Moondiapers

Luna was exhausted as she dragged herself towards her room. It was a long night dealing with horrible and strange nightmares and all the princess of the night wanted to do was get some sleep. The princess opened her door she found herself looking upon her bed just wanting to plop on top of it and dig under the covers. But Celestia was sitting on top of the bed with a long slim smile painted on her face as she asked, “hello Luna how was last night?”

She yawned and stretched her wings, “it was really tiring with a lot of nightmares.”

Celestia cooed,”oh dear, well I have the perfect thing for you. Come on over here.” She lead Luna to the bathroom as the lunar princess eyed her sister thinking, “what is she up to? This better not be some sort of prank.”

They then entered the bathroom and there was a giant hot tub with various faucets. Celestia squealed in delight,”its your very own hot tub I had it installed last night!”

Luna looked it over amazed with it made of a dark blue tile and the knobs were shaped in crescent moons. “Wow it’s beautiful but what's the occasion?”

Celestia shrugged as she explained,”well I had one recently installed in my bathroom. I thought you should have one too.”

Luna eyed the tub and thought she’s being too nice...this has to be apart of some prank. She looked up at her sister with a glare. “This better not turn my mane pink or something.”

The princess of the sun laughed, “oh don’t worry it’s not a prank.”

Celestia went over and turned the knob furtherest of the right and steamy hot water poured from the faucet as she explained. “This one turns on the water and controls the heat.” She then started to turn the second knob and the faucet started pouring out a white frothy soap that spilled into the tub. “This one turns on the soft bath salts.”

Celestia then turned on the last knob and blue misty foam came out filling the tub as the princess explained, “this one is the best it fills the tub with frothy bubbles”

She filled the tub with a beautiful white colored water with a dark blue bubbles bubbling all over the hot tub. Celestia turned to her sister “I promise this isn't a prank now come on and lay down and relax.”

Luna gulped as she settled into the suds and sighed as she let the bubbles settle over her and she felt her fur soften underneath the bath salts and absorbing the soft scent of the bubbles. As Celestia then came over and started massaging her sister’s shoulders waiting for the lunar princess to drift off her exhausted body being soaked in the hot steamy water and suds. Eventually Luna was out snoring with her head drooping and that was when Celestia smirked and thought to herself, it’s time to change Luna into my big thick diaper!

Celestia’s horn glowed lifting the sleeping alicorn out of the tub and focused her spell onto Luna with tendrils of white wrapping around the princess of the night and engulfed the entire bathroom into a bright white light.

When Celestia opened her eyes she turned to see that where her sister was instead a giant neatly folded dark blue diaper lying on the floor. Celestia slowly got up and walked over to examine her work, the diaper itself has a big black crescent moon on the fold of the plastic with a sparkly star printed plastic on the top of the diaper for the tabs to stick on and there were dark violet leak guards decorating the sides of the diaper. Celestia couldn't believe that she created a diaper this amazing and one that was so magnificently thick. She lifted the diaper within her magic and caressed it to her face feeling her fur sink into the plush as a cacophony of crinkles echoed from the padding. This made her shiver all over caressing the padded fabric and feeling the thick booster underneath the plastic coat. The solar princess squealed “oh Luna you're a fully functional nighttime diaper!”

Celestia then took a whiff of the diaper and moaned as it smelt of a midnight rain. “Oh sister your perfect in every sense of the word.”

Celestia laughed taking the thick diaper over to the bed and started to slowly tape the padding over her rump. She started with folding it out on the bed seeing the insides were dark blue as well but very plump. She gently pressed a hoof into the padding and watched her hoof sink into the thick fabric. The princess of the sun was amazed as she has never felt something so soft in her entire life. Celestia then whispered, “so what Twilight said was true. That if you relax the pony your going to transform they’re softer and can absorb more urine.”

The princess smirked as she whispered, “now it’s time to put you to the test dear sister.”

She laid herself onto the bed and slowly laid her rump underneath the diaper. She moaned as her rump just sank into the diaper and she slowly and carefully folded the top of the diaper over the front of her crotch and taped the little blue plastic tabs over the sparkly black plastic landing zone hearing the entire diaper crinkle as it caressed her fur. She then got up from the bed and wiggled her rump seeing herself find her sister’s mirror she saw the big blue diaper hugging her with it’s big black crescent moon pressed right around her rump. She giggled wiggling her tush, “oh Luna your the perfect diaper. Now I can really enjoy my day off!” Celestia instantly lit her horn and disappeared in a poof of smoke.

Celestia Here everything was ready her bed was now a oversized crib with pink bars and her soft expensive blanket turned into a pillow foal style blanket with a big sun stitched into it. She giggled at how foalish it looked. “oh Tia you outdid yourself.”

