Author's Note

(WARNING!: Make no mistake this IS a padded pony fic! And as such as it will contain content that some readers will find disturbing! If you are uncomfortable with the idea of ponies in diapers, please click elsewhere and DO NOT, I repeat DO NOT READ!

For those who choose to stay, expect to see the following:
Diapers - Heavy
Ageplay - Heavy
AB/DL Themes - Heavy
Diaper Usage (Wetting) - Medium
Diaper Usage (Messing) - Medium
Implied Diaper Usage (Wetting and Messing) - Light to Medium
Breast Feeding - Medium)

Prince Ecosis announced back in 2018 that Princess Luna was going to be the next character in the original fanfic, and even approached me through PM with suggestions. But that was the last time he (or she) provided any updates on the fic. Using what information I was given, I've decided to continue it, starting with who was confirmed to be next.

The "Sex" tag was in the original, and since I'm including breastfeeding like in the original I decided to keep that tag just as a precaution. There's nothing explicit in this fic, the intention is not for it to be sexualized.

I'll lay down the ground rules for who can be voted on next time, seeing as there's going to be two chapters right out of the gate and I already have decided who will join Twilight next. In the meantime, I hope you'll enjoy Twily and Lulu's playdate. And be sure to check out the original fic if you want to better understand how this contiuation is supposed to work.

Little Lulu (Princess Luna)

"Twily, wake up," Princess Celestia called to the sleeping padded alicorn in that motherly tone of voice. "I have a surprise for you."

Twilight was already surprised to be woken up by the sound of Princess Celestia's voice rather than feeling something brush against her, hearing something, or even smelling something. That had always been the case whenever the sun princess had surprised her in the past. What could the surprise be this time? Was it another unannounced playmate?

Her eyelids slowly fluttering open and Smarty Pants clutched firmly in her hooves (she could never get to sleep without her foalhood doll by her side when she was padded up), Twilight sat up in her bed. Soon, she found herself face to face with an alicorn that was actually smaller than her. The alicorn had a dark, grayish blue coat and a very light blue mane and tail that did not flow. Said alicorn had moderate cyan eyes, and a black patch on their flanks where their cutie mark was: A crescent moon.

Twilight let out a gasp as she gazed upon the alicorn (who was also wearing a diaper)! She remembered seeing this alicorn before, albeit only briefly in this smaller state. "Princess Luna?!" She commented in amazement!

The filly sized alicorn blushed, her diaper crinkling as she tried in vain to block it from view. It took her a moment to find the words she wanted to say. "Indeed... Twilight Sparkle, it is I. My sister has... volunteered me to be your next... 'playmate' as it were."

"Why are you so small?" Smarty Pants asked with a giggle. "Aren't you supposed to be... taller?"

Princess Luna's blush deepened and she seemed to shrink from Twilight's gaze. "Apparently, my sister," She looked to Princess Celestia with what seemed like a glare. "Decided it would be best if I were to be more on your level. As she put it, she felt that 'Twily' would appreciate being a 'big sister' for a change."

Princess Celestia seemed to be struggling not to snicker. "Oh come now, Lulu. You could use a break."

Luna snapped and shouted! "DON'T CALL ME LULU, TIA!" She only realized after the fact that she had used her "Royal Canterlot Voice" to make that statement, as was evidenced by the fact that Twilight was covering her ears (and had covered Smarty Pants' ears for good measure). Turning back to Twilight, she apologized. "Sorry, I didn't mean to be so... loud. I'm just not exactly thrilled with all of this."

"It's okay, I don't think any lesser of you for being in diapers," Twilight replied with a childish giggle. "Besides, I like you more this way. You're more... fun sized."

The night princess' blush returned with a vengeance. "Well, don't get any ideas, Twilight Sparkle. It is only for tonight. Tomorrow, I will be back to my normal alicorn size and I will be out of diapers," Then she vowed. "And for the record, I have no intention of using my diapers as a toilet. I am perfectly capable of using the bathroom."

"Aw, come on, Lulu," Smarty Pants encouraged. "What's wrong with using your diapers? Isn't that what they're for? With them, you can have a bathroom anywhere. And you don't even need to clean up afterward, you can get somepony else to do it for you."

