swept her hoof above her in an arc. “Plus, look at all the other clouds up here! There’s so much cover, it’d be a long shot for anyone to actually be able to see anything at all up here, let alone us. And even if they did, we’d probably see them first, so we could quickly hide or something’.”

	“Okay, yeah,” the pegasus’ sister replied, nodding, “but there are pegasi out there that could come up here, theoretically. What if somepony like Rainbow Dash - ”

	“Look, it’s just you and me up here, okay?” Cloud Chaser cut in again, putting a hoof over Flitter’s mouth. “It’s just us. Alone.”

	“Yeah, that’s another thing…” Flitter replied, pulling back from her sister. “It still seems a little…I dunno, weird to be doing this together…”

	Cloud Chaser sighed and rolled her eyes. “Oh, come on, Flitter, we already talked about this. We both like doing this kind of stuff, right? So what’s so bad about doing it together? I mean, we do practically everything else together, ya know? Why should this be any different?”

	“Well, I…”

	“C’mon, this’ll be good sisterly bonding.” Cloud Chaser flashed a grin. “Besides, I wanna see how much more I can do than you.”

	Flitter raised an eyebrow. “Oh, really? You’re so sure you’re gonna beat me that easily, huh?” The sisters’ natural competitiveness had seemed to erase the last traces of doubt and inhibition lingering in her mind.

	“Hey, now that’s the Flitter I know!” Cloud Chaser cheered. “So, you ready to…go now?”

	A loud hiss was the only reply Cloud Chaser got, as her sister simply stood there smirking.

	“Hey, no fair! You can’t start without me, Ms. ‘I-don’t-know-if-I-wanna-do-this-or-not’!” Cloud Chaser wasted no time in spreading her legs, squatting, and relaxing her own bladder. Another hiss joined the other, with both pegasi wetting their diapers simultaneously. “There we go. Cheater.” She stuck her tongue out at her sister, who merely reciprocated the gesture.

	In truth, Flitter was technically having an accident: she hadn’t actually meant to start peeing right then, but she had been holding it for so long, and she was so tired from all of that tough flying, that it had apparently been too much for her strained bladder to handle. Gee, good thing I’m wearing this thing! She thought to herself, still grinning like nothing was wrong. Indeed, playing it cool seemed to be working: her sister looked to be none the wiser about the whole affair.

	Flitter relaxed a bit more and moved herself into a squat. Her stream grew stronger, and her face flushed at the growing sense of relief she felt as more and more pee flowed out of her and into the absorbent padding she was wearing. The rear of the diaper swelled, causing her tush to be swaddled in warm, wet comfort as the bottom of the garment started puffing out as well. She smiled.

	Cloud Chaser was experiencing similar feelings, though she wasn’t quite as far along as her twin due to her late start. As she relieved herself, she bent her head down between her legs to get a better look at what was going on with her diaper. “Hey, sis,” she called out, smirking, “you may have started first, but look at how much I’m doing! I bet-”

	The pegasus had stopped herself when she looked over and noticed the state of her twin’s diaper: the garment was greatly puffed out in the back and bottom, bulging out to a considerable length; the front had almost reached a similar girth. Flitter grinned sheepishly at her sister’s bug-eyed stare.

	“Geez, Flit, how much did you drink? You must be peein’ out, like, a gallon!”

	“Well, I was holding it since dinner last night; plus, I had two cups of coffee this morning…” Flitter replied, looking down at her diaper to see for herself. Her eyes widened. “Wow, that is a lot!” she stated, surprised. Then again, it sure felt like a lot, so that makes sense, the pegasus mused in her head.

	“Aw, mare, I only had the two cups of coffee…” responded Cloud Chaser as she looked back to her own diaper in dismay. By now her stream was slowing, and after a few more seconds the last bit of urine dribbled out of her. “Well, looks like I’m done,” she flatly stated. The back and bottom of her diaper were substantially puffy, though not as much as her sister’s. Most of the front was wet as well, with a small dry patch near the top. Regardless, the garment was warm and squishy against her, and it felt admittedly good.

	“Tee-hee!” giggled Flitter, “Looks like I’m winning by a mile!” Her own stream was fading, and finally stopped, and just in time; her diaper looked as though it had been dipped into a swimming pool, it was so thick and puffed out. From back to front, the entire thing was soaked, though it thankfully hadn’t leaked.

	“Holy crud, that’s gotta be some kind of record, or something,” Cloud Chaser marveled as she examined her twin sister’s thoroughly used diaper. She circled around to the back and poked at it. “It’s so squishy! You, like, totally flooded this thing! I’m jealous.” The spiky-haired mare poked the diaper again, and quickly pulled her hoof back as it met some moisture, which she quickly wiped off on the cloud. “Well, almost jealous.”

