Living Nightmare

by Wandering Pigeon

Rating: mature
Tags: Random, Princess Luna, My Little Pony: Friendship is Magic, Dark, Nightmare Moon
Length: 17337

A stroll down memory lane turns into something much worse for Princess Luna

Princess Luna, in a bout of nostalgia, decides to visit her old castle in the Everfree Forest for a simple stroll down memory lane. But things don't go the way she intends when her past comes back to haunt her... among other things.

Warning: contains diapers, diaper usage, spanking, and ABDL themes.

Published 2017-02-03 21:20:01 UTC
Last updated 2017-02-16 21:23:29 UTC

The Night Mare's Nightmare

A crisp breeze brushed passed Princess Luna’s fur as she meandered through the winding path of the Everfree Forest. The gust was strong enough to give her pause as she chased a shiver from the base of her neck down to her hooves. When the sensation passed, Luna breathed a sigh of relief and found herself wishing for something to wear.

Aside from her royal attire--hoof guards, tiara, and necklace--she wore nothing. A poor choice for the chilly nights that followed Hearth’s Warming Eve, but one she could live with. Forcing back another shiver, Luna looked forward to her reason for such a late outing.

Striking an imposing figure before her was the ruins of her old castle. The dilapidated stone structure stood proudly before her, none of the usual star spider webs or wild plant life clinging to its exterior anymore. Luna recalled that Princess Twilight and her friends had recently been by to clean the castle up, back when the plan had been to refurbish it for Twilight to live in. Though, that had been before the magical-rainbow-crystal palace thingy had sprung up out of the ground for her. Now this old castle was alone and abandoned again, back to its usual state.

But tonight it would be getting a visitor. The previous Hearth’s Warming in Canterlot had been a throwback to old traditions, filling the Princess of the Night with all sorts of nostalgia. Though not uncommon for her since her return two years ago, this one was quite intense and had led her out here tonight.

She didn’t know what in particular she wanted out of this castle, but she knew it was one of the few relics from a time long in the past that might help her feel like she was… well, younger is probably the best word.

Luna smiled. Yeah, that was it. She wanted to feel young again; to go back to a time before she was a millennia old alicorn with centuries of knowledge, experience, and memories. That would be nice.

Shrugging off another breeze, she continued her walk to the castle, crossing a familiar rope bridge as she neared the doors.

As she approached the front of the castle her hoof hit the first of the stone steps leading to the door. Luna lurched to a stop to prevent herself from tripping, only to arch an eyebrow. Looking down, she saw a soupy layer of fog coating the floor of the Everfree, large enough to cover the first few steps of the staircase. While this wasn’t uncommon for the Everfree Forest, Luna couldn’t help but find it a bit odd.

Glancing back, Luna found her suspicions confirmed when she saw no such fog blanketing the path behind her. Further inspection revealed the fog only seemed to surround the castle, leaking out from the crumbling brickwork and expanding out a few inches past the perimeter.

That’s a tad… ominous, she thought to herself. Ominous, but not anymore so than the rest of the Everfree Forest. Luna knew that the weather here was wild, unpredictable, and far from uniform. So what if fog had clustered around her old home?

Using her innate pegasus magic, Luna brushed the fog before her away, revealing the steps before her. Taking more care this time, she climbed the staircase to reach the tall wooden doors to her old castle.

Nudge the rotting oak open, a noisy creak echoed out, causing Luna to wince. The dark, hollow interior of the castle foyer was now revealed to her as it stretched all the way to the two thrones in the back. The recent maintanence didn’t seem to have much impact on this room. Cracks lined the wall still, the roof was gone letting her pale moon rest above her head, and fresh spider webs had already appeared. Curiously, the ground inside the castle was curiously just a foggy as outside.

All in all, the castle just felt… spooky.

Luna shivered, despite the lack of a breeze. The satisfying feelings of nostalgic relief she’d been looking for weren’t here. This castle had changed too much.

But Luna refused to believe that. She’d come all the way out here looking for something after all. She stepped all the way inside, letting the door swing shut with the haunting screams of the ancient hinges hitting her ears.

She stepped forward, eyes wandering the room as she observed the damages of time, the few things she remembered, and the small improvements left behind by Twilight and her friends.

She stopped just sort of the thrones, smiling as she saw the recently re-stitched tapestries behind them. If nothing else, it was a pleasant sight to see these again.

But… this can’t be it, right? Luna’s mouth curved to a frown. I can’t shake the feeling that something is here.

“Well, well, well.”

Luna’s pupils shrank, her breath catching in the back of her throat. The icy, malicious voice that snaked its way around her ears like a familiar stranger. It was a voice she had never had this displeasure of being on the receiving end of: because it was hers.

Well, it used to be.

Luna whirled around, not wanting to believe her ears were telling her the truth. The second her eyes came to rest on the shadowy figure before her, she really wished they were lying to her too.

Slitted eyes sparkled with glee as a fanged smile grew ever wider before her. Nightmare Moon cackled softly. “If it isn’t my former host.”

Luna’s ears flopped down. She tried to take a step back, but her legs were shaking. Her heart raced with a pulsating beat so loud that it drowned out all background noise.

“N-No…” Luna whispered as a cold sweat formed on the back of her neck. “You can’t be here!”

“But I am here.” Nightmare grinned wickedly. “Wouldn’t you like to know how?”

Terror gripped Luna harder with each tremor of her body. What she was seeing simply couldn’t be real… but at the same time she could feel the hatred--the evil--radiating from the figure before her.

Nightmare’s helmet and armor suddenly dissipated, turning into smoke that slinked down to the fog at her hooves. Now Luna had an unobstructed view of her pitch black face, and had no way to deny what was happening.

“W-What is going on?” Luna’s voice cracked. “T-The Elements should have destroyed you.”

Fog swirled between them as Nightmare giggled softly. “Ohoho, they tried. Tried, and failed.”

Luna swallowed. She couldn’t move. She could barely breathe. She knew she should do something: attack, run, teleport… even calling for help would be better than nothing. But she was just too shocked and scared to do anything.

“A shred of my spirit was left after the Elements purged me from your body.” Nightmare took a step forward, and Luna one back. “I was barely a shadow of my former self, but I survived. I spent months nursing those wounds, giving me plenty of time…” Her eyes narrowed. “To contemplate my revenge.”

Luna’s entire body was shaking now. All she could do was retreat a few steps for each one that Nightmare took. “I… I won’t let you possess me again!” Luna yelled.

Nightmare actually paused. “Possess you?”

There was silence. Followed by maniacal laughter that would have shaken the roof if there was one.

“AHAHAHAHAHA!” Nightmare struggled to catch her breath. “Possess you? Puh-lease. If I wanted to spend another thousand years on the moon, believe me you’ll be the first pony I go to.” Her expression darkened as any hint of humor evaporated. “What I want is simple: vengeance.”

Princess Luna swallowed.

Nightmare started walking again, this time not stopping after two or three steps, forcing Luna to continue backing up. “I want to slaughter the ponies that injured me so. I want to make Princess Celestia feel the humiliation that I felt when she sent me to the moon. And I’m close, too. After I returned here, I spent a year resting and waiting, building up my power to its apex. I can even maintain my own physical form without a host. Nopony can stand against me now.”

Luna’s hind legs touched the wall. She was out of room.

“I was actually just about to head out, when you of all ponies show up.” Nightmare towered over Luna, snickering. “How poetic, that the first pony I get to humiliate is my former puppet.”

Come on, do something! Luna screamed internally. She willed herself to move, to speak, to do anything. She shut her eyes, trying to avoid crying. No matter what she tried to do, she felt too weak to do anything.

Suddenly, a wet, warm trickle touched the inside of her leg. Luna’s eyes snapped open as she let out an involuntary whimper. Shame hit her from every angle when the realization came that her bladder had given way out of fear.

And Nightmare noticed. She was wide-eyed at first before her face morphed into a devilish grin.

“You know, that actually gives me a pretty funny idea,” Nightmare said. “What Princess loses control like that, after all? You’re not royalty… you’re nothing but a foal.” She snickered, tossing her head up.

Just then, Luna saw an opening. Mustering up what shreds of courage she could, she choked back her paralyzing fear and ran.

For about five feet.

She made it just passed Nightmare Moon, before the fog below her whipped up and wrapped around her hooves. Heavy chains formed, weighing her down and causing her to trip.