Luna only shook her head from side to side. "Perhaps you and Twilight are okay with using your diapers for number one and number two, but I for one am not. I am still a princess, and a princess does not pee or poo herself. After all, I must set a good example for all my subjects, especially the little ones."

Celestia only replied with a smirk. "Oh, but Lulu, you're not a princess tonight. You are little Lulu, Twily's new playmate."

Just then, a thought struck Twilight and she inquired of Princess Celestia. "But if Luna is here, who's watching over the dream realm? Is it going to be you, Mommy?"

The sun princess smiled even as she shook her head. "I very well can't leave you two foals unattended, even within the castle. What kind of a mommy would I be if I did that?" And she explained. "I temporarily granted Cadence the power to enter the dream realm, and Luna left her a detailed list of what to do and what not to do. I'm sure my niece can manage by herself for one night."

"Oh, that's good," Twilight breathed a sigh of relief. "Now I know I'll have somepony watching over me even while I sleep, making sure I don't have nightmares."

Celestia nodded. "Indeed," Then she approached Twilight and pressed a hoof to her fellow alicorn's diaper. "Now, we'd better get you changed. You haven't even noticed that you've already soaked yourself in your sleep."

"Huh?" Twilight blinked as she felt her diaper compress and crinkle, admitting a familiar squishing sensation as it did. Now it was her turn to blush. "Lulu!" She exclaimed in a childish tone of voice as she eyed the shrunken night princess. "Why didn't you tell me I'd pee-peed myself?"

"You mean, you hadn't already noticed?" Luna blinked in surprise. "I thought for sure you knew. Your diaper was so wet, I could see the damp patches from a mile away."

Princess Celestia simply lifted Twilight up using her magic. "It's alright, Twily. That's why Mommy's here. I'll get you changed so you don't get a diaper rash. We wouldn't want your night with little Lulu to be spoiled," And to her sister she then instructed. "Now Lulu, you remain here. And remember, if you need anything, you just have to ask me."

Luna pouted and folded her hooves across her chest as she sat down on her diaper. "Whatever."

Twilight giggled as she was then carried across the bedroom to a secluded area, that way Princess Celestia could change her diaper in private.

By now, the art of diaper changing was very much second nature to Celestia. Quick as a flash, she had pulled Twilight's soggy old diaper out from underneath her, wiped her now bare bottomed student's flanks clean, strapped her up into a fresh diaper, and then sprinkled in a generous helping of foal powder. Then she lifted Twilight into the air while disposing of the old diaper in the trash, before setting the padded alicorn back down.

"Thank you, Mommy!" Twilight happily hugged the sun princess, delighting in the warm feeling and hearing her fellow alicorn's heartbeat. She didn't even appear concerned that she had supposedly wet herself without knowing or realizing it.

Princess Celestia couldn't help but find that odd. "Twilight's always been aware of whenever she goes potty in her diapers," She thought to herself. "Did she really not know she'd wet herself in her sleep? Or did she know and she was just pretending not to notice?" Quickly, she shook her head to dispel such thoughts. She was probably way overthinking it, it was probably just a sign of how well Twilight was adapting to her role. Foals didn't always know when they'd wet or messed themselves, and it seemed that Twilight had chosen to emulate such a mentality.

Twilight, for her part, just happily waddled away as her spotless diaper swished and crinkled with every step she took. She didn't have a care in the world, she was just happy to be clean and fresh again.

The two alicorns soon returned to where the small in stature Princess Luna was, still sitting in that pouting posture as she hadn't moved an inch. Next to her sat Smarty Pants, the old doll hadn't budged an inch from where Twilight had left it.

"Took you long enough." Luna frowned with impatience.

"Now Lulu," Celestia motherly scolded her shrunken sister. "You must have patience. Mommy had to make sure Twily was all nice and clean so she wouldn't get a rash."

"Besides," Twilight happily pointed out as she trotted over to Smarty Pants. "You could've talked to Smarty Pants, she's a great listener. You can tell her anything."

Princess Luna saw fit to ask. "You really have an attachment for that doll, don't you? My sister told me about that little 'incident' you had with it a few years back."

With a raging blush on her cheeks, Twilight picked up Smarty Pants and hugged the doll tightly. "I didn't mean for things to get so out of hoof, really. It was just supposed to be a harmless little spell."

