Sunset swung her apartment's front door open, immediately dropping her book bag beside its frame as she passed into her abode. Kicking the door shut behind her, she collapsed forward onto her couch, the exhaustion of another monotonous school day finally settling through her entire body. She laid there for several minutes before deciding to lift herself and shift to sit back properly upon the sofa.

It hadn't been a particularly frustrating day, but the clock seemed to tick so slowly through each class that Sunset felt like someone was using Equestrian magic to manipulate time. None of her other friends seemed to have the same thought, though Twilight assured her that there were days at Crystal Prep that made her feel the exact same way.

Twilight... It was always nice to have someone who really clicked with her here in the human world. While she loved all her friends dearly, none of them really understood her like Twilight did. They shared so many interests and experiences, and it gave Sunset an indescribable amount of pride and joy that she could lift Twilight's spirits in a way that always surprised their other friends.

It probably helped that Sunset had a massive crush on Twilight.

Sunset leaned back into her couch, gently pressing her palm against her abdomen, her fingertips dancing just above her crotch. Normally Sunset wouldn't be so shy about her desire for a closer relationship, but three things made Twilight as her girlfriend seem farther out of reach than anyone else. The first was Twilight's failed relationship with Timber making it clear she was, at the very least, straight. Whether or not she was bi had yet to be seen, so Sunset didn't knock the idea entirely.

The second was that because of that relationship, Sunset had seen first hand how Twilight behaved when she was crushing on someone, and she didn't seem to exhibit similar behavior when interacting with Sunset. That could also be explained, she thought as she hooked her fingers into her jeans and tossed them down to her ankles, as since they were already friends Twilight might behave differently.

At this point Sunset wasn't sure if she was trying to justify to herself why hooking up with Twilight would be a bad idea, or if she was making excuses that it could still work out. As she kicked away her jeans and began rubbing her fingers against her panties, her mind wandered back to the last hurdle she'd have to overcome. She didn't just want to date Twilight, she wanted to share with the nerdy girl her most intimate secrets, her hidden pleasures, and of course fuck her until she passed out in her arms.

Sunset had never wanted to lay herself bare in such a way to anybody else before, and she worried that her... sexual tendencies would push Twilight away. It didn't help that Twilight generally shied away from anything but the most clinical discussion of the topic. Rainbow loved to tease her about it, and while Sunset chastised her athletic friend for it, she couldn't help but admit that seeing Twilight get so flustered was pretty adorable. Just imagining that same cute expression as Sunset made Twilight hers turned her on so much.

Sunset finally decided to kick things up a notch, slowly starting to pull her underwear away as she watched a few strands of her juices cling to the fabric. She stopped as she wondered if she should actually keep them on for what she was doing next; she loved seeing her underwear completely soaked. Making up her mind, she pulled them back up to her waist, tugging on them firmly to briefly press into her pussy lips as she let out a small grunt of satisfaction.

Reaching underneath her sofa, she pulled out a small hidden stash of diapers, plucking one of the crinkly garments from the confines of the package before placing the rest back beneath her. She hurriedly unfolded the diaper and slipped her legs through, already feeling the anticipation building in her crotch; her body had been craving this kind of release all day, and it was done being patient. She pulled the diaper flush against her panties, giving them the same pressuring tug as she had before. The padding was soft but pressed firmly against her swelling pussy lips, her nether regions quivering as her bladder sat just on the edge of release.

Sunset leaned back, sliding her hand underneath the thick padding and prodding her fingers against her damp panties, her heart racing in anticipation of just how soaked they were about to be. Her weakening hold on her bladder finally gave way, her pee gushing against her panties like a fire hose and drenching them within seconds. Her finger went into overdrive, pressing the soaked fabric further against her stream of piss as she felt it seep into the padding of the diaper and pool around her palm.

Sunset went on for several minutes, the small droplets that started leaking from her diaper turning into its own consistent stream as all Sunset had to give became too much for the padding to handle. Not that she cared; she loved when she was able to push past that limit, even if it meant she'd have to get the mop out again. She even recalled the one time she ran out of diapers and decided to see what it would be like to just piss on the floor instead. She still enjoyed diapers better, but it was always nice to know she had backups for pleasure just in case.