“Ah!” Luna skidded across the ground, crying out in pain. Her tiara bounced free from her head Looking up, she saw the hoofcuffs binding her fore and hind legs. A brief tug told her there would be no breaking them.

“Now now,” Nightmare reprimanded. “No need to get all fussy. We’ll get you all cleaned up in just a moment.”

Despite the offer to wash away the warm pee clinging to her fur, Luna refused. Running on pure adrenaline to escape, her wings started to spread.

But in a mere half second, more fog raced around her body, wrapping her wings back down to her body by forming a thick black strap.

Nightmare stood over her again, shaking her head. “Tsk tsk tsk. Such an unruly foal.” She placed her hoof on top of Luna’s tiara, snapping it in two with a swift stomp. “And to think you actually considered yourself a Princess. Pathetic.”

Summoning up all her willpower, Luna pushed down her fear. She knew escape was a fruitless endeavor; now, all she could do was attack. Her horn lit up, shining brightly in the dark room.

And was snuffed out in a heartbeat.

More fog had appeared, taking the shape of an inhibitor ring to block all power from Luna’s horn. Her last line of defense, and only hope, was gone now. She was at Nightmare’s mercy.

“HELP!” She screamed. Nopony was around to hear her, but her panicked mind couldn’t process this. She just wanted to flee from Nightmare Moon as soon as possible. “HELP! SOMEPONY, PLEASE!”

Suddenly, she felt a pull. Looking over, she saw Nightmare lifting her tail up telekinetically, exposing her rear to the dark alicorn.

Then…

Smack!

Nightmare whipped her hoof against Luna’s cheek, delivering a vicious spank. It took a moment for the fiery, stinging pain to register, but when it did Luna squeaked. She kicked her hind legs, but the chain holding them down became enveloped in smoke, morphing into a spreader bar. Now her legs were stuck apart, basically useless. If it weren’t for her current situation, Luna might’ve been impressed by the seamless control Nightmare exhibited with her magic.

Impressed, but still terrified.

“Such a naughty filly.” Nightmare shook her head, but smiled in the sadistic pleasure she got from this. “If you want to get cleaned up, then you better start acting like a good foal.”

“Let me go!” Luna cried, wiggling in a vain attempt to escape Nightmare’s magical hold on her tail.

Smack! Smack! SMACK!

“Ah!” Luna bit her lip, tears lining her eyes. The pain was searing, and nothing she did could alleviate it. She whimpered pitifully, hoping Nightmare was satisfied and ready to let her go.

She wasn’t.

Nightmare shifted her magical aura to encompass Luna’s whole body. She lifted the rest of the Princess of the ground, swinging her around to be right side up. Luna sniffled as her stinging bottom finally got relief, but still felt shame at the damp feeling between her legs.

“Now then,” Nightmare grinned. “Since you’ve learned your place, we can get started.”

Get started? Luna sniffled again. She had hoped Nightmare was almost finished with humiliating her. What more could be left for her to do?

But then again, if Nightmare Moon was finished, then she might simply kill Luna before moving on to the next pony. Though she was terrified, ashamed of herself, and powerless, Luna knew she couldn’t let that happen. Even though she could barely look at Nightmare without trembling, she had to find a way to stop her. Somehow.

They moved out of the throne room and down a narrow hallway. Luna didn’t ask where they were going, fearing Nightmare might spank her again. The dark alicorn briefly glanced at a few doors they passed, before stopping in front of one that was slightly ajar.

She pushed it open, revealing a spacious guest bedroom that showed clear signs of age. Nightmare nodded. “This one will work.”

“Work for what?” Luna asked, hoping she wouldn’t notice the fear in her voice.

Nightmare didn’t offer an answer. Instead, she nodded her head forward and the fog coalescing at her hooves surged forward. It washed over the floor, climbing over rotting dresser, the vanity, and the bed. The fog scuttled up the walls, inside the walk in closet and coated even the ceiling.

Once the dense haze had every inch covered, it started slipping away. It left the center of the floor first, the wooden floor now transformed into pink, fuzzy carpet. As if faded from the walls, all damage was repaired and new wallpaper sporting pink, red, and white hearts was left in its place. When the dresser was uncovered it was a brand new changing table, resting on a set of draws. The vanity reappeared, but as a playpen large enough to hold a full grown alicorn. When the bed became unshrouded, it had morphed into a crib of comparable size.

More changes to the room were noticeable too. The walk in closet was now filled with bright, colorful fabrics. From the ceiling, a new light fixture was hung, along with a mobile over the crib, and a baby bouncer that dangled in the back corner of the room.

Luna could only gape in horror at the foalish sight before her as the fog descended back to Nightmare’s hooves. Nightmare in turn, just snickered.

“Do you like your new room, baby?”

Luna’s stomach flopped, realizing what Nightmare intended to do to her. She squirmed and struggled ineffectually in her magical bonds and physical ones. “Y-You can’t be serious.”

This only made Nightmare laugh harder as she walked into the newly formed nursery, pulled Luna in with her. “I’m am dead serious. What more perfect humiliation could there be for a pony as worthless as you?”

Nightmare set her on the changing table with surprising delicacy. The cold plastic caused Luna to shiver as her bound hind legs were lifted into the air. Although she was down, the magic hold was still keeping her immobile, unless Nightmare wanted otherwise.

“Please don’t…” Luna whimpered. The sting of humiliation burned worse than her rear end right now. She didn’t want it to get worse.

She heard the draw below the changing table open. Nightmare started humming as she rummaged about within it, not even deigning to respond to Luna.

She lifted something from the draw, but kept it in Luna’s blindspot. The Princess of the Night wasn’t kept in suspense for long, because something cold and damp touched her nethers and she squeaked in surprise.

A foal wipe. Nightmare Moon was cleaning up her accident with a foal wipe.

Luna tried not to shudder, or give Nightmare the pleasure of pleading. She just waited patiently for the dark alicorn to clean up her urine. It was a daunting task, because every time the wipe touched somewhere new, the same cold shiver would jut Luna back to the reality of her situation.

Nightmare finished her humming, finally pulling the wipe away and tossing it to the ground. It turned to fog before it could even hit the floor. “There, all clean. Now to make sure that doesn’t happen again.” Nightmare leaned in and booped Luna’s nose with a sinister grin. “Can’t have Mommy cleaning up all your messes, can we, Lulu?”

“Mommy?” Luna’s brows furrowed. “Lulu?” Something told her Nightmare was into this way more than she should be.

“Ha! The look on your face is priceless.” Nightmare reached back into the draw and withdrew a new, poofier item.

Luna took only a half second to realize what it was. “A d-diaper?!”

A part of her had hoped Nightmare hadn’t planned to take this humiliation that far. Another part of her had known it would come to this, or rather, feared. But as the white, fluffy foal garment stared her down, Luna couldn’t help but feel shock that this was actually happening.

“Of course. Can’t forget Lulu’s protection, now can we?” The fiendish smile on Nightmare’s face was a show of pure glee. She loved the chance to put Luna in the worst possible position. It was like she had been fantasizing about this moment.

“P-Please don’t. I don’t need diapers.” Why was she whimpering like a child to her mother?

“Recent events suggest otherwise.” Nightmare unfolded the crinkly garment. Luna’s eyes widened as she got a good look at it’s size. It was nearly twice as big as her head!

She kicked her bound hind legs, watching them uselessly flail as the diaper was slid under her butt. Nightmare put a hoof on the spreader bar and started pushing down, lowering Luna’s legs until her rear end made soft, crinkly contact with the diaper. She kept pushing until Luna’s bottom sank deep into the padding.

Though she had managed to avoid it up until this point, Luna blushed. Her face shifted from dark blue to bright red in what felt like nanoseconds, and the heat radiating from her face might have been enough to melt polar ice caps.

“There we go. See? Diapers aren’t so bad.” Nightmare wrapped the diaper snugly around Luna and threading her tail through the hole in the back before taping it down. “No need to be a big baby about it,” she teased.

Luna squirmed some more. Now that she was being hugged by padding, it was hard to keep what little composure had survived up until this point. She moved her forehooves instinctually down to rip it off, only to find them slapped away by Nightmare.