"Yeah, except for when it made everypony in town fight over me!" Smarty Pants grumbled. "And then I had to spend months as a chew toy for Winona before you convinced Big Mac to let you have me again. You're lucky he knew how to fix me."

Twilight whimpered. "Smarty Pants, we've been over this. I already apologized."

Luna then apologized. "I'm sorry, Twilight. I didn't know your bond with the doll was so strong."

Twilight giggled as she corrected. "You're supposed to call me Twily, just like you have to call Mommy Mommy. That's how this works."

Smarty Pants chimed in. "Yeah! It's like being in a play. You gotta get into character and play your role."

The night princess frowned anew even as she reluctantly relented. "Fine then 'Twily', I suppose I'll let you decide what we do tonight."

"Wait, it's night time?!" Twilight gasped as she rushed to the nearest window to confirm her suspicion! Sure enough, when she gazed out of the window she could see the moon had already risen and the stars were lighting up the sky.

"Surprise!" Celestia declared. "Since my sister is usually asleep during the day and active during the night, I figured it would be nice to have a playdate at night for a change. You and Luna can spend the night together."

Twilight began bouncing up and down in excitement! "You mean, we can stay up past bedtime?!"

The sun princess gently nodded. "Just for tonight, my little ponies. And you can't stay up all night long. If I let you do that, you'd both be cranky in the morning. And nopony likes a cranky foal."

"I would be fine!" Luna insisted as she puffed out her chest. "Just give me a good cup of coffee and I'd manage."

Twilight gasped as her eyes seemed to go wide! "Lulu, Mommy says that coffee's bad for foals. It's like eating too much sugar. We're not allowed to have it."

"But I'm not..." Luna began, only to see the disapproving glare from her sister and relented. "Fine, I guess maybe I could be without coffee for one day," And then she turned to Twilight. "So, what should we do first tonight? The night is still young."

"Ooh! Ooh! I know!" Twilight happily exclaimed! "We could play board games together! And Mommy and Smarty Pants could play too!"

"What a great idea, Twily," Princess Celestia agreed as she used her magic to float over several different board games in brightly colored boxes. "Luckily, I made sure to plan ahead and get all the best boardgames I could find," She set them all down on the floor in front of the padded alicorns. "Go ahead, pick whichever one you like. Just be sure to leave the setting up to me. That's what grownups are for."

In no time at all, a board game was chosen from the collection and set up. It was a really simple board game, you placed your pieces on the board and your opponent did the same with their board. Then you took turns calling out spots on the board, with the goal being to find all of your opponent's pieces before they found all of yours.

Twilight happily sat on her padded flank, Smarty Pants close at hoof. Together, they discussed where the best hiding places for their pieces were, and where they should try to look in the hopes of finding Luna's pieces.

Luna, for her part, just impatiently set her pieces on the board with little to no thought given as to where they should go. "Are you ready to begin, Twily?" She called, trying her best to throw her voice to sound more... childish for lack of a better term.

Twilight was too absorbed with talking to Smarty Pants to pay any attention to Luna's comment. "You're right, Smarty Pants," She said with a grin. "That is a good hiding place. Lulu will never think of looking there."

"Well, I can't help it if I'm good at the game," Smarty Pants boasted. "Whenever we played together, I'd never lose a game unless I lost on purpose. But you're smart too, Twily. I've seen the clever hiding places you used when you used to play this game with your family."

Luna called again, "Twily, are you ready to begin? I don't have all night to wait, you know."

"Just a moment, Lulu," Twilight replied to her fellow alicorn, and after a moment of hesitation and deliberation, she set her final piece down on the board. "Okay, ready!"

The shrunken down night princess sighed in relief. "So am I!" And she insisted. "I'll go first," Clearing her throat, she scanned the top of her board and made the suggestion. "Uh... Cloud Nine."

With a cheeky grin on her face, Twilight said in response. "Nope, you missed. Now it's my turn." But it seemed like it took her a very long time to decide what to do. In a sense, she seemed almost... distracted for lack of a better term: Distracted talking to Smarty Pants, distracted looking at her own pieces, even distracted poking at her diaper with a hoof.

It was only when Smarty Pants called out "Uh, Twily?" that the padded alicorn seemed to realize she was holding up the game.

"Oh, sorry," Twilight sincerely apologized and cleared her throat. "Sky Seven."