What I wouldn't give to watch Twilight do that... Sunset mused, the very fantasy driving her deeper into her sexual euphoria. Though her piss stream had finally died out, her juices continued to leak from her pussy the more she played with it. Her thoughts grew fuzzy, the world slipping away from her perception as she focused solely on the image of Twilight before her. She always imagined Twilight with a much smaller diaper, one that fit her cute nerdy frame. The violet girl's knees were bent inwards, desperately trying to hold back her own release and hide her shame. Go ahead Twilight, let it out. I wanna see it, Sunset spoke in her daydream.

Those few words were enough to convince Twilight to let go. Either that or she just couldn't hold it in anymore; Sunset usually played around with a few ideas in her dreams. Sometimes Twilight's diaper, despite is size, was extremely absorbent, and would quadruple in size just from her piss. Sometimes the diaper was more realistic, giving out after only a few seconds before Twilight's urine seeped through and spilled out onto the floor beneath her. Sunset loved to imagine that Twilight's legs would give out underneath her and she'd sit in the large puddle of piss she created, even as it was still spreading across Sunset's floor.

That last image was enough to drive Sunset over the edge, screaming in ecstasy as her orgasm exploding against her panties, which by now was nothing more than a soggy rag pretending to cover her pussy. Each violent burst sent electric shockwaves throughout her whole body, her pelvis involuntarily thrusting in time with each squirt. Her right hand quivered against her sensitive lips while her left held the cushion behind her in a vice grip. Slowly, she pulled her hand out from her diaper, watching the coating of juices against her palm cling to both her panties and the diaper, splitting away and falling across her shirt.

Using her other hand, she carefully lifted herself form the couch. the weight of her diaper falling between her legs and swinging like a pendulum. That feeling by itself made her weak in the knees, and Sunset made that feeling even worse by pulling the diaper up her waist as far as she could. The diaper's padding once again pressed flush against her crotch, almost jumpstarting her libido once again. Her bladder muscles pulsed, attempting to release even though there was nothing left to let go of. At least, not in front.

Sunset very rarely pushed that far, and thought better of doing it today. Cleaning the pee from her panties was one thing, but it would be much harder to clean anything more from them. She also didn't have the money to afford getting a new set at the moment; most of it was already spent on cleaning up her fetish. She could ask Rarity to make a new pair for her as a favor, but explaining why was something Sunset wasn't too keen on attempting; any fib she could come up with was likely to fall under severe scrutiny.

So Sunset simply waddled her way over to her bathroom, untaping the diaper from her hips and letting it fall from her legs.She started up her shower as she tossed the diaper into the waste bin, disrobing until only her soaked panties were left clinging to her body. She knew her underwear would need to be cleaned as soon as possible, but since they were usually already soaked, it had become a habit of hers to just wear them into the shower and then throw them into her washing machine afterwards.

Stepping into the shower, Sunset thought back to her daydream, and how she could ever be that close to Twilight. A part of her believed it would be best for her to take things slow, establish a normal relationship before bringing Twilight to her apartment one night and explaining her fetish, having a serious discussion with Twilight to understand if she was okay with that and if she's even be into it at all. That plan made perfect, logical sense.

Sunset didn't have the patience for it.

Not only that, but Sunset knew Twilight would be too squeamish to even admit she might want to try it. Twilight was never good about brushing up against what was taboo, again something that Rainbow took great pleasure in teasing her about. No, Sunset couldn't ask Twilight if she thought she might enjoy trying it, she needed to show Twilight that she does enjoy doing it. And hope I'm right. It was a hefty gamble, but Sunset was willing to play the odds. All she needed now was a plan...

Sunset paced back and forth in her apartment's living room, now more nervous than she has ever been. About a week had passed since Sunset settled on her plan to get with Twilight, and the nerdy girl had agreed to come by and hang out that afternoon. Sunset was pretty confident in her idea, but pulling it off was also what she was afraid of. She knew the moment she convinced Twilight to even try Sunset's idea, she wouldn't be able to contain herself and her true motive would be given away in an instant. Sunset could only hope that Twilight would be on board for whatever came next.