Celestia turned to her door an waddled over (with the diaper crinkling loudly) checking to make sure the magical locks were on just in case, “don't need any maids popping in seeing their princess in a diaper.”

She then flew upwards and plopped in her crib staring up at a little mobile overhead with suns and stars. She then lit her horn drifting a big foal bottle filled with a thick white milk and she began suckling at it moaning with every suckle and kicking about in her big poofy luna diaper. She was so engrossed in this that she barely noticed as somepony knocked on her door and annoying stallion’s voice drifted through. “Princess Celestia..uh I don’t mean to disturb you I know it’s your day off. But, these nobles are quite vicious and they want to discuss the matter with you about plans for the grand galloping gala with you. ”

She groaned rolling her eyes and groaned as she forgot all about that stupid meeting “Alright Blueblood i'll be out in a minute.”

The mare then tried removing the sticky tabs with her magic but the tabs didn’t budge. She eyed her diaper and lit her horn trying to remove the tabs again. But nothing happened they stayed put firmly snug around her waist. She was now shivering looking at the padding. “I need to get this off me.”

She tried to remove the diaper with her hooves but the tabs were stuck on there like glue. She rolled around her bed trying to tear the diaper off with her teeth in cacophony of crinkling and ruffling of sheets when Blueblood knocked again and asked, “is everything alright in there?”

Celestia paused as she was curled up in her crib with a mouthful of diaper. She spat it out and stammered,“uh yeah just uh...getting ready.” She quickly jumped from the bed and flew to her closet thinking, “it's alright I just need to wear something to hide the diaper!”

She then took out a long elegant purple dress and dressed it around her making sure the diaper was securely hidden underneath purple fabric. Then she sighed, “there that should do it after I finish this stupid meeting I can find Twilight and find out what’s going on?”

But then she took a step a crinkle came out and she gulped then took another step… crinkle...she groaned slamming a hoof to her face, this stupid diaper is going to be so loud everypony at the meeting will hear it! She groaned trying to think of a spell to hide the sounds but nothing came to mind then Blueblood knocked again “please Celestia hurry up!”

She rolled her eyes and flew to the door opening and staring at her nephew with a cold glare., “Alright alright!”

She continued along with the prince as they went past many guards and servants going about their duties and the faint crinkling sounds from her diaper perked some ears. But the ponies looked around not being able to trace the source of the sound. Celestia sighed in relief and continue her gentle stride all the way to along board room filled with canterlot nobles. The princess was so happy about how well she hid her diaper that she was careless and plopped on her seat then came a loud wheezing sound and everypony turned towards her with wide eyes. Celestia blinked and blushed,”uh..sorry...um...my...uh chef told me I should..uh eat more beans.”

The stallions all chuckled while some scoffed at her un-princess like fart. Fancy Pants was at the other side if the table who cleared his throat and began, “well no matter i’m glad you’re here. Now we can get on with the plans for the grand galloping gala.”

Celestia sat there for hours listening to proposals and accepting them and denying them when she felt a ping in her bladder the small urges to pee but she knew she couldn't go with Luna still strapped around her rump. Not only that she moved every so often making the diaper crinkle but as before with so many ponies talking nopony picked up the sound or disregarded it. She then heard a stallion propose. “Now princess I have many selections of fine wine for the gala would you mind taste testing them?”

Celestia groaned knowing she was already feeling the need to pee and was not in the mood for more liquids. But she consented grumbling “lets just get on with it.”

A butler brought in a tray with several glasses of wine. Celestia took each glass one by one and drank them she scoffed at a few glasses preferring the sweeter wine and declared her choices. But then another noble came up, “thank you princess, can you try my punch as well? I know it’s not wine but it’s still necessary for the success of the gala.”

Celestia groaned now feeling the urge even more but consented seeing she wanted to get this over with. Celestia was given a glass of punch she sipped it and nodded,”yes it's fine, now now move..”

But another noble came up, “um sorry but I was told we will be serving some liquor at this year’s gala. I thought you may try a sample of the whiskey I distil.”

Celestia rolled her eyes as a glass of whiskey was given to her she drained it slamming the glass on the table then declared,”its great now is there anything else?”

Fancy pants continued, “yes as you know the budget is complete, the activities finished, and guest list ready soon we’ll be handing out the ti…”

Then a hissing sound echoed throughout the chamber. Every noble in the room slowly turned their heads towards Celestia who blushed as she stayed perfectly still despite feeling a warm wet sensation fill her crotch. She was sweating and gulped as she explained, “oh that’s just the uh...pipes. in the walls.”