Luna looked at her board, and after doing so a small frown formed on her face as she declared. "You zapped my weatherpony. You get to go again."

"Okay," Twilight happily replied and without hesitation she asked. "How about Air Ten?"

"You found my seagull. Go again." Luna replied even as her frown deepened.

Happily clapping her hooves, Twilight proclaimed! "Oh, this is easy! Smarty Pants was right!" And she issued another call: In short order she found all of Princess Luna's remaining pieces. The night princess had been defeated after only taking a single turn, and she hadn't been able to find any of Twilight's pieces.

Luna's luck didn't improve for any of the other board games she and Twilight played: They played one where you had to be the first to get your piece to the end of a board with colored tiles, one where you moved your pieces around the outside of a board to try to make it to "home", and even one where you had to solve a mystery by using clues given to you (and keeping track of clues shown to you by others). No matter what the game was, however, the night princess couldn't win. At best, she might get close, be a few turns away from winning. But a victory eluded her in all the games.

So it was that Princess Luna eventually proposed. "Can we do something else, Twily?"

"Like what?" Twilight asked after the fifth boardgame of the night was finished.

The shrunken down alicorn then suggested. "Well, why not watch a movie? We could even camp out together, set up a tent."

Princess Celestia smiled. "I think that's a wonderful idea! Luckily, I know of the perfect movie for the two of you! It's not scary, so I don't have to worry about it giving you nightmares."

A short time later, Twilight and Luna had managed to hastily erect a small tent made out of pillows and blankets. Alongside Smarty Pants, they nuzzled together inside of the tent as their diapers crinkled in unison.

Princess Celestia got a projector and a screen to project the images onto it. For snacks, she set a huge bowl full of applesauce down on the floor in front of the two padded alicorns.

Soon, the projector had a film reel placed into it. And as the lights were dimmed, a picture began to be displayed on the screen, accompanied by sound.

As it turned out, the movie was an old Power Ponies film from way back when. In fact, it was so old that it was mostly in black and white. The characters spoke very little, for the most part the music and visuals told the story.

Still, a movie was a movie. And Twilight and Luna watched every scene as it unfolded, occasionally dipping their hooves into the applesauce and licking said applesauce off their hooves.

Yet, try as the padded alicorns might to stay engaged, the time was catching up with them as the movie went on. It was hard for them to stay awake as their eyelids began to droop. However, they were able to fight off the urge to sleep long enough for the movie to end. An announcer declared: "And so, once again the day is saved, thanks to: The Power Ponies!" There was a flash of color as the Power Ponies' logo was displayed on the screen, and then the screen faded to black as the credits began to roll.

Princess Celestia turned off the projector a moment later, removing the film reel and putting the screen away. "Well, this has been a very enjoyable sleepover," She declared in a motherly tone of voice, before clapping her hooves. "But now it's time for all good little ponies to go to bed."

"Aw, but Mommy," Twilight playfully pouted even as she let out a yawn. "We're not tired. Lulu and I wanna stay up even later."

"Yes, what Twily said." Luna found herself agreeing.

Celestia chuckled as she effortlessly picked up the two alicorns with her magic (and picked up Smarty Pants too for good measure). "So, you're not sleepy yet? Well, I think I know what will fix that." She carefully deposited the two onto the bed that Twilight had been using since coming to Canterlot. Then, she sat down next to them and lifted up her wings to expose her underbelly.

Immediately, Luna's eyes widened in disbelief! "Sister! You're not actually going to...!"

"Growing foals need their nutrition," The sun princess insisted as she watched Twilight slowly scoot over to her, the padded alicorn wrapping her mouth around a teet as she began to suckle. "Go ahead, don't be shy."

"No thanks!" Luna protested with a gag face. "You are not our mother! I do not need breast milk! If you wish to breastfeed Twilight, that's one thing. But you won't do it with me."

Princess Celestia frowned, but reluctantly decided it best not to press the issue. "Oh well, more for Twily, I guess," And then she looked down to her charge and whispered. "Don't drink too fast now, Twily."

Twilight simply concentrated on timing her suckles to the rhythm of Celestia's heartbeat as she closed her eyes. The rich, creamy taste felt so refreshing to her parched throat. She almost didn't want to stop at all, yet she eventually felt herself be nudged away by a hoof from her fellow alicorn.

