Living Nightmare

Luna had a problem.

Not the ‘she’d been kidnapped by Nightmare Moon problem and was in desperate need of a rescue’ problem, though that particular issue was still pretty big.

No, Luna’s current problem was a new one: she desperately needed to go to the bathroom.

Her bowels tightened as she squirmed in her play pen. She bit down on her pacifier, but that proved to be a fruitless distraction. It really didn’t help that her rear still stung from the brutal pounding of Nightmare’s hooves. The pain made her constantly focus on her butt, which wasn’t where her attention should be when needing to use the restroom.

Desperate, Luna tried to entertain herself in the lonely nursery while she waited for Nightmare to return. She chucked blocks at the walls of her playpen, to no effect. She suckled and crossed her legs, holding back her need to use the bathroom with all of her concentration, but that failed to make the miserable seconds tick by any faster.

Luna even picked up the rattle and gave it a good shake. Then threw it away when it failed to entertain her.

Finally, after what felt like hours, the door to the nursery opened. For a brief second, Luna hoped for rescuers to have found her, but as a sinister fog spilled in, she knew that wasn’t the case at all.

Nightmare Moon sauntered into the nursery, a cocky grin of preemptive victory on her face. Luna instinctively cowered in the corner of her play pen at the sight of her.

As the door shut behind the dark alicorn, she turned to Luna. “Aww, such a well-behaved filly. Look! You even kept your paci in while I was gone. Good girl!”

The praise for such a mundane, yet humiliating thing only made Luna blush. The top of the play pen suddenly swung open, and magic enveloped her. She was lifted out, barely remembering to clench as she drifted into the air. Her padding’s pristine nature was narrowly saved.

“N-- M-Mommy?” Luna asked. The curious glare shot her way carried an air of menace. Luna suckled nervously for a few seconds. “I… I hafta woose da baffwoom.”

Nightmare’s grin turned ear-splitting, and Luna swore she could hear a split second snicker. “D’aww, that’s adorable. Why don’t you just use your diaper, Lulu?”

Luna’s face burned. “C-Can’t I woose da potty?” She tightly shut her eyelids, too embarrassed to meet Nightmare’s gaze. Her bowels gurgled in protest, desperate for release, but she held them back. She was not using a diaper today.

“Isn’t that just precious. You want to start potty training already, sweetie?”

If it means I don’t have to poop myself… “Yes.”

“Well of course you can.”

Luna’s eyes popped open. The fact that Nightmare was willing to do this floored her. Was she actually going to be allowed to use the toil--

The fog right below her suddenly condensed, forming the shape of a pink, plastic training potty. Luna found herself too shocked for words as she was lowered onto it, her diapered rear crinkling as it came to rest.

“This will be good practice,” Nightmare said with a spiteful smile. “Whenever you’re ready, dearie.”

Denial hit Luna first, but she was quick to realize this was, in fact, happening. Of course. I shouldn’t have expected her to be reasonable.

But some small, desperate part of her still did. “C-Can’t I woose a weal potty?”

“Ohohoho, no.” Nightmare playfully waved her hoof. “You’re not ready for a real potty sweetie. Now go on, just go poopie.”

Tears welled up in Luna’s eyes. Everything before had been humiliating, but this felt like she was outright being robbed of her adulthood. “I… I no wanna!” she cried.

Nightmare feigned obliviousness, cocking her head slightly. “Do you not need to go anymore?” She leaned in. “Maybe you already went ahead and used your diaper?”

Luna’s ears flopped down. She couldn’t believe this. “N-No! I jus’ wanna woose a weal potty!” She thrashed, ready to throw a tantrum just like a real filly. This day had seen to some of the worst moments of her life, hooves down. She would not pile onto that by messing herself at Nightmare’s command.

“Maybe I should check you, just in case.” Nightmare lifted her away from the potty, letting it dissolve back into fog.

“Wha?” Luna couldn’t get out more than that, before she was whipped around, rear facing Nightmare. Not even a second later, and a hoof sank into her padded bottom. “Eep!”

She nearly dropped her pacifier in shock. In fact, she nearly lost her bowel control, too. Only by a faint shred of luck did she manage to hold on as her intimate areas were invaded.