	Flitter blushed. “Heh heh…” She quickly changed to a smile. “You know something, sis? I’m glad we did this.”

“Yeah?” the other pony looked up at her sister, who was now grinning.

	“Yeah, cuz I won!” She stuck her tongue out and blew a raspberry. “In your face! Nah nah nah nah nah!”

	“Oh yeah? You think that’s all I’ve got?” Cloud Chaser asked, a mischievous twinkle in her eye. “Get a load of this, then, baby!”	Right where she stood, the tomboyish pegasus spread all four of her legs into a wide stance. Bending her hind legs into a squat, she closed her eyes, lifted her tail, and started pushing, grunting loudly as she did so.

	“Uh, Cloud, are you pooping?” Flitter asked incredulously. She took a step back from her sibling. “Ew, you didn’t say anything about us doing that up here!”

	Amid grunts came the pegasus’ reply: “Hey, it’s part of the territory. Diapers are made to hold this, so I’m gonna get my money’s worth.” A few more seconds of straining and pushing rewarded Cloud Chaser with a muffled fart, followed by a quiet crackle as a fresh batch of horse apples dropped into the seat of her diaper, tenting the garment out with a medium-sized bulge. She panted, resting for a moment. “And ya know what? I wouldn’t complain if you did the same. Like I said, there’s no reason to hide this stuff from each other, since we each do it anyway. Feel free to pop a squat and take a dump yourself.”

	“Gross, no way!” Flitter stuck her tongue out in an exaggerated gag. “I’m not pooping in this thing, it probably feels sticky and grody.” She then scrunched up her nose and waved a wing in front of her face. “Ugh, that smells really bad, Cloud.” She coughed. “What’d you even eat?!”

	The poopy pegasus gave a smug but satisfied grin. “Lessee… I’ve been holding this since Wednesday, so…whatever we ate since then.”

	Flitter’s eyes bugged out. “What? But that was, like, four days ago! How’d you even hold it for that long?”

	Cloud Chaser’s answer to her sister’s question was to scrunch up her face and resume defecating. She let out another grunt, and after only a few more seconds of pushing, she again felt relief as another surge of soft, warm horse apples was pushed into her diaper, smashing up against the first bunch and widening the bulge in the bottom of the mare’s diaper. After another short break, Cloud Chaser continued. Her job was much easier now: as she relaxed her bowels, a warm rush of much softer material quickly squeezed out of her, depositing a bit in the back of her diaper before pushing and flowing into the bottom. Relief swept over the pony as she continued emptying herself, and after going for another minute or so, she finally finished. She smiled a broad smile. Her diaper, now, aside from being warm, wet, and puffy from before, was very squishy in the back and bottom. The garment had a real heft to it now, the hot mess inside causing it to sag a little. And it felt good. “And that,” the pegasus emphasized, “is how you use a diaper,” stating so matter-of-factly.

	Flitter rolled her eyes. “Yuck. That’s disgusting, Cloud Chaser.”

	“Oh, what, and peeing an ocean into your diaper isn’t? C’mon, sis, if you’re fine with that, then you shouldn’t have a problem with this. They’re, like, the same thing.” She poked her diaper for emphasis, and her face faintly reddened as the action pushed the diaper and its contents up against her body.

	“Yeah, whatever. Dream on, but you’re not gonna catch me droppin’ a load in this thing.” Flitter retorted.

	Cloud Chaser, who had been distractedly fiddling with her diaper while her sister talked, straightened up and started to trot to the far side of the cloud, her heavy diaper swaying between her legs as she did. Her wings were fully erect, as if she were about to take off. She wore a distracted look on her face as she mumbled a response to her sister. “Uh, whatever. I’ll be back…”

	“Hey, wait, don’t go!” Flitter cried out, a startled look on her face. “Don’t leave me here all alone like this!” She attempted to trot after her sister, thought he action turned into a waddle due to the sheer bulkiness of her soaked diaper.

	Cloud Chaser scanned the sky, looking from one cloud to the next. “Oh, this really is the only good cloud around here…” she muttered.

	“Uh, what was that?” Flitter asked, confused.

	Her twin whirled around to face her. “Look, I gotta do something, so gimme some space, all right?”

	“Uh, sure…” replied Flitter, taking a few tentative steps backward.

	Cloud Chaser immediately sat down with a squish, her full diaper squashing a bit under her weight. She repositioned herself until she was partly on her back, leaning up against a small mound of cloud. Her tail and hind legs stretched forward, lying out on the ground before her, while her wings were still popped straight out. Her face wearing a faint blush of red, the pegasus widened her hind legs and brought a forehoof over to the bottom of her diaper, where she proceeded to push against the outside of the garment, pressing the wet, messy diaper up against her body. The mare’s blush grew stronger as a soft, involuntary “ooh” escaped her lips. She started slowly rubbing her hoof back and forth over the area, pressing in with each rub.