A soft knock on her door snapped her out of her musings, and she rushed over to open it for her guest. The door revealed Twilight, already blushing a light shade of red as she clung a couple of books to her chest. "Hey, Twi. You alright?"

"Huh? Oh, yeah, I'm fine, just had a little run-in with Rainbow on my here, no big deal." Twilight hurriedly replied as she squeezed past Sunset into the apartment, seemingly wanting to get out of the public eye as quickly as possible.

"Let me guess, she wanted to know if you were ready for your 'date' with me today, right?" Sunset asked dryly. Ever since Rainbow started dating Fluttershy, she was pretty adamant on the rest of her friends hooking up as well, and according to her the pairings were pretty obvious. Sunset couldn't really argue the point; it was pretty obvious that Applejack and Rarity were functionally girlfriends already, and Sunset was crushing on Twilight hard. Poor Twilight was the only one who couldn't understand where Rainbow got any of this from, and that made her Rainbow's favorite to tease about it.

Even Sunset mentioning it in a sarcastic way set Twilight's cheeks ablaze. "Wha, a date? I don't know anything about a date! Was this supposed to be a date? Was I supposed to bring flowers? I'm not really dressed that well for anything..."

"Relax Twilight, I'm only joking," Sunset replied, though Twilight's response did somewhat throw her off. Did Twilight actually consider the possibility that Sunset was asking her out? Guess I'm gonna show my first card a little earlier than I thought. "You don't sound too opposed to the idea though."

More blushing. "I, well, I mean, I guess if you wanted to, I mean, you are like one of the most popular girls in school and one of my best friends and, um... other things, but I don't think you'd want to do that anyways, you probably have so many other options."

Other things, huh? Sunset stepped up to Twilight, mentally noting that she might actually have to thank Rainbow later. This was definitely not how she expected this to go, but something was definitely under Twilight's skin about this; maybe she wasn't letting on just how much Rainbow said. "What if I didn't want any of those other options?"

Twilight grew even more nervous, the gears in her head turning until they finally clicked together... to the wrong conclusion. "Oh, I'm sorry, I guess it was a little presumptuous of me to assume you had any interest in romance, my bad."

Sunset was about to correct her by pointing out her dating Flash Sentry, but ultimately decided that was a poor example. So she settled on doing what she does best. "Guess I have to be a little more direct then," she stated before leaning in and quickly kissing Twilight's lips. This left Twilight frozen in place, her face growing cartoonishly red as she struggled to process Sunset's brazen gesture.

Sunset, on the other hand, was desperately fighting the urge to push her luck and finally indulge her fantasy, but she knew it was too soon. If she started now , there was no way she was going to get everything she really wanted; there was still more to set up before she got her true payoff. So she took a seat on her couch and waited for Twilight's response, though remembering what was currently sitting under her couch didn't do her any favors.

A few minutes passed, yet Twilight remained in place, her only movement being her fidgeting with her skirt. She couldn't think of anything to say, and though some part of her told her she should excuse herself and try to face Sunset about this another time, she also didn't want to leave Sunset in the dark and make her think that she hated her or something like that. She'd open her mouth to try and say something, but either the words wouldn't come out or she just thought better of what she wanted to say and kept it to herself.

Sunset realized she was going to have to be the one to bring the situation back down. "So, was there anything you wanted to do?" she asked, trying to get things back on track and show Twilight that the kiss was something rather banal to her. "I see you brought a couple of books with you. Something new you wanted to show me?"

"Oh, um... yeah, I mean, I guess. Um, before that," she stuttered, shuffling over to the coffee table to set the books down. Sunset could hear her mumbling something to herself, though she couldn't really make out much more than 'keep it together'. Before Sunset could ponder on it anymore, Twilight turned back to her and asked "Would it be okay if I used your bathroom?"