Nightmare’s hoof explored Luna’s diaper, pressing down firmly in a few spot and letting the comfy padding flood each region of Luna’s inner thighs. Eventually, the hoof retracted for good.

“Well, you’re all clean.” Nightmare swiveled Luna back around. “But I guess you’re just not ready for potty training yet.”

Luna frowned, crossing her legs. The pressure building up in her bowels was getting hard to bear. Should she just go? No. Giving Nightmare the satisfaction would be terrible. She would just hold it until she was rescued.

Surely her sister was close to rescuing her, right?

“Anyway, we’ve got quite the day ahead of us. Is my little filly ready for our trip to Ponyville?”

Luna’s eyes widened. Ponyville! Didn’t Nightmare say she was doing some setup before they went out? What had it been? Were the citizens there okay? Was Princess Twilight and her court alright?

Before any answers could come, she found herself dropped to the ground. Nightmare turned, pointing her body to the closet. “Now, I’ll just need to pick out your outfit. Don’t go anywhere.”

As if to mock her, Nightmare had her fog form a chain around her hoof, binding her to the floor. Luna whined behind her pacifier. As Nightmare walked over to the closet, she tugged at the chain, causing it to clink in resistance. She tapped it with a bootie’d hoof, and felt how strong it was. It was blatant that she wasn’t escaping with this thing on.

Still struggling to hold her bowels back, Luna couldn’t help but worry. What had Nightmare done to Ponyville? What were they going to do when they got there? Could it possibly be worse than this?

Needing all the comfort she could get, Luna suckled her pacifier. It was easy, and rhythmic at this point. Almost natural in fact. She shifted in her diaper to get comfortable and let out a slow sigh as her lips bobbed back and forth.

“Aha!” Nightmare peeked around the corner of the closet. “I’ve found the perfect dress for you.”

Luna frowned as her brief respite ended. Nightmare’s magic returned as the chain keeping her down vanished. Luna was pulled across the room, only slamming to a stop right before Nightmare. Her hair whipped in front of her face before she’d even realized what had happened or even processed the familiar sinister grin of Nightmare.

By the time she had the sense to be scared again, Nightmare produced the next instrument of her torture. A violently pink dress appeared before her, assaulting her eyes with the bright, girly color.

Frills poked out from underneath the hem, teasing petticoats underneath. Lacey ribbons ran around the edge as well. Ruffles covered the skirt, and even part of the chest, though they were separated by a sash that culminated in a giant, magenta bow on the back. The puffed sleeves had matching bows on the sides, and the collar had enough frills to choke her to death.

Luna gulped. She could tell by the size of the skirt that it wouldn’t even come close to covering up her diaper. That meant it would just heap on humiliation rather than cover it up. “Uh… d-do I haff ta weawr dat?”

“Of course you don’t have to wear it,” Nightmare said. Luna was just about to breath a sigh of relief when all of a sudden: “You get to wear it!”

The dress crept towards Luna, as if stalking it’s prey. Luna couldn’t help but whimper. I really need to stop believing Nightmare might actually be reasonable for once.

The incarnation of girliness slipped over Luna’s head. She thrash and wiggled in protest, but Nightmare held her firmly in place.

As the petticoats brushed past Luna’s face and her forelegs were forced through the sleeves, she struggled to hold back her bowels. She wouldn’t be able to avoid using her diaper for much longer, but there was no way she would give in now.

Once the dress was on, Nightmare released her magical hold. Luna fell to the ground, her diaper cushioning her fall with a loud crinkle. She winced, still holding it in.

Nightmare hummed softly to herself as two pink ribbons floated out of the closet next. Luna shuddered as they moved towards her. Clumps of her hair were suddenly grabbed, and pulled to the side of her head. The ribbons tied tightly around them, fastening into large bows as they doomed Luna to the cutesy side-ponytail style of the foal.

“Now then, since we’re going out, do you wanna ride in a stroller, sweetie?” Nightmare asked. She towered over Luna with a dainty smile that hid her dark intentions perfectly.