“Bad filly. It seems I’ll need to take some precautions to keep you from fiddling with your diapers.” Nightmare’s condescending, almost motherly tone, made everything she say a thousand times worse. Luna didn’t know what ‘precautions’ she was talking about, but just the way she said it made her know she wouldn’t like them.

Nightmare disappeared for a moment, walking into the nearby closet. As soon as she was gone, Luna tried to sit up, but was still held in place by the magical aura. She wanted desperately to escape, but was faced with the horrifying fact that escape may not be on the table anymore.

If she had been less of a coward, she could’ve teleported away, or fought back even. Instead she’d peed herself. Now, she was powerless and diapered. Nightmare’s sudden return had turned her into an infant, quite literally, and there was nothing she could do about it.

“Here we go!” Nightmare reappeared, her telekinesis bringing with her four pink, fluffy booties. Nightmare returned to the changing table and removed Luna’s shoes with one swift yank of magic, her fog reaching up and dragging them away.

At first, Luna was confused by the sight of the booties. What sort of precautions are those?

However, when the first foalish shoe was slipped onto her hoof, she understood. The fluffy insides of the bootie was a prison for her hoof. She wouldn’t be able to remove the diaper, or do any meaningful task, with those cumbersome things on her.

“Wait--” Too late. All four booties soon found new homes on Luna’s hooves. She found herself being lifted from the table, kicking her legs in a vain attempt to remove her new trappings.

“Aww, what adorable little hoofies,” Nightmare cooed. There was something sadistic about the twinkle in her eyes. She took so much pleasure in Luna’s situation; humiliating her former host--the pony that had failed her and cost her so much--must be a satisfying catharsis for her.

Luna couldn’t shake her blush as she was set on the ground. The chain around her forelegs dissipated into fog and fell to the floor. The spreader bar and the inhibitor ring stayed.

The aura around her body finally left, freeing her just slightly. Her heart skipped a beat, realizing this meant escape was more likely now, but that dream was killed quickly. Between how far she would have to run away, her lack of magic, and Nightmare’s overwhelming power, escape was still off the table It was nowhere near the table, even.

Nightmare sighed, taking a step back to admire her work. “This is better than I could’ve ever imagined. You’re nothing but a pathetic foal now.” She laughed, rubbing salt in the wound.

Luna’s mind raced, thinking of anything she could do to get away. Not just to escape being Nightmare’s diapered plaything, but also to warn others. Nightmare had expressed a desire for revenge against both Celestia and Twilight, as well as her friends. She wanted to humiliate the former, not unlike Luna herself, and destroy the latter, possibly to prevent the usage of the Elements.

Does she even know the Elements have been returned to the Tree? Luna decided not to mention it. The less Nightmare knew about that the better. If she was aware that the Elements of Harmony were out of play, she might attack immediately.

Right now, Luna’s only hope was to keep Nightmare preoccupied long enough for her sister to notice her absence and come looking. Hopefully she would be better prepared to deal with Nightmare than Luna was. If not…

Don’t think about that. Think about ways to keep Nightmare busy, even if it costs you your dignity. Luna shifted, earning a crinkle from the diaper at her waist. Well, just keep her busy. When Celestia notices I’m not lowering the moon in the morning, she’ll know something’s wrong and will come for me.

That was Luna’s best hope. Even though she hadn’t mentioned her visit to the old castle to anypony, she didn’t doubt her sister’s ability to locate her. All that was left was to wait and stall.

Swallowing, Luna decided to voice a question that was on her mind. “N-Nightmare, w--”

“Call me Mommy,” Nightmare suddenly demanded.

Luna’s ears folded down, repulsed by the idea. “What? No!”

Nightmare’s jovial expression soured in an instant. Before Luna knew it, Nightmare was on the floor, dragging Luna over her lap. Turning her head ever so slightly, Luna saw a black hoof raising as magic pulled her diaper down to expose her plot. Her eyes widened.

Smack!

“You will do as I say.” Nightmare’s voice was cold, and full of malice. The joy she’d been taking in humiliating Luna had transformed into a figure that commanded her obedience.

Smack! Smack! Smack!

“Understand?”

Luna whimpered. Her plot had barely recovered from her last spanking, and this one was easily worse. “Y-Yes. I understand!” Tears welled in her eyes again.

“Good.” Smack! “Now.” Smack! “Call.” Smack! “Me.” Smack! “Mommy.” Smack! Smack!

“Mommy!” Luna cried out, on the verge of crying. “Mommy! You’re my Mommy!”

Nightmare lowered her head, positioning her lips right at Luna’s ear. “And don’t you dare forget it.”

Luna sniffled, nodding her head. A tear broke free from her eyes and rolled down her cheek. Her humiliation had momentarily made her forget the terror of being in Nightmare’s presence, but that reminded her real quick.

“Now then.” Nightmare pulled Luna’s diaper back into place and set her down before standing. “It’s past your bedtime young lady. You stay right here while I go and get your pajamas.”

Luna breathed a sigh of relief as Nightmare walked back to the closet, grateful she was back to using the motherly, teasing voice. She wiped the tear from her face and sniffled. Her plot stung from her spanking and she laid down on her belly so it wouldn’t feel worse. Even just wearing the dainty, fluffy diaper as tight as she was made the issue worse.

She whimpered. Keeping Nightmare Moon occupied was going to be tough, but if she could just hold out until the morning...

...Wait…

Luna shook when she finally processed what Nightmare had said. Bedtime? But that means…

If Nightmare put her to bed, she could go out and exact her revenge on the rest of Equestria, leaving Luna even more powerless to stop her. Her plan to stall Nightmare Moon just got a whole lot harder.

“Here we are.” Nightmare walked out of the closet, a pale blue nightie that bore a crescent moon pattern in tow. She unfurled it, letting Luna see that it was just big enough for her. “What do you think?”

Luna groaned in the back of her throat. She can’t be serious.

“Oh don’t give me that look, young lady.” Nightmare narrowed her eyes, conveying the serious threat hidden behind her maternal tone.

Luna tried shrinking behind her mane. Just stall for time, that’s all I have to do. “U-Uh… Can I have a different nightie? I don’t like the… color.”

“Nope!” Nightmare happily said. Her smile said that she could see right through Luna’s plan.

She walked over and proceeded to stuff Luna into her new pajamas. Despite putting up a bit of a struggle, Luna knew she was no match against Nightmare Moon at this point, eventually giving up as it was zipped on.

Luna frowned, looking down at her hooves to see the fabric bulging to accommodate the booties Nightmare hadn’t bothered to take off. Her diaper also bulged underneath the nightie, making her butt look big.

Blushing, Luna almost didn’t realize that she was being lifted up by magic. Looking back up, she found herself eye level with Nightmare.

Grinning wickedly, Nightmare pushed something into Luna’s mouth. Her eyes widened as a rubber nipple invaded her lips and when Nightmare’s hoof pulled away and she saw the bright pink, plastic guard she immediately spat it out.

“No!” She cried. The dark expression on Nightmare’s face took all the bravado out of her next words. “I-I don’t want that…”

Nightmare raised her hoof, fog jumping to it to form a new, identical pacifier. She pushed it back into Luna’s mouth, holding it there for a moment. “Don’t drop this again, okay sweetie?”

Luna chased a shiver down her spine, the malice in those words shaking her to the core. She clamped her teeth down on the bulb of the pacifier, suddenly determined not to drop it.

She was levitated over the crib and lowered inside. Just from the height of the bars Luna could tell she’d wouldn’t be climbing out on her own.

As her head hit the pillow, fog started snaking up the bars of the crib. Luna blinked in surprise and followed the trail up to the top of the crib, where the fog formed a new row of bars right overhead, ensuring she was trapped no matter what she did.

“There we go, all nice and snug and ready for beddy-bye.” Nightmare snickered. “Sleep tight, Lulu.” She turned to leave.

Luna whimpered. “W-Wait.”

Nightmare froze, and barely glanced back. “What?”

Luna swallowed, desperate the find some way to delay her. “I… I…”

Nightmare scoffed. “If you’re worried about your sister or your friends, don’t bother. I want to spend a little more time with my ‘precious little foal’ before I exact my revenge upon them too.”

She bit down on her pacifier, not sure if that was a good thing or not. Or if she could even trust it for that matter.

Nightmare chuckled softly as she walked out, snapping the light off and closing the door to leave Luna in complete darkness. Just before the door sealed Luna in, Nightmare let loose a flick of magic and sent the mobile over her head spinning.