Celestia proceeded to pat Twilight's back, and Twilight responded by letting out a hearty belch. Luna watched the whole thing in amazement, surprised at just how much Twilight seemed to be immersing herself in the role of being a foal. It was like she truly believed Princess Celestia was her mother. Was it all just an act?

Well, the night princess didn't have a chance to dwell on the thoughts for long as she felt herself growing sleepier by the second. Yet as she began to close her eyes, she could see her sister getting off the bed and preparing to exit the room. The last thing she heard was. "Sleep tight, my little ponies." And then Luna drifted off to sleep.

Sometime later, amidst the darkness of the night, Princess Luna stirred awake. Something was not right, and she knew it. It took her a moment or so to place the source of her distress: It was a faint but familiar urge in her bladder. Come to think of it, it had been quite a while since the alicorn remembered having gone to the bathroom. She hadn't already focused on not going in her diaper, but it seemed her body had more or less cooperated up to this point. Yet if she didn't do something soon, she was certain that would change.

That meant there was only one thing to do. The princess of the night rose from bed and planted her hooves firmly on the floor. As her eyes adjusted to the darkness, she focused her attention on a door at the other end of the room. She knew from experience that it led to the bathroom. And what luck, the door was open ajar.

As Luna proceeded to use her magic to take off her diaper and set it carefully on the floor, she was startled ever so faintly when she heard Twilight stumble awake. "Lulu? What are you doing?"

"I'm just going to the bathroom, Twily," Luna whispered in reply. "Go back to sleep."

"But Lulu," Twilight protested in a whisper. "You can just go potty in your diaper. Mommy will change you."

The moon princess would not be persuaded for a second. "No, Twilight," She said quite firmly, using the proper name to signal her defiance. "It is as I told you before: I can use the bathroom just fine. I do not require any assistance. Just because my sister has regressed me in size does not mean I must act the way she wants me to act." And she began to trot off, quite unconcerned.

Twilight got out of bed and followed the shrunken alicorn, pleading with her. "Lulu, please! Just put your diaper back on and go potty in it like all good foals do! You don't wanna get into trouble, do you?"

"I will not get into any trouble, Twilight," Princess Luna sought to reassure her fellow alicorn. "Don't try to stop me. I'm going to use the bathroom like a proper princess. Princesses do not piddle their pampers." Slowly but surely, she was advancing along the floor and towards the bathroom door. She was quite determined to go through with her little rebellion.

Nervously, Twilight continued to follow Luna all the while she whimpered with fright. "Lulu, you can't go in there!"

Without looking back to Twilight, the shrunken alicorn asked. "And whyever not, Twilight? You may be fine using your diapers for a bathroom, but I am not. Now please leave me alone!"

"But... but..." Twilight stammered, trying to think of a good counter argument. She finally seemed to settle on. "What about the potty monster? You know it eats foals! It might eat you!"

Luna rolled her eyes, unamused by the childish behavior from Twilight. "Twilight Sparkle!" She sternly scolded and snorted. "There is no such thing as a potty monster! You know that! You're not two! The potty is nothing to be scared of. I will use it, and you will see that it is perfectly sized for a pony my size, let alone a full grown pony like yourself." And with that, she strolled into the bathroom, brimming with confidence in her desire to use the almighty porcelain throne.

Once inside the bathroom, Princess Luna used her magic to flick on the lights, quickly spotting the toilet as it rested not far from the bathroom sink and its accompanying mirror. She paused briefly when she eyed it, seeing that it was now actually a bit larger to her due to her shrunken stature. Getting onto the seat would be a bit of a challenge. But that wasn't going to stop her. She hadn't come all this way just to turn back now.

Twilight entered the bathroom just in time to hear a loud slam as she saw the lid of the toilet be thrown back against the top of the tank! "Lulu, be careful!" She cried as she watched the princess of the night make her approach to the fearsome porcelain beast! "Oh, I wish Mommy was here!" She whimpered.

The moon princess, for her part, just took a deep breath. It was kind of hard to concentrate now that the urge in her bladder had started to grow! The close proximity of her body to the toilet was clearly adversely impacting her ability to "hold it in" as it were. It took all the will power she had not to start peeing on the tiled floor. She proceeded to back up, before running towards the toilet as fast as she could! When she got close to the lip of the bowl, she jumped and extended her hooves outward to try to grasp the seat!