Luna’s ears flopped down. “N-No, I can wawk on my own!” She wished her voice wouldn’t crack so much.

“Well isn’t that just precious.” The sadism returned to Nightmare’s smile. “Alright, sweetie. But let’s make sure you don’t accidentally wander off. Wouldn’t want my silly filly getting lost in the forest, would we?”

Before Luna could reply, the fog below them wafted up. It wrapped around Luna’s neck, and formed a line all the way to Nightmare’s hoof before condensing into a baby blue collar and leash combo.

Luna’s face flushed, realizing that Nightmare had planned out a way to embarrass her no matter what option she’d picked. Looking down at the latest addition to her humiliating wardrobe, Luna saw a shiny dog tag in the shape of a cresent moon dangling from her throat.

Now, her face burned and only partly with anger. Did Nightmare think she was some kind of pet?

Luna reached up and tried to rip off her collar. Sadly, her bootie was being less than cooperative. She failed to get a good grip and found her hoof slipping off when she tried.

Nightmare tsked, switching to her condescendingly motherly tone. “Now, now, Lulu. You were the one who wanted to walk, so don’t get all fussy-wussy about your leash.”

Luna frowned and stood up, trying to get as eye-level with Nightmare as possible, even if she was still a head shorter. “I no needa weash! Imma fuww gwown mawe!” She stamped her hoof angrily.

Suddenly, the room felt twenty degrees cooler. Luna stiffened as Nightmare fixed her with an icy glare. Through narrowed eyes and clenched teeth, Nightmare commanded Luna’s obedience with just one look.

Lowering her head, Luna immediately slipped back into the vulnerable filly role she’d been inhabiting that day, an easy feat given her diaper, dress, and collar all coming together to put her under control.

Nightmare slowly circle around Luna, stopping at her backside. Luna gulped, fearing a new round of spanking for her outburst.

A spark of magic grabbed the waist of her diaper. But instead of lowering it down to expose Luna’s plot, it dragged the diaper up.

Luna’s eyes bulged as she struggled to keep control of her bowels. Her diaper pulled up, giving her a wedgie in the process. Nightmare didn’t let up, pulling the diaper up higher and higher to the point of it being painful. The bottom of the diaper was pulled slowly up, revealing Luna’s cheeks.

Luna whimpered pitifully behind her pacifier as her hind legs were lifted into the air from the force of her diaper wedgie. Nightmare finally stopped pulling on the garment when it reached the point where it couldn't possibly go any further without breaking.

A cold hoof was placed firmly on Luna’s exposed plot. “Now,” Nightmare said sternly. “Do I need to punish my filly for her outburst?”

“N-No Mommy!” Luna cried, fighting back tears, the pain, and the urge to poop. “I undastand! I’ww be a good giwl! I pwomise!”

“Will you?” Nightmare patted Luna’s bottom, enjoying her total control. “Because I’m not sure you’ve learned your lesson.”

“I haff! I pwomise ta do anyding woo say!” Luna wanted to cry. The only thing stopping her was the tiny, tiny shred of dignity she had left. Nightmare had taken so much from her in such a short amount of time; giving her the satisfaction of bringing Luna to tears just from sheer intimidation would be too much.

“Anything?” Nightmare flicked her magic, bouncing Luna’s diaper that sent a ripple through her wedgie.

“Anyding!” Luna cried.

Nightmare stalked around to Luna’s front, keeping the magical wedgie firmly in place. She lowered her head to be eye level with the defeated Princess, eyes cold and unforgiving.

“Repeat after me,” Nightmare demanded. “I’m a good filly.”

“Imma good fiwwy,” Luna miserably repeated.

Nightmare nodded. “I love my Mommy.”

Luna sniffled, the pain almost too much. “I wuv my Mommy.”

“I will obey my Mommy,” Nightmare said.

“I wiww obey my Mommy.” She was pathetic.

The magic holding Luna’s diaper yanked upward, and she yelped, nearly losing control of her bowels. “I want you to say that, over and over again, on our trip to Ponyville,” Nightmare told her. “If you stop without permission, you won’t be forgiven. Understand?”

Luna nodded. She was so pathetic.