A lump jumped up Sunset's throat; this was all moving far faster than she had expected, but she couldn't falter just because of that. Now was the time to set the second part of her plan into motion. "Um, about that, something went wrong with my plumbing sometime yesterday. The landlord said he'd get someone to come have a look at it soon."

"Oh, that shouldn't be too much of a problem, I'm sure you and I could fix it up ourselves. Do you have a toolkit somewhere?"

Twilight, you are too predictable sometimes. "I wish I could fix it myself, but part of my contract says that I can't make any changes to the utilities of the apartment. If I do, it'd void my lease and I'd be kicked out." Sunset could hear the slight frustration in her own voice; she wasn't lying about that fact, and it honestly did make living in the apartment annoying when her power went out and she couldn't do anything about it. Silver lining, Sunset. It'll help you pull this off. Hopefully.

Twilight eyebrows peaked in curiosity. "So what bathroom have you been using in the meantime?"

Almost there. "Well, usually the public ones when I'm outside. Here though... okay, I know this is going to sound really weird, but it's not all than uncommon for Equestrians to still use diapers in their adult years."

Sunset could swear she could see steam pouring from Twilight's ears. "So... you mean you... you have..." Sunset pulled one of her diapers loose from beneath the couch, unfolding it and showing it off to Twilight. "Oh, wow.. you do...*gulp*"

Sunset paid very close attention to Twilight's body language, hoping to understand the feelings that Twilight was too nervous to actually speak aloud. She couldn't tell what Twilight actually thought of Sunset's revelation, but she could tell one thing: Twilight wasn't just trying to get away when she said she needed the bathroom. The poor girl's knees were trembling, and clearly the anxiety of the situation was making it even harder for her to hold it in.

Now all Sunset needed to do was pace her responses. She knew even if Twilight caved and asked to borrow one to relieve herself, it was going to be quite a struggle to convince her to do it with an audience. Sunset needed to wait until Twilight was right on the edge.

"Honestly, I wasn't expecting to find some I actually liked here," Sunset explained, once again doing her best to present this as a normal thing for her. " I had a hard time finding someplace that sold ones that would actually fit. I didn't read the size of my first batch, and bought some that were way too small for me." Sunset quickly eyed Twilight before continuing, "Those were more likely to fit someone of your size."

"Oh, really?" Twilight squeaked out. She was getting close to her limit, and now that Sunset had further planted the option in her head, all that was left to do was to stall for a little while longer.

"Even when I did find ones that fit, they were kinda... boring, you know? I mean, I get that nobody else is usually going to be looking at it, but still, plain gray or white just doesn't really suit me, you know?"

Twilight's mind was racing a mile a minute. She was expecting just a casual visit with her friend, but not only did Sunset confess to wanting to date her, but Sunset also confessed to using diapers whenever a toilet wasn't available. Twilight would be interested to dive deeper into the cultural differences that would've made that seem more palatable to the Equestrians, if not for the fact that she was pretty sure Sunset had caught on to one of her worst nervous habits. Sever anxiety had a habit of completely kneecapping Twilight's bladder control, and all this talk of going to the bathroom was making it even worse.

Sunset's heart was racing just as quickly. While she wouldn't mind just waiting until Twilight couldn't hold herself anymore and just pissed herself right in front of her, she knew that if this didn't go the way she hoped, this would be her only chance to see Twilight like this, and she wanted the most out of it. She just had to draw it out a little bit longer.

"You okay, Twilight?" she asked with concern, standing back up and going up to Twilight. "You don't look so good."

"I- I'll be fine. Nothing to worry about." Twilight lied. She could feel her bladder muscles start to weaken, trying in vain to fight her will to keep the floodgates shut.

Now. "Do you need to borrow one of my diapers?" Just asking that question sent a chill down Sunset's spine.

Twilight clearly hesitated for a moment before nodding, deciding it was far less embarrassing to wear a diaper in front of her friend than it was to pee herself in her friend's apartment. She could barely see Sunset pull something from under the couch out of the corner of her eye, then come back with a diaper significantly smaller than the one she had originally shown. Though rather than handing it to Twilight to go put on, Sunset did something rather... unexpected.