	Flitter gasped when she realized just what her sister was doing: her face flushed from embarrassment, and she turned away quickly. “C-cloud Chaser! Why would you do that right now? I’m standing right here, for Celestia’s sake!” The flustered pegasus stammered.

	The other mare stopped rubbing and looked up, annoyance evident on her face. “Hey, you’re the one just standing and staring. I said I gotta have some space right now, didn’t I? This is the only really private cloud around here, and I gotta do this now, so…either turn around, or leave, okay?” As Cloud Chaser looked at her sister, a wry smile appeared on her face. “Heh, judging by those wings, you’re dyin’ to do this, too,” she observed.

	Flitter blushed and turned her attention to her open, stiff wings. “What? No, that’s just… I’m not… Um, why would I want to…”

	Cloud Chaser rolled her eyes. “Oh, please, don’t play dumb. We both know full well what we like to do in these things - ” she poked her diaper “ - after we go in them.”  She slowly rubbed the outside of her diaper in a deliberately sensual manner, while giving an exaggeratedly sultry gaze. “C’mon, sis, no use pretendin’ – it’s not like either of us really hides it.”

	The other pegasus was blushing harder than ever now. True, she did like to “clop” in her diapers, and she knew her sister did as well, but she tried not to think about that. There had been a sort of unspoken agreement between the two to not bring said topic up; or at least, it seemed to Flitter like that was the case. Now that Cloud Chaser had so blatantly started talking about it, though, there didn’t really seem any point in hiding it… Still, Flitter wasn’t sure what to say. “Uh, yeah, but…”

	“Come on, you know you wanna,” Cloud Chaser continued. “So why don’t you just go over to that side of the cloud and do your thing, while I say here and do mine. That way, we’re out of each other’s manes, and we can both get relief.”

	Flitter nervously chewed on her forehooves as she thought on the offer for a moment. On one hoof, the prospect of doing that activity with her sister doing the same nearby was just plain awkward. It felt…weird; this wasn’t really an activity she wanted to share with her sister, quite frankly.

On the other hoof, though, there was a tight discomfort in her crotch that was just begging to be addressed…. And really, like Cloud Chaser had said, they’d be on opposite sides of the cloud, paying attention to their own business rather than each others’; technically, they wouldn’t be doing this together, just kind of near each other. That wouldn’t be so bad, right?

	“Y-yeah, I guess that works…” Flitter finally conceded.

	“Good, cuz I’m tired of waiting.” With that, Cloud Chaser moved to resume fiddling with herself.

	“Hey, at least wait ‘til I turn around!” Flitter cried indignantly, before immediately doing just that. She hurriedly made for a small hill on the opposite side of the cloud, her thick, puffy padding slightly swaying with each step.

	As soon as the other pony disappeared from sight, Cloud Chaser quickly resumed what she had started; eager to make up for lost time, she started going harder and faster than she had previously, rubbing her hoof back and forth with vigor until she could find a good rhythm. Almost immediately, the tension that had been mounting inside of her returned, and her face grew warm with passion.

	Suddenly struck with inspiration, Cloud Chaser stopped yet again, this time standing up and scanning the area. Finding what she was searching for, she quickly waddled over to it, and smiled as she arrived. Before her stood a small, unassuming mound of cloud, not much larger than a molehill. It came to a dull point, which the pegasus tested with a hoof: soft yet firm, strongly attached to the ground. Perfect. She licked her lips, positioned herself over the mound, and lowered her bottom onto it.

Cloud Chaser gasped as the little hill had its intended effect: sitting down on it caused it to push the thick, messy diaper swaddling her up against her bottom, with some of the warm, wet padding pushing into her marehood. Her face flushed hot, and she let her tongue hang out of her mouth as she instinctively started humping, grinding herself back and forth against the cloudy hill in a rhythmic manner. Each pass pushed the soft, puffy crotch of her diaper against her tight, moist privates, and the tension just built higher and higher as she went harder and faster.

“C’mon, c’mon!” the horny pony panted out. “So… close.” Cloud Chaser felt like her crotch was on fire with anticipation; it was just burning for release, and she almost had it, she could feel it. She kept humping, repeatedly pushing herself into the padding of the hot, squishy diaper, she wore, until –

All of the built-up tension burst out of the mare at once, her body exploding in release as an electric spark of pleasure arced through her. Cloud Chaser sat down hard on the mound as she came, moaning as she pictured in her mind that cute pegasus from the weather patrol. “Th-Thunderlane!” she cried out, not caring about who heard her. Her face flushed with passion, and her vision blurred as her head swam against the dizzy bliss of her climax.

Eventually Cloud Chaser’s moment of passion ended, and her head cleared, the tingling spark subsiding. “Mare that was awesome!” she exclaimed, her face still a little warm from her little “workout”. She flopped onto her back and sighed in satisfaction.