Nightmare’s telekinesis finally cut out, letting Luna’s butt have some relief. Her hooves hit the ground and she returned to clenching as much as she could.

Nightmare tugged at the leash, nudging Luna forward. “Alright, sweetie. Begin.”

“Imma good fiwwy,” Luna mumbled.

“Louder.”

She flinched. “I-Imma good fiwwy. I wuv my Mommy. I wiww obey my Mommy!”

Nightmare nodded, satisfied enough. “Let’s go.”

“Imma good fiwwy.” As Nightmare walked out of the room, the leash was pulled tight and Luna was forced to keep up. “I wuv my Mommy.” Her massive diaper still pushed her legs apart, forcing her to put up with it as she walked. Nightmare didn’t slow down for her benefit either, and Luna had to waddle swiftly just to keep from being dragged along. “I wiww obey my Mommy.”

As they moved to the castle at large, Luna found the are dim and dark. She looked up through the collapsed roof and saw the moon hanging high in the night sky. “Imma good fiwwy.”

Was it nighttime already? Surely Luna didn’t spend so much time in the playpen. She wasn’t even that hungry yet, so it couldn’t be passed noon. “I wuv my Mommy.”

Or, had Nightmare eclipsed the sun to make the night last forever? Luna didn’t doubt that the madmare would be bold enough, but she just hoped that would mean Celestia was even more motivated to find her. “I wiww obey my Mommy.”

The took the winding path through the Everfree Forest, Nightmare seemingly tempering her excitement as she slowed down their pace. Luna was grateful that she didn’t have to waddle so fast, but knew that this was just a way of extending the trip to Ponyville. Heck, if Nightmare wanted, they could’ve teleported right to Town Square. Luna almost wished they had so she didn’t have to say this inane mantra over and over.

“Imma good fiwwy. I wuv my Mommy. I wiww obey my Mommy.”

But then again, Luna really didn’t want to go to Ponyville at all. Yes, she was worried for her subjects, for Twilight, for everypony, but the shame that would come from a Princess being seen like this… It would be devastating.

“Imma good fiwwy. I wuv my Mommy. I wiww obey my Mommy.”

Luna struggled to keep her pacifier in her mouth. She knew if she dropped it, Nightmare would be mad. But if she slowed down her chanting, Nightmare would probably be just as angry with her.

She bit down on it as hard as she could and suffered by dropping a few words.

“I a good fiwwy. I wuv Mommy. I obey Mommy.”

Thankfully, Nightmare didn’t retaliate. Maybe she was pleased by Luna sounding even more foalish now.

“I a good fiwwy. I wuv Mommy. I obey Mommy.”

Luna’s ponytails swished in and out of view as she waddled. It made her think about what she must look like. Part of her was glad to remain ignorant, but the other part of her hated the feeling of not knowing what she looked like. She was sure it was probably a monstrously foalish, girlish mix by now, which wasn’t very comforting.

“I a good fiwwy. I wuv Mommy. I obey Mommy.”

She kept clenching, hoping to stop her bowels from spilling out all over her diaper. It wasn’t easy with the constant waddling, but she managed. Somehow.

“I a good fiwwy. I wuv Mommy. I obey Mommy.”

The dense forest eventually lessened, and as Nightmare broke through the last line of trees, Luna was finally able to see what had become of Ponyville.

And she nearly crapped herself just by the sight of it all.

The town’s floor was shrouded in the same fog that Nightmare kept around her, a clear sign that she had already taken over. But that subtle hint wasn’t needed, because every house was now draped in a dark banner that bore Nightmare’s Cutie Mark.

And leading up to the entrance of town where two colorful rows made up of ponies. Even at the distance they were at, Luna could see most had their heads lowered and defeat. Chains bound their legs together. She didn’t doubt that unicorns probably had inhibitor rings on, and pegasi had their wings bound.

Luna could barely speak in shock. “I-I-I a g-good fiwwy--”

“That’s enough for now, dearie,” Nightmare mercifully said. She tugged on the leash again to get Luna moving.

As she waddled forward, Luna could hardly believe the cruelty on display.