By some miracle, the shrunken in stature alicorn managed to grasp the edge of the toilet seat and hoist herself onto it. Then she wiggled about, trying to get into the proper position. It was a task made difficult by the slippery feeling of the seat, and its cold sensation on her hooves! As a result, she ended up slipping. As she did so, one of her hooves happened to reach the silver handle off to one side.

There was a click as the handle was forced down. And then suddenly, there came a great roar! The noise was awful!

Luna looked down and gasped, seeing the waters within the toilet bowl swirl and surge ominously! The flush cycle had started! And there was worse to come for her, as her body lost its balance. The princess fell off the seat, falling into the toilet with a loud splash! Soon, she was swept up by the spinning whirlpool, thrown one way and then another as she struggled to keep her head above the water!

"What's going on in here?!" The stern voice of Princess Celestia demanded, as the sun princess came trotting into the bathroom at that very moment. From the look on her face, it was clear she was anything but pleased.

"SISTER, HELP! I CAN'T SWIM!" The frightened voice of Princess Luna shouted at the top of her lungs in her "Royal Canterlot Voice"!

"Mommy, help! The potty monster's trying to eat Lulu!" Twilight whimpered and shuddered with fright, too terrified to move!

Immediately, Princess Celestia dashed to the toilet and used her magic to pull Luna free from the bowl! Just in time too, as the waters retreated down the drain and the flush cycle ended. Then, carefully, the sun princess set her soggy sister down on the tiled floor.

"Oh, thank goodness you're okay!" Twilight happily exclaimed! "I thought for sure you were a goner, Lulu."

Luna protested. "I was never in danger, Twilight. I couldn't have gone down the drain."

"No, but you most certainly could've drowned!" Celestia sternly scolded her shrunken sister. "What in the wide world of Equestria were you thinking, Luna?! Why did you take off your diaper and try to go potty like a big pony?! Why didn't you just come to me for help?! Now look at you, you're soaking wet and covered in toilet water. I'm going to have to give you a bath."

The night princess looked at the ground in shame. "My apologies, sister," She replied in a mournful tone of voice. "I thought I could manage all by myself. Clearly, I didn't take into account the fact that I am much smaller now. And therefore, using the bathroom would be a bit of a challenge," Then she noticed something, her urge to pee had disappeared. Looking down at herself, she almost gasped when she saw a small puddle appear underneath her. "Oh dear. Sister, I am so sorry! I haven't done that in ages!"

"All of this could've been avoided, Luna," Princess Celestia pointed out as she used her magic to summon up some sponges and a bucket of water. "Your diaper was a perfectly acceptable alternative to the bathroom, and I wouldn't have been bothered having to change you. It's not like I didn't already do that when you were younger, or when you were getting used to toilets after coming back from the moon."

Princess Luna unhappily sighed. "I guess some of my old immaturity came back to me alongside this physical regression. I am usually not this... rebellious. I just didn't feel like I needed to act like a complete foal."

The sun princess sighed back. "I suppose it's partially my fault too, Luna, for springing this onto you without asking you how you felt about it. Even so, if you were unhappy, you could've just told me."

"But would you have listened?! You got so swept up in your role." Luna protested.

"Guilty as charged," Celestia admitted. "Though, was being a foal again really all bad? Wasn't it nice to have some time off from your responsibilities?"

The shrunken down moon princess found herself reluctantly agreeing as she watched her "accident" be cleaned up. "I guess maybe that wasn't so bad. But I'm not sure if I was really the best choice for Twilight when she is like this."

Twilight then hesitantly spoke up. "Um, Mommy?" She looked at Princess Celestia with a blush.

Princess Celestia was about to ask what the problem was, when a familiar odd reached her nostrils. "Twily!" She exclaimed! Her tone of voice making it hard to tell whether she was truly surprised or just pretending to!

Twilight whimpered and stepped back. "S-sorry. I just got really scared when Lulu fell into the potty, and... well..."

Celestia quickly recovered, cooing at the padded alicorn. "It's okay, Twily. It's nothing to be ashamed of. This isn't the first time you've had a messy diaper in my presence, and it won't be the last," Then she declared. "I guess I'll be giving you a bath as well. Once I take care of your dirty diaper, anyway."