Fancy pants gulped and pointed, “Celestia...y...your dress is glowing.”

Celestia eyed him and looked down gasping seeing that on the bottom front of her dress was a faint glow. She squealed as she move her legs feeling the urine around the crotch of her diaper. She quickly got up with a loud squelch emanating from her diaper which caused every stallion to look her direction she stammered,”I uh..it..it’s a alarm! I have to go!” She quickly ran out of the hall with the loud squelching following behind.

Celestia found the nearest bathroom and shut herself in gasping “how in the hay could this have happen to me!”

She then took off her dress with fury and turned towards the sodden diaper strapped around her waist and shouted,”Luna your getting off me if you like it or not!”

She then rolled on the ground as she lit her horn tugging and struggling to remove the padding then she flipped upside down to see Twilight Sparkle blinking in surprise. Celestia’s face turned a deep red. “Uh...twil..Twilight. Uh…”

Twilight looked at the dark blue diaper with the fading crescent moon on the front and whispered,”is..is that Luna?”

Celestia nodded as she got up and explained,”yes please you have to help me. For some reason she won’t come off me! I tried everything.”

Twilight looked the diaper over and giggled, “oh my you’re soaked,” Celestia rolled her eyes, “thanks for the observation Twilight but can you help me?”

Twilight tapped a hoof on her chin then asked,”lay down for me.”

Celestia squeaked ”Twilight that’s not necessary.”

Twilight blushed,”uh..well I never came across this problem before but as you know the diaper will reflect the pony’s personality. Now Luna here is clearly a diaper mostly used for nighttime use only and if i’m not mistaken foals move around alot at night. So to prevent their diapers from falling off some brands have a simple lock spell that makes it impossible for the foal to remove the diaper. In that case…”

Twilight simply removed the tabs of the diaper and opened it. “Then anypony besides the wearer should be able to open it.”

Celestia face was now just red with her student standing over her former teacher with a open used diaper like a foal. Twilight then poofed a box of foal wipes and cooed,”Alright hold still.”

She made quick work wiping her rump clean then taking the diaper within her magic and zapping it removing the moisture and turning the diaper back into it’s clean folded unused state. Twilight asked,”now I assume you don’t want this back on?”

Celestia sighed,”no Twilight the spell should be wearing off in a hour as I set it for three. I just wanted to have a little fun. But I forgot about a meeting I scheduled for preparations for this year’s galloping gala. “

Twilight blushed,”oh wow..well we still have an hour…
“
Celestia shook her head, “sorry but im done ill just release the spell when i’m back in luna’s room.”

Then they heard the door opening and Twilight and Celestia both turned with surprised looks as Twilight lit her horn poofing the dress on Celestia and the diaper strapped around her teacher’s rump making her squeal feeling the padding hugging her flanks again. Then a maid came in with a mop and bucket blushing. “Oh uh sorry you two still need to use the bathroom?”

Both princesses shook their head, Twilight replied,”nope all done, were just uh finishing up.”

Celestia just gave a sheepish smile,”yes thank you.”

The two alicorns both quickly filed out of their bathroom with the maid turning at the odd crackling noise. The two gasped as they continued walking and Twilight whispered ”sorry I didn't know where else to hide Luna.”

Celestia whispered,”it’s okay let's just get back to Luna’s room.”

She lit her horn and was about to transport the two when a big brown coated earth pony chef came running towards them shouting. “Celestia! i’m so glad I caught you.”

Celestia gritted her teeth and and growled, “yes?”

He blushed and ground a hoof into the floor as he explained,”well I just finished making you a cake for your day off and I just want for you to uh taste it first.”

She sighed “alright I guess I can do that.” Twilight blushed as Celestia waddled off with the chef.

Celestia was sitting down in the royal dining room trying to make as little crinkling with her diaper as possible. with the chef bringing the cake down in front of her. The cake was huge covered in thick white frosting with pink roses made of frosting lining all around the cake. He sighed,”i'm trying to make the perfect cake for your birthday this is just a prototype.”

She sat down slowly at her seat not wanting to repeat the mistake she made at the meeting with nobles and was given a plate with a single slice. Celestia took up a fork and knife and ate a bite and blushed at how soft and creamy it was. The mare couldn't help herself as she devoured her first slice and whispered. “In the thousand years of being a princess th..this is the best cake I have ever tasted!” The chef smiled proudly as Celestia took another piece from his masterpiece he proclaimed, “go on have as much as you want ! It's your day off.”

Celestia forgetting all about her diaper dived into the cake eating slice after slice not releasing the pressure starting to form in her bowels and she squeaked holding her gut. The chef became concerned, “Celestia are you alright?”