Well, this was Nightmare Moon after all. Luna didn’t really have a hard time believing it. She was just shocked to see it all before her. An entire town enslaved… it was something Nightmare had never done before. Just seeing the broken spirits of the citizens of Ponyville was heart wrenching.

Why hasn’t my sister put a stop to this yet? Luna wondered. How could this have gotten so out of control?

They moved closer, and soon ponies started to look up in their direction. As they caught sight of the Princess of the Night, wide-eyed stares, gasps, and jaws hitting the dirt.

Luna’s thoughts were battered away by shame. Her face lit up with shades of pink and red, and she pulled her face left, right and down, as if not looking at the crowd would draw less attention to her.

As they moved in even closer, and started going down the path made by the rows of prisoners, Luna caught a few whispers and murmurs from the ponies around them.

“Is that Princess Luna?”

“Why is she dressed like that?”

“Is that a pacifier?”

“Is that a diaper?”

“What happened to her?”

“How humiliating.”

Luna squeezed her eyes shut, her face on fire. She could hear the faintest snickers from Nightmare, but didn't even care. It felt like she was being buried alive in shame. Her subjects, her little ponies, now knew what Nightmare had done to her.

Luna’s dignity was robbed. Her pride ripped to shreds. Her status as royalty truly meant nothing now. She had allowed this to happen. For Ponyville to be enslaved, and for herself to be diapered like a foal. She’d barely put up a fight!

Embarrassing didn’t even begin to cover how bad this situation was. It was degrading. It was demeaning. It was disgraceful.

And it was made all the worse by Luna somehow feeling that she had earned this.

She suckled her pacifier as she toddled by. It didn’t matter if ponies saw, it didn’t make it any worse, and Luna really needed the comfort.

“P-Princess?”

Oh no… Luna opened her eyes, but barely raised her head. Her eyes made contact with Twilight Sparkle.

Her fellow princess was bound, just like her friends, and made to wait in line too. Looking a little further down the path, Luna saw the rest of Twilight’s court, each looking more broken in spirit than the last.

Some part of Luna had hoped that maybe Twilight would be able to handle this. She'd overcome so much before, right? But then again, Nightmare Moon's return probably surprised her as much as it had Luna.

“I sowwy,” Luna sniffled. Tears were building up behind her eyes again and she couldn’t keep them at bay for long.

“What happened to you?” Twilight croaked out.

Suddenly, the leash yanked Luna forward. “Come along, Lulu,” Nightmare called out.

Luna sniffled and looked down submissively. “Yes, Mommy.” She didn’t look back to see the inevitable shocked face of Twilight Sparkle or her friends.

Finally, they made it to the end of the rows of ponies. Nightmare turned around, but held up her hoof to keep Luna from doing the same.

“What do you think, Lulu?” Nightmare asked. “Isn’t Ponyville just a delightful place now?”

Luna cringed, the pressure in her bowels unbearable now. It felt like they were about to burst. She pushed her legs together, doing everything she could to hold out.

Nightmare chuckled. “Aww, I know that face, sweetie. Does somepony need to go potty again?”

You already know I needed to! “Y-Yes…”

Nightmare smiled sadistically. “Do you need to go peepee or poopie?”

Luna blushed, knowing this question was only meant to humiliate her more. Voice barely a whisper, she answered “P-Poopie…”

Nightmare turned her head, ear facing her. “Speak up, sweetie. I can’t hear you.”

Tears ran down Luna’s face. Using her normal volume, she said, “I need ta go poopie.”

She heard shuffling and murmurs as the ponies nearby heard. Face red, Luna sniffled as more tears rolled down her cheeks.

“I’m sorry, sweetie, but what was that?” Nightmare delighted grin dominated her face. “Why don’t you yell it for me.”

Luna sniffled again. “I GOTTA GO POOPIE!” She yelled, so loudly that the entire town must have heard her.

Scattered surprised yelps echoed from the crowd behind her. Luna’s lower lip quivered, and she started blubbering. Nightmare’s cackles overshadowed all of this.

“Well then, Lulu, go ahead and go poopie.”