“Night night, Lulu. See you in the morning.”

Nightmare's Night Mare

Luna hardly got a wink of sleep. Despite the admittedly cozy warmth provided by the nightie, dozing off was an impossibility that night. Every time she tried to move to get comfortable, some part of her hit the bars of her crib. The pacifier in her mouth was awkward and intrusive, but she didn’t dare spit it out for fear that Nightmare might be watching, waiting to punish her for disobeying. On top of that, each little shift across the crib caused her diaper to crinkle and her still throbbing cheeks to sting, a constant reminder of her current predicament.

And above all of that, there was the worry. A deep, nagging fear of what Nightmare Moon would do to her in the morning, as well as the concern that she might’ve lied to Luna and gone out to exact her revenge upon Ponyville now. Either way, it was enough to leave a pit in her stomach, to the point where restful slumber was impossible.

At one point though, she must’ve finally slipped into unconsciousness, because the next thing she knew Nightmare Moon was rattling the crib, jolting her awake to her now bright room.

“Wakey wakey, sleepy head,” Nightmare hissed.

Luna shook, eyes shrinking at the sight of the unholy concentration of evil before her. Her heartbeat sped up, letting her know she was still just as terrified of her as she’d been last night.

The top of her crib-cage dissolved into the nightmare fog and slipped to the floor, just as Nightmare lifted Luna up with magic. Soon she was snout to snout with her, feeling a cold sweat break out on her forehead.

A sinister grin curled its way onto Nightmare’s face. “Just wait until you see what I have planned for you today!”

The happy, cheery tone let Luna know that whatever the plans were, she would hate them. Her face must’ve reflected that, because Nightmare’s mouth dipped into a frown.

“Now don’t be like that, Lulu,” Nightmare said, voice dripping with mock sweetness. Her eyebrows lowered. “If you don’t stop pouting, I might have to give you a little discipline.”

Discipline meant spanking, and Luna’s butt was still sore from its flirt with Nightmare’s hoof last night.

Lowering her ears, Luna forced a smile behind her pacifier and tried to look happier. Although it pained her to admit it, Nightmare had already effectively conditioned her to not fight back. Being an obedient filly wasn’t pleasant, but it was better than a stinging plot; Luna had made her choice regarding that.

“Good girl.” Nightmare seemed appeased. “Now, why don’t we get you out of that nightie so we can check your diapee.”

What?!

As the cotton nightie unzipped magically and slipped free of Luna’s body, she couldn’t help but feel she had misheard. Nightmare was going to check her diaper? As if she actually expected Luna to use it?

I… I didn’t use it, right?

Luna wiggled her legs, forcing the diaper to press against her waist. Luckily, it was as dry and fluffy as she’d left it the night before. She breathed a sigh of relief, even as Nightmare pressed a hoof to her crotch to double check.

“There, nice and clean.” Nightmare giggled. “Aren’t you lucky to make it through the night dry?”

I usually do, Luna thought angrily. Nightmare’s patronizing tone was not appreciated right now.

“Alrighty then, my little filly must be hungry. Why don’t we get some breaky in you?”

Luna felt the hollowness in her stomach, and raised no objections. However, a sinking feeling in the back of her mind told her little imagination was required for what her breakfast might be.

The fog blanketing the floor suddenly surged near the center. It took all of a few seconds for a high-chair to be constructed in the middle of the room.

Luna found herself being thrown in the chair. Before she could even say “oof!” the built in table was slammed in place, looking her hooves below it. She bit her lip, shifting only to find that with her diaper squeezed in so tight she had no wiggle room.

More fog climbed up the high chair, and quickly took the shape of a purple bib at her throat. Looking down, she could see the pink letters scrawled onto it: Mommy’s Little Cutie.

She groaned.

“Oh, don’t be like that, Lulu. Look, Mommy has some of your favorite foods.” Nightmare winked; a clear indicator she didn’t even know what foods Luna remotely liked, nor did she care.

Nightmare held up her hoof, a spoon forming in her grip. With it, she pointed down, dragging Luna’s line of sight with her. She clinked the silverware against a few jars on the high chair’s table.

At the sight of the jars, Luna’s stomach dropped. Foal food. Why did I even entertain the hope that it would be anything else? Her stomach seized further upon reading the labels for the food.

Strained peas? Asparagus? Cauliflower and broccoli? Are these meant to torture foals or feed them? Luna wrinkled her nose at them all. She didn’t like the normal versions of these vegetables all that much, and couldn’t imagine their mush versions were a huge improvement.

Sister you better find me soon.

Nightmare reached up, putting her hoof on Luna’s pacifier. In a desperate attempt to delay the inevitable, Luna bit down on the bulb just as Nightmare tugged, keeping the pacifier in her mouth. Nightmare’s eyes narrowed and she tugged gently once more, only to be thwarted again.

“Lulu.” Nightmare’s voice was calm, yet icy. “You can’t eat if you keep your paci in.”

“Mmm mmm!” Luna shook her head defiantly. She was hungry, but she felt she might have a chance at convincing Nightmare to change her meal. Even if it was just to something like peach or banana flavored foal food; she would take that over her current option.

“Lulu, don’t be fussy.” Nightmare’s buttons were clearly being pressed. Luna could only hope she wasn’t pushing too many. “Five… four… three… two...”

Luna raised an eyebrow. She doesn’t actually think I’ll give in just because--

“One.” Nightmare’s face shifted to anger. The table for the high chair flew open and Luna was ripped from her seat.

Fear shook her, and Luna immediately recognized she’d gone too far. She spat out the pacifier in a meager attempt to appease Nightmare. “Look, it’s out! It’s out! Please feed me!”

It was no use. Nightmare sad down and pulled the squirming Luna into her lap. With magic, it wasn’t hard to keep Luna still while she pulled down her diaper to expose her plot.

“No!” Luna wiggled as best she could, but Nightmare rested her other hoof on Luna’s back, cementing her position further. “No. No! Please, no!”

Smack! Smack! Smack! Smack!

“Gah!” Luna winced in pain. These spanks were nowhere near as slow and deliberate as last nights. This was a flurry of pain pats to the plot to force cooperation.

Smack! Smack! Smack! Smack! Smack! Smack!

“Ow! Ooow!” Luna’s face contorted into a mix of shame and pain. Ten spanks in and she could tell her butt was already glowing red.

Smack! Smack! Smack! Smack! Smack!

“Please stop! N-Nightmare please!” Luna begged, but her words fell on deaf ears.

Smack! Smack! Smack! Smack! Smack! Smack! Smack!

“Ah! OOOooow! OW!” Luna slammed her eyes shut and bit her lip, crying out in muffled pain. This wasn’t a spanking just for the pacifier. This was a clear, undeniable lesson: never defy Mama Nightmare. Ever.

Smack! Smack! Smack! SMACK! SMACK! SMACK!

Luna cried out, tears rushing from her eyes as the spanks picked up in intensity. It felt like Nightmare was only just getting started. Desperate for it to end, Luna launched into a blubbering, pitiful apology.

“I’m sorry! AH! N-Nightmare I’m sorry. I’m so sorry!” SMACK! SMACK! “N-- M-Mommy I’m sorry! Please stop! I’ll be a good girl now. Please, Mommy!”

Just like that, Nightmare’s hoof froze. Luna sniffled, hot tears on her cheeks. Her rump was on fire. There was no way to describe the sheer ferocity of her stinging plot. Every millisecond was a pulsating barrage of stings. She even squeaked in pain as her diaper was pulled up over her butt. The cool padding did little to mitigate the issue.

“Aww, there there.” Nightmare patted Luna’s head. “Little Lulu’s learned her lesson? I’m not going to have a disobedient foal anymore, am I?”

“No!” Luna whimpered out, perhaps too quickly. Her face heated up with a blush that rivaled her red flanks. “I-I’ll be a good filly, Mommy.”

“You’d better.” Nightmare stroked Luna’s head as she leaned in. She pressed her lips right on Luna’s ear and used her most sinister voice. “Because next time, I won’t stop.”

Luna gulped. She couldn’t disobey Nightmare anymore. As much as it pained her to admit it, a few slaps to the butt was all it had taken to break her will. Now it she wasn’t a submissive, perfect little foal, she’d be in for a world of hurt.