"Sunset??" Twilight gasped as her best friend knelt down in front of her and proceeded to put the diaper on for her. Many things ran through Twilight's head as she watched Sunset wrap the padded plastic around her crotch and over her panties. "Wait, Sunset... my panties!" Twilight could barely string a coherent sentence together, keenly aware of everything wrong with what was transpiring but still too embarrassed to articulate any of it.

Sunset, on the other hand, had completely lost any sense of patience or strategy and was just taking full advantage of the situation to indulge herself, a perverted smile painting her visage as she drank in the sight of Twilight's diaper-clad crotch. Her pussy ached with desire, her mind addled by her fantasy finally becoming reality. The only thing Sunset managed to keep control of was her own bladder; she wasn't releasing that until Twilight had given her what she craved most.

"Mhm, don't worry about it Twi, I'll wash them for you. It wouldn't be the first time I'd have to wash pee out of panties," Sunset assured. Twilight could swear she heard a hint of pride in that statement, but she barely had time to consider it before Sunset began rubbing her thigh, still sitting between Twilight's legs despite the diaper already being fastened to her hips.

"Um, okay Sunset, I should probably go now," Twilight pleaded, hoping to find someplace private to do her business. Maybe she could even get her panties off before her dam burst.

Unfortunately for her, Sunset took her pleas a completely different way. "What's stopping you? Don't mind me, I just want to make sure I have a front row seat to the show," Sunset confessed as she kicked away her boots, laying her head against Twilight's leg and moving her hand to caress the front of her diaper. "Go ahead, Twilight. Let it go."

Just the slight pressure of Sunset's palm pressing into her was enough for Twilight's body to finally give out. She began letting out small spurts of pee, still trying desperately to hold back as her bladder fought for release. Her efforts were in vain as the spurts became a trickling stream, and then a flood. Twilight had to plant her hands on Sunset's shoulders just to keep upright, leaning forward as she could feel her pee soaking every inch of her diaper.

Sunset was loving every second of this, pressing her hand more firmly against Twilight's diaper to feel the vibrations from her pee reverberating through her fingertips. The sight was more wonderful than she could have ever imagined; the diaper was quickly stained a dark yellow, spreading from underneath Twilight's pussy all the way up to the waistband. Sunset could even feel some of it leaking out of the legholes, forking down Twilight's leg and even running down Sunset's cheek.

Twilight had almost given up on trying to stem the flow, but then she heard a sound akin to rain pattering across a roof. Her eyes drifted down to see a puddle forming past Sunset's feet, spilling across her floor and soaking into her socks. It took only a moment for Twilight to realize that her diaper was leaking profusely and she was basically peeing directly onto Sunset's floor anyways. This renewed her attempts to stifle the stream of pee, at the very least holding on to the rest until she got home and could use a bathroom properly.

While Twilight was doing her best to make this end, Sunset was using every trick she knew to squeeze every last drop of urine out of Twilight's bladder. Her hand was now completely soaked in Twilight's piss, squeezing out more from the diaper as she continued to play with the nerdy girl's pussy through the padding. Her knee high socks were now drenched, and she even shifted her legs to allow the dry parts of her socks to soak up even more.

Twilight wasn't sure how much more time had passed before the last drops fell against the wood beneath her; she also wasn't sure at what point her skirt had been tossed aside. All that could she could really focus on was the mess she stood upon, and who else was currently sitting in it. Somehow I don't think even that is normal in Equestria.

"Sunset, I... I'm so so-MMPH!" Twilight began before Sunset jumped from the floor and captured Twilight in a hungry kiss. If she was caught off guard by the quick kiss before, she couldn't make any sense of Sunset's tongue dancing with her own as her lips were sucked and tugged each time Sunset went back in for more. All the rest of the world faded away around her; only Sunset and the puddle beneath them remained.

Sunset was completely lost to her own passion, quickly undressing to nothing more than her own panties before wrapping one of her diapers around her own waist. Twilight attempted to question just what in the world she was doing, but Sunset kept her lips occupied. She even took the opportunity to undress Twilight as well, leaving the violet girl in nothing but her messy diaper. Mhmm, not messy enough just yet.