Luna sniffled. Her bowels begged for release, but she still fought down the desire.

Nightmare leaned in, motherly tone once again replaced by a villainous one. “Now, now, we mustn’t disappoint everypony. You’ve promised them a show at this point. If you don’t deliver, I can always demonstrate to them how I discipline you.”

Luna sniffled and wailed. Her crying wasn’t a good enough answer though, so instead she spread her legs and raised her plot into the air.

Nightmare stepped back, her threat having worked perfectly. Luna cried, but knew she didn’t have a choice. She bit down on her pacifier and stopped holding back.

The effect was instant. Her bowels leapt at the opportunity and did all the pushing for her. Poop rushed out of Luna and flooded her diaper. The mudslide cause the diaper to shift, crinkle and sag to accommodate the mess.

Luna cried loudly as mush filled her diaper, but no matter how loud she tried to be, she couldn’t escape the sound her mess was making. Or the results of it.

As Luna emptied her breakfast into her diaper, the captured townsponies could only react. She didn’t see them, nor did she want to look, but she heard them. Some gagged, others gasped. There were complaints about the rancid smell, shocked exclamations of disbeliefs, and even a few nervous laughs thrown in.

When the last of the slippery mush spilled into her diaper, Luna felt herself shaking.

That was it. Even if Celestia saved them all now, there was no undoing this damage. Word would spread throughout all of Equestria how the Princess of the Night soiled herself on command. How she wore a diaper and frilly dress. How she suckled on a pacifier. How Nightmare Moon toted her around by a leash.

It would be a story that would persist for centuries, and Luna would have to endure it all. The endless humiliation, both now and in the future, was already piling up. She could feel the sting of shame, worse than any spank Nightmare could give her, burning her very soul.

This was pure, disgraceful, humiliation.

Luna didn’t move, save her wracking sobs. Each pitiful cry was enough to jostle her body, and it sent her messy diaper squishing and wiggling as a result. The warm poop she had just unloaded shifted and settled. She could feel it pressing against her, and each time it just made her want to cry more.

Then Nightmare smacked her plot.

It was light and playful, but it sent the poop in her diaper squishing to new areas. Luna whimpered desperately as Nightmare kept her hoof pressed against her rear, grinning wickedly.

“Good job, Mushy Butt.” She waved her hoof in front of her nose. “Phew. What a stinky filly I have. But don’t worry, since you clearly like it so much I won’t change you just yet.”

Luna screamed, which just devolved into more crying. What did Nightmare mean she wouldn’t change her?

“Oh calm down, Princess Pottypants.” Nightmare patted Luna’s diaper, only aggravating the problem. “I just want your precious sister to see what a well-behaved foal you’ve become.”

Luna whined. At the mention of Celestia she tried to stand and run away.

SMACK! Squish.

A devastating spank to her flank put a stop to that right away.

“No need to be so excited. I’m sure she’ll be here soon.” Nightmare grinned. “And when she arrives, I think she’ll have to share the same punishments as you.”

Oh no, please no!

She turned, facing the crowd. “To be honest, this has been so much fun, I want to share it with all of Equestria. A fitting fate for a race of pathetic, sniveling foals, don’t you think?”

Luna pathetically sniveled, wiping her eyes on the puffy sleeve of her dress and suckling her pacifier in the hopes of calming down.

For the first time, she wondered if Celestia would actually stand a chance. Nightmare was so powerful now, that apparently nopony in Ponyville could stop her. Her confidence, and her long list of potential hostages, also couldn’t be ignored.

But if Celestia lost, just like her and just like Twilight, then there really wouldn’t be anypony that could save them. They’d be Nightmare’s playthings for eternity. The boundless humiliation Luna felt right now would never end.

She whimpered quietly, her dirty diaper bouncing along with her body as she did.

T-This can’t be real. Please tell me this is all a bad dream, o-or something!

“Oh, and Lulu.” Nightmare was back in front of her again. The fog on the ground bulged and formed six new jars of foal food. “You must be starving after the long walk here. How about some lunch while we wait for your sister?”

Luna screamed.

If this was a dream, it showed no signs of ending anytime soon.

And maybe it never would.