Nightmare wrapped her in her midnight shade of aura once more and lifted her into the air. Standing, she brought Luna back over to the high chair, sat her down, and locked her in place.

“Now, are you hungry, sweetie?” Spoon back in her hoof, Nightmare lifted up the jar of strained peas and unscrewed the cap.

Luna could barely muster up any words. Her plot was still burning, and the sight of the foal food made her mouth dry. On top of that, she was choking on her own shame. But she had to say something, or risk incurring Nightmare’s wrath again.

Swallowing the single spec of pride she’d somehow retained, Luna opened her quivering mouth. “Y-Yes, Mommy.”

“Good girl.” Nightmare’s voice had finally made the transition back from cold harshness to mockingly-sweet. She dipped the spoon into the greenish brown mush of the jar and pulled out a glob of strained peas.

Luna fought back a whine as the spoon neared her mouth. She reluctantly parted her lips, making a gateway just wide enough for the ‘food’ to make it’s way in, as she closed her eyes and prayed for her rescue.

When the spoon dropped the lump of mush on her tongue, her entire body shuddered. The taste was vile enough to make her want to retch. It was less like peas and more like vomit.

The spoon left her mouth and Luna pushed the foal food into her cheeks, but a thin layer remained stuck to her tongue. Fighting back the urge to gag, she was about spit out her meal before another spoonful forced its way into her mouth.

The rushed entry left bits of food clinging to her mouth, but a much larger pile resting on her tongue. Luna could barely handle the ghastly, bitter sensation and pushed it into the other side of her mouth.

Now with both cheeks bulging with the rotten foal food, Luna had nowhere else to hide the glorified slime. She saw Nightmare preparing a third spoonful and whimpered.

As the spoon neared her lips, Luna felt new tears rising. She was already crying again. It was pathetic of her, but she couldn’t help it. So far, today had been the most torturous experience of her life, and she wasn’t even halfway through breakfast.

Nightmare pushed the spoonful of mush into her mouth, dropping it on her tongue and pulling it back out. Luna thrashed in her high chair. The putrid taste dominated her mouth; she had no way of escaping the gross, shudder-inducing taste of the strained peas. Not caring about the consequences, she prepared to spit out the food.

But just then, magic clamped her lips shut.

“Mmm?” Luna’s eyes widened and she looked to Nightmare, whose horn was glowing.

“Now now, don’t be so fussy. You’re going to have to swallow eventually.”

“Mm mmm…” Luna sniffled. She didn’t want to, but without the option to spit, the only other choice was to let the food sit on her tongue indefinitely, and that was not happening.

Forcing down more shudders and about a dozen attempts to gag, Luna swallowed. Mush slithered down her throat, nearly forcing her to hurl. Unfortunately, she still had a few mouthfuls left.

Hot tears decorating her cheeks, Luna swallowed again, and again. The strained peas forced their way into her belly, sending shivers throughout her entire body.

When Nightmare was satisfied, she released her hold on Luna’s lips. She sucked in air, desperate to have something else in her mouth besides the slimey remnants of her meal. She coughed, and gagged, and almost hurled, but the threat of having to taste the strained peas again gave her the strength to resist.

Her eyes found the empty jar in Nightmare’s hooves, and Luna breathed a sigh of relief, glad her meal was over with.

“Alright, now for the asparagus.” Nightmare picked up one of the remaining jars of foal food and popped off the lid.

Luna’s heart skipped a beat. “B-But… I-I’m not hungry anymore.” That was a lie, the strained peas hadn’t exactly been filling.

Nightmare just laughed coldly. “Nonsense, a growing filly needs to eat.” The spoon dipped into the fresh jar.

Luna started crying as the fresh mound of green-tinted garbage neared her mouth. She wanted so badly to reject it, but the consequences would be severe.

As she sniffled, she caught a whiff of the food and her nose wrinkled. It was disgusting; at least the peas hadn’t had a scent.

When the spoon pushed passed her lips, Luna swallowed in desperation, knowing better than to prolong her suffering. The asparagus flew down her throat, and her body contorted in response.

The peas had been bad, but the asparagus was on a whole new level.

Seeing that Luna’s strategy changed, Nightmare adapted. The next spoonful wasn’t a pile. She was now saving as much foal food as possible to keep heaping it at Luna.

The asparagus lasted twice as long as the peas, and clung to the insides of Luna’s mouth to mix with the peas leftovers and create a disturbingly nasty after taste.

Nightmare moved for the final jar and Luna broke down crying.

In between her cries, she heard Nightmare’s devious giggles. “No need to be sad, sweetheart. Num-num time isn’t over yet.”

You’re so cruel, Luna thought as a concoction of broccoli and cauliflower was shoved into her mouth. By some horrendous twist of fate, it was even worse that the last two combined.

Luna wailed in between bites, crying even more than when she’d been spanked. Honestly, at this point she would take that over this.

Nightmare made sure to keep shoveling in this foal food, knowing it only made Luna more miserable. She didn’t even get time to swallow with how fast Nightmare was going.

It was an act of mercy when the jar was finally emptied. Luna took the brief respite from her torment to clear her mouth. She swallowed the foal food as fast as she could, not even caring about the leftover bits of disgusting slop that stuck around in her mouth. She finally managed to stop crying, knowing the horrors of eating foal food were finally over. And it was a good thing too, as nasty as the stuff had been it had at least gotten her full.

Her messy bib levitated away from her and Nightmare folded it up before licking the edges and using it to wipe off the bits of food on Luna’s face. She even brushed away the tears running down her cheek.

“D’aww, my little foal loved her food so much she cried tears of joy. Don’t worry sweetie, I’ll make sure you get plenty of it from now on.” Nightmare gave a big, toothy grin at that remark.

Luna sniffled as the bib floated away and dissipated into dark smoke. Of course, because when was Nightmare Moon ever reasonable?

The table keeping her forelegs pinned opened up, freeing her to move. But what should she do? Pathetically scuttle away and fail miserably? Kick and thrash? Cry again?

Luna doubted any of that would be helpful, or even get the bad taste out of her mouth.

“Upsie daisie!” Nightmare suddenly lifted Luna into the air, actually deign to use her hooves rather than magic. The high-chair fizzled out of existence as the two sat down, Luna being snuggled up against Nightmare.

Naturally, she tensed up in such a position. Half of her face was buried in the chest fluff of her captor, and her diapered butt was resting comfortably in Nightmare’s lap.

Nightmare pressed one hoof around Luna’s head, and raising the other one used her magical fog to summon an adult-sized baby bottle. Milk swirled and shifted inside, and Luna whined in the back of her throat.

Nightmare didn’t seem to care, as a second later she pushed the amber nipple of the bottle into Luna’s mouth.

As demeaning and humiliating as it was, Luna had suffered far worse already that day. She closed her lips around the bottle and silently hoped its contents wouldn’t be as nasty as her breakfast.

Taking her first suckle, Luna’s eyes sparkled in delight. Silky, creamy milk splashed into her mouth, washing away a huge chunk of the lingering foal food.

Luna swallowed and suckled again, greedy for more. Her efforts were rewarded as more and more milk flooded her mouth. Her hooves leapt up and wrested the bottle away from Nightmare so she could push it further into her mouth. Not that it made the milk come out faster, but she did it without even realizing.

Nightmare chuckled to herself while Luna instinctively cuddled deeper into the larger mare’s chest. She suckled on the bottle for what felt like hours, the milk like nectar compared to the swill she’d just been forced to eat.

Eventually, the well did run dry. Before too long Luna was suckling an empty bottle, trying to wring whatever leftover drops it might hold.

“Okay, that’s enough.” Nightmare plucked the bottle from her grip easily, and just like that the spell was broken.

Luna suddenly realized what she’d been doing, and whose fur she’d buried her face in. With an ‘eep’ she rolled free of Nightmare’s lap, blushing furiously.

Nightmare just laughed at her. “So eager to drink from your baba. What a good filly.” She gave Luna’s head a pat, who in turn flinched at the slightly affectionate touch.

Pushing herself up, Nightmare smiled down at Luna, her devilishness quickly returning. “Now that breakfast is done, you look like you could use some playtime.”

“P-Playtime?” Luna felt herself rise from the floor.