Celestia gulped with sweat pouring down her face. “I...I uh it’s amazing really i’m fine...I...I.. just need to find Twilight.” She quickly got off her seat and waddled off as fast as she could.

Celestia went down the halls with the pressure in her bowels growing with every passing second. Celestia eventually found the princess of friendship in the throne room with Prince Blueblood, she was explaining something to him. “Now I don’t think you can just declare your birthday as a national holiday.”

Prince blueblood stomped a hoof as he pouted, “And why not?”
Twilight rolled her eyes. “Again what did you do to help Equestria? Did you save it ? did you invent something important? Did you do something heroic? Just because your a prince doesn't mean you just get a holiday!?”

Celestia waddled over and gulped “wha..wha do I say? I have to speak in code something that only she can understand.” The pressure in her bowels made her skip over and prince Blueblood scoffed,”my goodness what is that crinkling noise! I’ve been hearing it all day!”

Twilight turned towards the princess and asked,”uh Celestia...you done with the cake testing?”Celestia nodded her face rapidly as she bounced a little the purple alicorn feeling something was wrong persisted,”uh..is something wrong?”

Celestia gulped and asked, ”Twilight..Luna needs you...she’s uh going to uh...make a mess.”

Twilight’s face turned white and got the message. “Okay Blueblood we can continue this conversation later.” She took Celestia by the hoof and shouted,“alright come on!”

She lead Celestia away as Prince Blueblood scratched his face. “What is going on and what is that crinkling noise?”

The two were almost at the bathroom with Celestia face brightening up at the sign of a mare on a door, I never thought in all my years how relieved I am to see a bathroom!”

Then Fleur came out and she giggled. ”oh princess Twilight, princess Celestia how are you two doing?”

Twilight asked,”hey Fleur uh were just using the bathroom.”

Fleur looked at them what Celestia now gently moving on her back legs. She eyed them“ together..is there a secret club or something?”

Celestia gritted her teeth. ”No just need to go really bad move out of the way please.”

Fleur moved out of the way. “Why of course but uh could I borrow Twili…”

Before Twilight could answered Celestia growled,”no she can’t I need her!”

Fleur paused looking at Celestia with a surprised look ,”uh...but why?”

Twilight gulped, “I..uh ...just need to...uh help Celestia with..looking for a horn ring she had she thought she lost it in the bathroom and needs my help to find it.”

Fleur smiled as she replied,”oh well how about I help look for the ring as well you‘ll find it alot faster with a extra pair of hooves.” Celestia wanted to scream at Fleur feeling her bowels about to burst.

Twilight squeraked, “oh no were fine you go on I promise i'll catch up.” Fleur nodded and was going to leave when Fancy Pants came by laughing “oh there you are darling seems like I had to use the little colt’s room as well as they say.”

Then a rancid smell emanated outwards as it engulfed the area. Fancy Pants gagged putting a hoof to his face. “My word what is that smell!?”

Twilight turned to Celestia with a horrified expression and she was nearly going to burst into tears but Twilight quickly stammered, “uh...I bet a pipe burst or something you two go and get some plumbers! We’ll see what we can fix!”

Fancy Pants nodded in agreement wanting to get away from the smell gagging. “Right away come darling I think I saw a plumber near the fountain outside.”

The two quickly ran off as Twilight lead the humiliated princess of the sun into the bathroom.

Twilight was quick in getting rid of all traces of Celestia’s mess from both Luna and her body wiping her down and poofing the diaper into its clean stated then when finished Celestia instantly teleported herself and Twilight into Luna’s room shouting “I am never ever doing this again!”

Twilight giggled , “I mean look at the bright side nopony noticed...I mean you just pooped in a diaper in front of Fancy Pants for crying out loud!”

Celestia thought for a second and burst into laughter as she sighed,”yes Twilight it was a experience, but it’s one I rather not repeat. Let’s get Luna back into the tub.”

They quickly settled the clean crisp diaper into the sudsy steaming water and Celestia instantly shot her hron turning the padding back into the princess of the night still deeply asleep. Celestia smirked, ”she didn't notice a thing.”

Twilight nodded as she explained, ”the spell I learned removes all traces of foreign elements on a piece of clothing. Trust me she’ll never know what happened.”

Celestia sighed, ”okay then maybe we should stop using that spell. I mean I almost humiliated myself in front of all the nobles of Equestria.”

Twilight blushed and ground her hoof.“Yeah this spell is stupid..may...maybe we can use it just one more time…”

Celestia eyed her and asked, “For what?”

Twilight gulped then looked up and asked, “maybe for a foal style sleepover?”