A short time later, Twilight was changed out of her dirty diaper. And then, soon afterward, she and Princess Luna were deposited into a bathtub filled with warm water and bubbles.

Princess Celestia worked quickly but gently to get her charges scrubbed clean from top to bottom, and smelling nice again. Then, after taking them out of the tub and drying them off, she put new diapers on both of them while pulling the plug out of the bathtub to drain everything away.

Twilight and Princess Luna were then returned to bed, and this time Princess Celestia adopted to lay down next to them so as to ensure they wouldn't be able to wake up and get into trouble without also alerting her to whatever it was they were doing. But this time, there were no disturbances. The three alicorns slept soundly through the night.

When Princess Luna woke up the next morning, she was quite relieved to be back to her normal sized body with a dark blue coat, and a flowing mane and tail consisting of sapphire blue and persian blue locks. She blushed as she noticed the diaper still wrapped around her flanks, which apparently hadn't fallen off even though it was now clearly much too small for her. Well, that was quickly rectified when she used her magic: Not to remove the diaper but to more or less inflate it so that it was sized up to her current body height.

It was a good thing the princess of the night did so, for at that very moment she felt her bladder give off the telltale signs of needing to empty itself. Rather than try to trek to the toilet to take care of the matter, the now fully sized alicorn decided to use her portable toilet instead. She relaxed as a faint hissing sound could be heard, and her padding swelled up as it absorbed her "accident" (for lack of a better term). What had she been so fussy about the night before? Peeing in a diaper wasn't that bad, really. It might even be useful for helping her in her nightly duties, she wouldn't have to leave the dream realm to go to the bathroom.

"Now where could I find diapers in my size without anypony getting suspicious?" Luna thought silently to herself. Perhaps her sister would know? Surely, Twilight's diapers had to come from somewhere.

It was on the subject of Twilight that Luna's thoughts began to change. What she had witnessed last night was still fresh in her memory, and gave her cause for concern.

"Good morning, sister," Princess Celestia cheerfully greeted at that very moment as she got up from the bed, taking great care while doing so to avoid waking up the still sleeping Twilight. Soon, the sun princess' wandering eyes noticed the now comically large and sodden diaper on Luna's flanks. She couldn't stop herself from snickering ever so softly. "Did you open your floodgates again last night, little Lulu?"

"Perhaps I did," Luna vaguely replied. "But I am not little Lulu anymore. I am Luna once again," Though, with a blush she added. "If you want to call me Lulu while you change my diaper, I won't mind it."

"You sure you don't want to do it yourself?" Celestia appeared to sincerely question.

The princess of the night shook her head from side to side and lazily replied. "Nah. It's much easier to make you do it."

The sun princess smiled and giggled. "Now where was this kind of cooperation last night, sister?" Then she used her magic to lift her "little" sister up and carry her away. It was a lot harder to do it now that Luna was back to her full grown self, but somehow Celestia managed.

As Princess Luna was having her flanks wiped clean a short time later, she whispered to Celestia. "Sister, we need to talk."

"About what?" Celestia inquired. With her tone of voice it was hard to tell whether or not she was truly unaware of the conversation that needed to happen, or if she was just feigning ignorance.

Luna took a deep breath, knowing that this conversation was not going to be easy. "It's about Twily... I mean Twilight," She quickly corrected herself. "About what you're doing for her."

Princess Celestia's smile disappeared. "Are you saying I'm wrong to treat her as my child? To baby her and treat her as a foal when she chooses to act as such?"

"Are you sure it's just an act?" Princess Luna questioned with concern. "I fear she may be getting too deeply into the role. She may actually be starting to mentally regress, whether she realizes it or not."

"Oh come now, Luna," The sun princess replied by waving a hoof. "Twily... er Twilight knows that she can stop at any time if she wants to. Besides, I'm probably never going to be a mother any other way. This way, we both get what we want: I get a foal of my own, and Twilight gets a mommy to take care of her. And it lets us both escape our worries."

The moon princess just replied. "Well, it may not be a bad idea to perhaps ease off on the role, just for a while. I fear you may be unintentionally creating a dependency on you that will be difficult for Twilight to break. If it is not stopped, it could have profound negative impacts on her mental state."

Princess Celestia noticeably hesitated when those words reached her ears. She was silent for a moment or so, before she sighed deeply and told her sister. "I'll... I'll think about it, I guess."