Nightmare eyed the playpen across the room and nodded. “Yes, some private playtime.” Suddenly the pacifier was back in Nightmare’s hoof and she pressed it into Luna’s mouth. “Here, now don’t you lose it.”

Luna’s face scrunched with worry. She suckled the pacifier a few times, hoping that would appease Nightmare.

“Good girl!” She dropped Luna into the playpen, apparently appeased.

Her diaper cushioned her fall with a loud crinkle. As Luna looked up, she saw the mesh walls of the playpen surround her on all sides. The top swung closed, and a tiny padlocked formed on the outside, locking into place as it trapped Luna within.

Nightmare smiled at her. “Mommy needs time to prepare for later today.”

Luna didn’t like the sound of that. “W-Wha’s wader duday?”

A fanged smile answered her. “Why, our outing to Ponyville. I have to go make sure it's ready for our visit.” Nightmare trotted away, snickering as Luna’s stomach flopped.

Ponyville, but that’s… Nightmare was planning to target Twilight and her friends, no doubt. And humiliate Luna in front of her subjects. It was a two birds, one stone deal, and the outlook was grim.

Luna’s attention turned to the floor of her playpen. If there was something here that could help her escape so she could flee to Ponyville and warn Twilight, she would want to use it while Nightmare left the room.

Sadly, the only thing available to her was a hoofful of blocks and a rattle. Not exactly escape tools.

Luna tried sitting up, but found her head hit the top of her playpen. Staying low, she suckled her pacifier some more as she thought.

Well… it was kind of hard to think while suckling. It reminded her of drinking from the bottle, and that just made her relax.

Luna sank her head against the plastic floor of the playpen. Her diaper crinkled as she shifted, rubbing the soft interior against her. It wasn’t so bad when Nightmare was gone, now that she thought about it.

Still, I can’t get too comfortable. Nightmare will do far worse to my sister and my friends if she makes it to Ponyville and beyond. I have to think of a way to warn them… somehow…

Can't Wake Up From This 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.

The Nightmare That Never Ends

Luna gagged as the last dollop of lima bean foal food found its way into her mouth. Hot tears ran down her face, the result of eating so much vile mush for so long.

Around her, Nightmare had allowed the ponies of town to gather in a large crowd. Well, less allowed and more ordered. Everypony had been forced to clump together for the best view possible as Luna was spoonfed another round of foal food. She at least took solace in the fact that Nightmare hadn’t forced her into a highchair again. Maybe it was simply because it was easier for Ponyville to see her shame this way.

Speaking of, Luna shifted in her messy diaper, the mush now much colder, but still just as slimy. Every time the poop squished and slithered across Luna’s backside, she was reminded of the dirty deed she’d done. The fact that Nightmare still hadn’t changed her was only adding to her feelings of shame, to say nothing about the town's worth of ponies staring her down.

She could still hear fleeting snippets of conversation from them. Though she couldn’t make out much, it was pretty clear there was only one thing they could be talking about: their pathetic foal of a Princess.

Twilight Sparkle was down in front, her friends to the right and left of her. Nightmare had insisted they had to get the best view, but Luna partially believed she didn’t want to let them out of her sight. She still didn’t know what Nightmare knew about the Elements of Harmony and their inactivity. If she expected Twilight and company to go for them at any point, she may end up killing them to spare herself the trouble.

Just the thought made Luna shiver, but she didn’t know if it would be any better to reveal the Elements had been returned to the Tree or not.

Nightmare finally pulled the spoon from Luna’s mouth, letting the lima bean flavored garbage rest on her tongue. The feeling made Luna shudder, and she hastily swallowed, despite how badly she wanted to throw up.

“Such a good eater,” Nightmare commented with a smile. She undid Luna’s bib and levitated it towards her mouth. Nightmare found a clean corner, and dabbed it against her tongue before using it to wipe off Luna’s mouth. “There we go!”

As the bib floated away and dissipated into fog, Luna couldn’t help but blush with indignation. How could Nightmare slip so easily between mother and vicious dictator?

The remnants of her lunch stuck around in her mouth. Luna whined as the nasty mush clung to the roof of her mouth and the insides of her cheeks. She squirmed in discomfort, but only succeeded in spreading the mess on her rear.

Nightmare sat down on the grass and crossed her hind legs. She looked over to Luna and patted her lap, telling Luna to join her.

At first, Luna hesitated. Right away she knew Nightmare wasn’t forcing her onto her lap simply because it would look like Luna was willing to the citizens of Ponyville otherwise. If she did so without putting up a fight, it would look like she was going along with this like an obedient foal would.

But if she didn’t, Nightmare could very easily make her. And the punishment that could result would be devastating.

Her sore rear ached at the memories of the spankings. Even with the diaper’s padding and her own poop, it still hurt to sit down.

Just then, the fog in front of Nightmare’s gather together and formed a large, full foal bottle.

Luna immediately perked up, her mind instantly going back to earlier that day. Her vile breakfast had been washed away by the sweet taste of milk.

She started to get up, needing no more beckoning to join Nightmare. Before she could stand however, Nightmare shot her a glare. Luna retracted, fearing she’d done something wrong. As she lowered herself back to the ground, Nightmare nodded, and it was then that Luna realized she was supposed to crawl.

Even though she didn’t want to demean herself further, what would it matter at this point? Besides, she wanted to get the rancid aftertaste of the foal food out of her mouth.

Moving down to her fetlocks, she crawled over to Nightmare, ignoring the looks she got from the crowd.

She climbed onto Nightmare and rolled over, wincing as her messy diaper squished against Nightmare’s lap. Though it was subtle, she thought she felt Nightmare shudder a little bit at the feeling of the cold, dirty diaper. But she could’ve just imagined it too.

Nightmare took a moment to smooth out Luna’s skirt, delaying her bottle. Luna whined in anticipation, the gross taste coating her mouth becoming too much to bear.

“Now now, hush, sweetie.” Nightmare wrapped a hoof around Luna’s head and pressed her into the dark fluff of her chest. “Do you want your baba now?”

“Yes,” Luna said, voice cracking from shame.

“Yes what?” Nightmare’s eyebrow rose.

Luna gulped. “Y-Yes, Mommy.”

“Good girl.” Nightmare picked up the bottle, and brought it to Luna’s mouth. She eagerly parted her lips, ready to receive the amber nipple and start suckling.

“Princess Luna, what gives?!” A shout rang out from the crowd. The bottle stopped just in front of Luna’s face, and she whined. Looking up, she saw Nightmare’s face darkling staring down the interloper, so Luna turned to look to.

Rainbow Dash had stepped forward, shaking with anger. “This is… just a trick right? Or something? You gonna stomp Nightmare’s flank into the ground any second now, right?”

Luna frowned, not knowing what to say. Would Nightmare punish her if she responded? Would she not get her bottle?

Just then, the fog at Rainbow’s hooves leapt upwards. It latched around her face, forming a pacifier in her mouth and binding it with a strap around her head.

The shock on Rainbow’s face was so great that it looked like her eyeballs might pop free.

“Hmmphf?” She said. Instinct cause her to reach up with her hooves to try and remove the foreign object, but that proved to be a mistake. With her hooves chained together, moving them independently was impossible. She slipped and fell to the ground, muffled screams chasing after her.

Ponies all around her backed up in fright, though the closest--Fluttershy and Applejack--immediately moved to help her up.

Luna faced Nightmare again, ears folding down in fear. Luckily, Nightmare’s dark face was back to feigning cheer. “Now then.” She shoved the bottle into Luna’s lips.

“Mmf!” Luna said in surprise. That quickly faded, in favor of wrapping her lips around the nipple and suckling.

Warm, sweet milk splashed into her mouth. The gross leftovers from her breakfast were dispelled, and once again Luna was left with the happy sensation of suckling and the wonderful reward it yielded.

Drinking from her bottle was so euphoric, that Luna even forgot about the massive mess in her diaper. For a moment.

She didn’t even mind when Nightmare’s hoof found her ponytail and started innocently twirling it. Luna just buried her cheek into the comfy chest fur and let her eyes go half-lidded.

She ignored the crowd’s stares and murmurs, and the muffled screams of Rainbow Dash. Right now, her baba was all that was important. It was the one good thing she had in what was quickly becoming an ocean of terribleness.

Then, the bottle was suddenly pulled away from her mouth. Luna whimpered as drops of milk hit her lips. She saw that the bottle still had half of the formula still in it, and desperately turned to Nightmare, demanding an explanation.