Meanwhile on the other side of the cloud, Flitter was having her own private time. Moments after leaving her sister, she found herself laying back against a small hill of cloud. Following her sister’s lead, the teal-maned pegasus had stretched out a bit, so that she was partially resting against the feature.

She let out a nervous breath. Though she had put as much distance between herself and her twin sister as possible, she still felt…uneasy. Could she really do this out in the open, with her sibling not too far away? The insistent discomfort in her privates answered the question for her, and she shook her head to clear her mind of any last doubts.

The pegasus stretched her hind legs out, so that the thick, puffy bulk of her soaked diaper rested all of its weight against her marehood. She exhaled sharply at the tingling it brought. Bringing a forehoof down on the outside of the garment, Flitter pressed the squishy padding right up against her tight, tingling privates, and she gasped at this new pleasure that manifested. She pressed again, a little harder this time, and started rubbing: up and down, up and down, back and forth across the crotch of her diaper. The tingling started growing, and a feeling of mounting tension started to build deep inside the mare. She kept rubbing and rubbing, going harder, faster, pushing her stimulated privates more and more against the thick, wet diaper that covered her bottom. Her face started to warm, and the pony panted, the tension growing stronger and stronger as she neared her climax.

Flitter stopped rubbing for a moment. A mischievous smile appeared on her face, and she took her hoof and slipped it into her diaper through a leg hole. She resumed her rubbing, pressing the edge of her hoof up inside of her, moving back and forth rhythmically. The building tension ramped up, the tingling turning into a strong buzz that threatened to explode out any minute. The excited pegasus went faster and faster, and moved her hips, grinding herself against the hoof as she pushed it back against herself. The buzz kept building, the tight tension mounting, until finally, just as she couldn’t take it any longer -

	A rocket of ecstasy shot up from between Flitters’s legs and through her body, as the pegasus finally exploded in climax. She cried out sharply as her privates erupted in pure bliss, and her hoof was splashed with a sudden spray of hot liquid that flowed out of her and into her diaper. “Oh, Blossomforth!” the lusty pony moaned. Her face was burning with passion as she sat back and reveled in the pure pleasure brought by this release. She felt like she was floating on air, like she was way up in the sky, sitting on a cloud…never mind the fact that she actually was.

	Flitter remained lying down as she finally finished, the buzz slowly fading away into nothing more than the slight tingle from before, and then, nothing. The pegasus simply lay there and panted, exhausted yet satisfied.

	Back on the other side of the cloud, Cloud Chaser had drifted off into a light nap. After an imperceptible amount of time, the slumbering pony was suddenly awoken by her sister’s voice.

	“Hey, sis?” Flitter tentatively called from her spot. “Are you…uh, are you done yet?”

	A quick shake of her head, and she was fully awake. “Yeah,” the spiky-haired pony casually replied, “Yeah, I’m done.”

	After a fashion, Flitter popped out from where she had been and flew over to her sister.

	Cloud Chaser looked up at her with a knowing smile. “So, how was it? Didja have fun after all?”

	Flitter, her face enveloped in another blush, looked away. “Uh…” Hesitantly, she turned back to her sister, and gave a timid smile, accompanied by an equally tiny nod. “Yeah.”

	Cloud Chaser smirked. “Me too.” She got up and stretched, her heavy, sticky, and now cold diaper swaying with her every movement. Throwing a look back at the messy garment, she grimaced. “Okay, I could really use a change right about now.”

	The other pegasus giggled and looked to her own wet and clammy padding. “Yeah, same here.” She then turned back to her sister. “Let’s get the hay out of here.”

	“Race ya?” Cloud asked, raising her eyebrows.

	“Uh, I don’t think so,” Flitter flatly replied with a half-lidded stare.

	The two ponies giggled as they took off for home.



* * *

	“Are they gone yet?”

	“I don’t know, let me check.”

	The black pegasus stuck his head out from over the top of the low wall of cloud he was hunched behind, trying to maintain a low profile as he scanned the area. He then turned to his companion. “All clear, Blossomforth!”

	The white mare stood up and stretched her wings. “Sweet Celestia! I thought they’d never leave!” She then looked down at the cloud those other pegasi had been on, and scrunched up her face. “Ugh, what were those two even doing? That was just gross.”
Turning to her companion, she raised an eyebrow. “Ultra-private cloud, huh, Thunderlane?”

	“Hey, come on now, it was ultra-private before - ”

	“Yeah, no, I don’t wanna hear it right now. I’m done with this; that freakshow down there was a major wingboner killer.” Blossomforth spread her wings and took off, disappearing into the sea of clouds as she called over her shoulder, “Later, Lane.”

	Thunderlane sighed. Why did all his dates end this way?