When she did finally release Twilight, she took a moment to marvel at the beautiful sight in front of her before pushing Twilight to sit back, inevitably causing her to land in her own puddle of pee. Sunset sat in her lap, vigorously rubbing the front of her own diaper. "Fuck, I've waited so long for this," she announced before letting loose her own torrent of pee. Her diaper quickly filled to its max, the excess spraying out of the front onto Twilight's stomach. The sight threw Sunset into a frenzy, reaching one hand down her own diaper and her other down Twilight's, shoving her fingers into each of their pussies and pumping with as much vigor as possible.

Any attempts Twilight made to protest were immediately replaced by moans of pleasure. There was nothing left but the two of them, covered in pee and drowning in taboo pleasure. Twilight couldn't even make any sense of how she felt about it all, the cavalcade of foreign sensations overloading her to the point that she just surrendered herself to the moment.

Sunset could feel a pressure prodding at her anus, and she made no attempt to hold it back. Consequence had flown out the window for her; all that mattered now was that she kept pushing her high higher. She felt the massive shit she'd been holding in for the past few days glide past her anus, stuffing the back of her diaper, pressing it firmly against Twilight's thighs as it continued to expand. She was so close; she just needed one last thing to push her over the edge.

Luckily for her, she didn't even need to ask. Twilight could feel what Sunset was doing, and it made her acutely aware of a similar feeling creeping up on her. Even if she wanted to, she had no strength or resolve to even endeavor to hold it back. She felt her own diaper start to tent out in a similar manner, and try as she might, she couldn't keep herself from shitting in the diaper.

The moment Sunset saw the strain on Twilight's face, she knew what was happening. She shifted just enough so she could watch it happen, and it was enough to throw her into the most electric orgasm she ever had. Her juices gushed from her diaper and painted Twilight's breasts, stomach and crotch. Her fingers quivered violently against her walls and Twilight's, and the sudden vigor was enough to push Twilight over the edge as she let out a high pitched squeal. Twilight had to cling to Sunset just to keep herself upright.

They sat together for several minutes after they each came back down, a discordant silence hanging over them. While Sunset was basking in her afterglow, Twilight was still trying to conclude how she felt about all of this. Here she was, wearing nothing but a diaper that she both pissed and shit in, with her best friend also pissing and shitting in her diaper, sitting in a puddle of both their pee, and she got off to it. How do you even respond to that?

Sunset was the first to finally break that silence. "So... how do you feel?"

Twilight still didn't have an answer, but she could at least give Sunset a hard time while she figured it out. "Your bathroom wasn't busted, was it?"

"Oh, of course not," Sunset admitted as she rose to her feet, uttering a small groan of satisfaction as she once again felt the weight of her diaper drop and swing between her legs. "I'll admit this wasn't exactly how I had envisioned this panning out, but I don't have any room to complain."

Twilight also decided to stand up, carefully trying to find a drier part of the floor to stand on. "...honestly, I'm not really sure how I feel. All of this is so strange and new and... frankly, really weird. I never expected someone to confess to me quite like this."

Sunset thought for a moment and replied, "Well, we could always... run another experiment. We might be able to obtain some more conclusive results."

Twilight couldn't help but giggle at the phrasing, even though she knew exactly what Sunset was suggesting. As strange as it all was, she couldn't say for a fact that she didn't like it. Sunset clearly enjoyed this, and enjoyed having Twilight join her. Perhaps there was an appeal that Twilight couldn't see just yet, but maybe would show itself with more time.

"You know what? I think a rerun would be just fine."

Author's Note

Wow this chapter ran a lot longer than I had initially expected. I was originally planning on a chapter for Trixie/Starlight next, but I think I'm going to do one solely dedicated to Trixie first. This will lead into a special chapter featuring Twilight, Moondancer, Sunset and Trixie all sharing their experiences and pushing the limits of how they can each enjoy the niche each of them explored. Other than that, feel free to leave some suggestions for chapters below!