The bottle merely faded away, as Nightmare had her attention on the sky. Luna was confused for a moment, but when she followed Nightmare’s line of sight, her relaxed state evaporated.

Not far away, she could see Celestia’s chariot descend

Her face paled, and Luna’s heart started beating faster. Her sister was here!

Relief and concern flooded her. Celestia had finally found them, which meant they might all be saved! ...Might.

Nightmare’s power, along with the fog that basically controlled this town, was a dangerous threat. Not to mention the last time Celestia had defeated Nightmare, she’d needed the Elements of Harmony. This time, that wasn’t an option. And she had the handicap of an entire town being hostages.

Luna squirmed, hating how she was squashing her own hopes for freedom.

The chariot descended behind the crowd of ponies, how by now had all turned to witness the arrival of the Princess, some even cheering.

Luna felt herself rolling over suddenly, until her belly was on Nightmare’s lap. The fog right below her climbed up to her mouth and formed a pacifier between her lips. Despite her surprise, she knew better than to try and spit it out.

Nightmare patted her head gingerly, which made Luna worried. Her captor didn’t seem all that concerned that the cavalry had arrived. In fact, she seemed pretty calm.

The crowd was parting now, some ponies applauding as Celestia approached.

Luna suddenly panicked, realizing her sister was about to see her in the most compromising situation she’d ever been in. She tried flinging herself free of Nightmare’s lap, but magic kept her in one place pretty easily.

That didn’t stop Luna from whimpering though. And squirming. She did everything she could to push against Nightmare’s power, not caring about the consequences. No matter what, she couldn’t let her sister see her so… beaten.

“Oh, calm down, Lulu.” Nightmare suddenly pressed her hoof deep into Luna’s dirty diaper.

The dolled up alicorn froze, before a long, slow shiver ran through her body. The poop in her diaper shifted and squished noisily, spreading all over her backside.

And then Nightmare started rubbing. Slowly and deliberately, up and down. Luna’s faced flushed, burned, and exploded with redness. She kicked her hind legs in protest and whimpered, but that didn’t stop the rubbing.

Finally, Princess Celestia broke through the crowd. She was flanked on both sides by only a few guards. She must’ve come hoping to end this quickly, and as such hadn’t brought an entire army with her.

That was a mistake.

Celestia herself wasn’t paying much attention to Nightmare, another mistake. Instead, she seemed more focus on soothing the citizens. Though Luna couldn’t quite make out what she was saying, she could tell her sister was talking to the denizens of Ponyville, offering assurance and compassion.

Either she was overconfident, or blissfully unaware to the danger presented.

Luna was just glad she hadn’t been seen yet, even if the inevitable was only being delayed. She still tried in vain to wiggle away, but Nightmare only seemed to press deeper as she rubbed the butt of Luna’s dirty diaper.

The overwhelming stench of her own mess made Luna’s eyes water, but part of that could probably be attributed to shame. Even if her sister didn’t see her soon, she would surely smell her. Either way, the last sliver of Luna’s dignity wouldn’t survive for long.

As if on cue, Celestia turned to them, her warm face transforming into an angry glare. “Nightmare Moon, you have--” She crashed to a stop, finally noticing her sister.

Luna whimpered, squeezing her eyes shut. Even so, the image of her sister’s face was burned into her retinas.

Her widened eyes juxtaposed by shrunken pupils, her dropped jaw that had been on it’s way to hit the ground, her nose crinkling at the nasty stench of Luna’s diaper, and the twitch that plagued both her eyelids and her ears.

What made matters worse was that Nightmare refused to stop fondling her dirty diaper. If it already hadn’t been blatantly obvious Luna had been dominated into submission, the slow, deliberate rubs against her mushy butt only made it clearer.

“L-Luna, what happened? Why are you… how… what?!”

Luna squeezed her eyes shut, wishing her mane wasn’t tied back in ponytails so she could hide her face behind it. After a few seconds of wishing she didn’t exist, Luna felt a hoof pat her head and she tentatively turned to look at Nightmare Moon.

“Come now, Luna. Why don’t you answer your big sis?” Nightmare grinned mischievously. “Tell her all about why you’re in diapers."

Luna sniffled. “I no wanna,” she whispered through her pacifier.

Nightmare’s hoof suddenly slammed deeper into Luna’s diaper, causing the poor mare to shiver and ‘eep’ with surprise. Nightmare calmly but her mouth to Luna’s ear and coldly hissed, “I won’t ask again.”

Biting down on her pacifier, Luna nodded slowly, sniffling. She turned to face Celestia’s aghast expression as a new wave of humiliation crashed over her.

“I…” Luna sniffled, barely fighting back any more sobs. “I hadda ac’ident, so Mommy put me in diapees.”

Her face muscles contracted in a painful wince the second the sentence left her mouth. The fact that she had said that would’ve been humiliating enough on its own, but what piled wasn’t even the town, or her sister bearing witness to it, it was that it came out so easily. It was like Luna really was the baby she was forced to pretend to be.

Celestia’s face compressed with worry, as well as a little disgust. Her nose wrinkled at the scent of Luna’s dirty diaper, but even more noticeable was the look she wore. It was clear that Luna’s answer had only raised about a hundred more questions.

Princess Celestia shifted her attention to Nightmare Moon, her expression. “I don’t know what you’ve done to my sister--”

“I diapered her, of course,” Nightmare interrupted. “Poor filly needed it too, if her mushy tushy didn’t already give that away.” She patted Luna’s dirty rear, eliciting another sniffle from the dolled up alicorn.

For just a moment, Celestia was taken aback, but shook her head and dug her hooves into the dirt. “You have no right to do this to the ponies of Equestria. Eternal night, enslavement, ...t-that…” Luna’s ears dropped. ‘That’ was pretty obviously meant to refer to her treatment, which was humiliating enough already.

Behind Celestia, the fog began gathering. It was pretty unnoticeable, but Luna had been dealing with the fog for quite some time and recognized it immediately. Nightmare was about to attack.

“Cel--” Nightmare suddenly snapped Luna’s mouth shut with magic. Her lips clamped over the pacifier, as the dark forces controlling her body forced her to suckle innocently without so much as a muffled cry.

“Nightmare, I’ll be sure you pay for this!” Celestia yelled.

“Hmmph,” Nightmare said, thoroughly unimpressed. “Seems like you’re a tad cranky. How’s about I get you ready for naptime?”

Celestia’s resolve shattered into confusion with a single look. “Uh… naptime?”

Luna kicked and struggled, but it was too late. The fog shot out from the ground as five distinct tendrils. Four wrapped around the guards, so fast they didn’t even have time to react. Celestia managed to turn around and gasp before her tendril engulfed her.

“MMMMMPH!” Luna screamed, still unable to stop suckling. She watched as her sister and the guards struggled in their foggy prisons, their silhouettes difficult to make out.

The townsponies looked on in horror as their savior was blanketed with fog. Nightmare just cackled with delight.

Then, Luna felt herself being picked up. Before she could even react, Nightmare sat her--butt first--against the ground. Luna squeamishly shivered as her mess explored yet untouched areas of her diaper.

Feeling a tug at her neck, Luna looked to see her leash being pulled down. The fog at the ground formed a steel peg, embedded into the dirt. Nightmare swiftly wrapped the leash around it, ensuring Luna had nowhere to go for now.

Then she stood up.

At that instant, the tendrils of fog encasing the ponies before them vanished. All four guards dropped to the ground. Their armor had been stripped away, replaced now with chains. All of their limbs were wrapped in binds. Thick iron bands were clasped over their necks, with chains connecting to the ground. Their mouths all bore thick, uncomfortable looking muzzles.

Some looked around in panic, some screamed, but none could do anything.

And Princess Celestia had it the worse out of them all.

Her wings and horn were bound, that much had been a given. Her mouth now bore a massive purple pacifier, and given how forced downward her jaw appeared, the bulb must’ve been gigantic. Straps from the pacifier wrapped around Celestia’s head, as well as over and under her snout, locking it down so she couldn’t speak. Her legs had escaped chains, but only for a far worse fate.

A stockade had been erected around her, keeping her neck and forelegs firmly in place. Her hind legs hadn’t fared much better, as a spreader bar kept them pushed far apart.

From Luna’s angle she could also see Nightmare had taken the liberty to diaper Celestia. A massively poofy pale purple diaper encased Celestia’s hindquarters. Pink ruffles ran down the butt of the garment, showing off just how dainty and foalish it was. And it showed that off right to the entire crowd of Ponyville.

“There we go,” Nightmare said with an evil gleam in her eye. “Almost ready for naptime.”

“Mmm?” Celestia tried to look around, but couldn’t escape the stockade to see properly. She did manage to lock eyes with Luna, who quickly turned her attention to the ground out of shame.

I should’ve tried harder to warn her. Luna thought. The realization that her last hope had been subdued slowly started to sink it. Luna almost didn’t want to accept it.

Celestia struggled against her new prison, wiggling her diapered rump to the tune of a crinkly chorus. Nightmare laughed.

“Now, now, isn’t somepony just full of energy?” Nightmare clicked her tongue disappointedly. “I guess I’ll have to tire you out before you can go beddy-bye.”

“Hmmph?” Celestia’s brow furrowed. Luna’s did too; she didn’t like the sound of that.

With magic, Nightmare lifted Celestia’s tail high into the air, ensuring her diapered plot was exposed for the captured and broken-hearted townsponies to see.

“I’ll know you’re all tuckered out when you can’t hold back your bowels anymore,” Nightmare said. “So I guess I just won’t be able to stop until your diaper is all full.”

“Sterp whurt?” Celestia struggled to ask.

Luna’s stomach sank. She knew where this was going.

Nightmare outstretched a hoof, and fog leapt up to accommodate her. Soon, a long, wooden paddle had formed in Nightmare’s grasp, and she grinned wickedly.

She raised the paddle into the air. Ponies gasped. Twilight cried out with a desperate, “please stop". The bound guards shook their heads, screaming behind their muzzles.

Nightmare shot Luna a brief glance, and winked, making the degraded alicorn shiver. Then the paddle came down.

CRACK!

It moved like lightning, but sounded like a clap of thunder. The paddle traced an easy path to Princess plot, delivering a vicious spank that snapped the wood in half.

Celestia screamed, her pacifier choking most of the sound. Luna tensed up, biting down on the bulb of her own.

She had never been on the receiving end of a spank that bad. Even with a thick, plushy diaper to cushion the impact, that had to have hurt.

Luna winced hard enough to make her cross her hind legs, and then just winced again as cold poop pushed to her inner thighs and beyond.

Nightmare brought back the paddle, letting fog reform the end. She casually glanced down at Celestia rear and shook her head. “No poopie yet? I guess I have to spank you some more then.”

A teary-eyed Celestia quickly recovered and tried to look over at Nightmare as she shook her head. “Nuh! Nu! Mmm mmm!”

Nightmare raised the paddle high, delighting in the situation. It was clear that, while humiliating Luna had been fun, breaking Celestia was what gave this evil mare life.

CRACK!

The end of the paddle snapped off again, and fell to the ground.

Celestia wailed, tears already streaming down her face. Townsponies were looking away now, covering their ears as best the could and slamming their eyes shut.

The paddle reformed, and rose once more.

CRACK!

Another clap of painful, painful thunder. Luna’s own rear stung just from the memory of receiving her spanks. She couldn’t imagine what Celestia’s plot must’ve been feeling just then.

CRACK!

Luna slammed her eyes shut as she heard her sister’s muffled sobs. It was too much to bear. One more and she might--

CRACK!

“Stop it!” Luna screamed. She burst onto all fours, ready to charge Nightmare. But not half a step in and her leash caught her, sending her face plummeting into the ground.

Luna bit down, grateful her teeth found the pacifier instead of her tongue. Her snout stung after hitting the dirt. She tried to sit back up to nurse it, but found the fog had grabbed onto her face and wouldn’t let her move.

Then she heard Nightmare’s slow, deliberate steps move towards her. Right up until her forelegs blocked Luna’s vision

“Lulu,” Nightmare said with all the anger of a scorned mother. Her magic let the paddle rest in Luna’s line of sight for a moment before letting it whish around to her backside.

CRACK! SQUISH~

The wind from the swing was strong enough to ruffle Luna’s skirt and brush her pigtails forward.

The pain was enough to make lose consciousness for a half-second.

Tears immediately leapt to her face, clouding her vision even before she could focus properly again. Nightmare’s scowl suddenly dominated her face.

“Do you want me to spank you again?”

Luna whined, in so much pain that she couldn’t even form words.

“I didn’t think so.” Nightmare’s voice was smooth, but darker than a barren night sky. “If you don’t want anymore spankies, then you better do exactly as I say. Am I clear, sweetie?”

“Y-y-y-y-yes… M-m-m-m-m-mommy-y,” Luna sniveled, hot tears working their way down her face.

“Good. Now, I’m going to go back over to you sister, and I’m going to keep spanking her until she’s filled her diaper up enough for it to touch the ground,” Nightmare said, voice dripping with the pleasure she would experience from the act, and also the hate she felt towards Celestia. “While you sit here like a good filly. And every time I spank Celestia, I want you to burst out in the cutest, happiest, foalish giggles you can. Understand?”

Luna was mortified, but slowly nodded.

“And if I think, even for a moment, that those ditzy little laughs aren't genuine, I’ll give you the same treatment as her.” Nightmare nudged her head over to a whimpering, sobbing Celestia. “Ok?”

Luna nodded again, quicker this time.

“Let me hear you say it.”

Luna shuddered. “Ok, Mommy.”

“Good girl.” Nightmare stood up, and used her magic to set Luna back into a sit. The poor mare whimpered as her stinging rear mest the ground, the pain only slightly alleviated by cushy padding and cold mush.

Nightmare trotted back over to Celestia. She raised the paddle again, though her attention remained on Luna.

CRACK!!

It was the loudest--and no doubt most painful--spank yet. Enough to force a muffled scream from Celestia.

Luna hesitated for just a moment, but then forced herself to laugh. She giggled as joyfully as she could muster

Her sister looked up, and locked eyes with Luna once again. Her face radiated anguish and surprise, as though she’d been betrayed.

CRACK!

Luna laughed again, tears of sorrow rather than pain leaking from her eyes. She clapped her hooves, hoping the noise generated by her booties would cover up the few desperate sobs she couldn’t hold back.

CRACK!

It seemed whatever will Celestia had been retaining up till that point had finally been shattered. Maybe it was the pain, or the humiliation, or just seeing her own sister laugh at her, but nevertheless something broke.

Between her cries, she grunted, pushing hard. Her diaper bulged suddenly, and sank a little, now tinted ever so slightly brown.

Luna laughed as hard as she could, almost choking.

Nightmare grinned, and set the paddle down for a moment. She turned to address the onlookers of Ponyville. “I hope you all have a good view.” Her voice boomed. “I want everypony to see what their precious princesses have become. They’re little more than pathetic, bumbling foals, who would poop themselves just to escape a little bit of spanking.”

CRACK!!!

The paddle whipped down again, this time splintering into hundreds of pieces but fixing itself just as quickly. Luna winced, but giggled furiously anyway. No doubt the slimey, warm goop Celestia had just dropped into her diaper had be spattered all over her rear now. The way her sister’s face twisted in desperation only confirmed this.

“But I’m not done with either of them just yet!” Nightmare continued. “Not by a long shot. I’m going to pay back my millennium of humiliation twenty-fold. So keep watching, because it only gets better from here.”

CRACK!

Luna couldn’t laugh this time. She knew she would be punished for it, but there was just no way to keep going without devolving into tears. Nightmare had won. Luna had let her win and dragged down all of Equestria with her. There was no denying her cowardice in the matter; the role she’d played in being so passive, submissive, and downright foalish.

As much as it pained her to realize, she felt like she deserved Nightmare’s punishment now. She’d earned it for being so pathetic.

Though her crying, her bleary vision managed to catch a glimpse of Nightmare Moon. And she looked angry.

Luna whimpered, knowing the promised punishment was coming. It was going to be a long eternity.

Author's Note

Well, this is the end of this fic. (For real, this time.)

But, I'm not quite done with this story. It's been a blast to write, and I would immediately give it a follow-up if I didn't already have so much on my plate. So, hopefully, once I've gotten through a few more of my ideas, I can revisit this concept with a sequel.

Until then, thanks for reading!