Momlestia comes to the rescue

It was late one evening, shortly before the Grand Galloping. Rainbow Dash was feeling quite embarrassed as she flew across the sky heading towards the Golden Oak Library. The daredevil knew what was going to happen, she would basically be teaching her friend how to use the potty like an older sibling that evening. Secretly, the pegasus was also excited seeing how hilarious it would be bossing Twilight around like an older sister.

But as the mare flew her cheeks grew hot pink, heard an audible hiss and felt a warm liquid fill her pull-up. The pegasus landed on the ground and stomped a hoof as she shouted. “Oh ponyfeathers! Why now?” Rainbow Dash grumbled irritably as she trotted towards the library and kicked about in her sodden pull-ups quite angrily. “Seriously! I'm supposed to show Twilight how not to have accidents! She’ll never listen to me if I’m already soaked.”

The daredevil suddenly stopped and gulped upon seeing the library now in front of her. Realizing there no use in turning back now, the daredevil pegasus reluctantly sighed as she knocked on the door with her cheeks still flushed a shade of pink. The pegasus squeaked as the door opened to reveal Celestia standing over her with that lovely smile on the princess’ face.

Princess Celestia gestured. “Hello, Rainbow Dash. You ready for your padded sleepover and your special assignment??”

Rainbow squeaked as she stood there, stammering. “We..I...we...yeah, sure… But… um...”

Celestia eyed Rainbow as she checked the pegasus’s rear and felt the soggy padding as she giggled. “Awww, you're already wet? Why didn’t you just come get me? I would’ve changed you before letting you teach Twilight about the potty.”

“Stop that! You don’t have to keep treating me like I’m three all the time, I can change myself you know.” The pegasus whined as she stomped inside to see Twilight was sporting a thick diaper with moons and stars printed all over her padding.

Twilight was plopped down in a playpen full of plushies and foam blocks. A blush started growing on her face as she asked Rainbow. “So, you're my big sister tonight? The one who’s gonna help me potty train?”

“Yeah! And that means I get to boss you around all-eep!” The pegasus cried out as Celestia picked the pegasus up and slid the flight suit off Rainbow Dash while slowly taking off her soggy pull-up.

“Ugh, do you really have to do that in front of Twilight?! Big sisters aren’t supposed to be changed in public!” Rainbow whined as the princess continued to change her into another Wonderbolt style pull-up.

Celestia simply booped her charge’s nose. “Oh, stop your whining and let me finish. Twilight puts up less of a fuss than you. Maybe I should reverse the roles and have you learn from her? She’s so smart she could probably run her potty training on her if she wanted to.” She then adjusted the pull-ups.

Twilight then bounced on her padded tush and snickered behind a hoof at Rainbow being babied as she dawwed. “That's so cute! You look great in pull-ups, Rainbow! You’re lucky you get to wear them all the time.”

“Celestia! Make Twilight stop! I’m gonna die of embarrassment if this keeps up!” The pegasus cried out as she started kicking.

The princess burst into laughter upon seeing Rainbow and Twilight acting like foals and dawwed, “Twilight, be nice and stop teasing your big sister. It was nice of her to volunteer to help with potty training on such short notice.”

The unicorn’s cheeks flushed pink as she scrunched the padding between her legs and responded. “Ok, Celestia, I’ll be a good filly. I can’t wait to learn from my big sister!”

The princess then turned to face Twilight and asked. “Well before we start, why don’t we get you into some pull-ups too? That’ll make the training a little easier.”

Twilight squeaked as Celestia then started to slowly untape her rump and quickly slid a pull-up on her student’s rump. Twilight’s face was now a deep pink upon seeing Luna’s cutie mark on her padding. “Well, I guess these new Luna style pull-ups are rather cute.”

“Yes they are! Now come on Rainbow, don’t you wanna show us all how much of a big filly you are?” The princess asked in a motherly tone.

Rainbow scoffed as she took Twilight by the hoof. “Alright, come on, Twilight. I’ll show ya how to use the potty! It’s easy.” The pegasus promptly led Twilight through the library to the bathroom,

The unicorn blushed, having flashbacks of when her brother helped her learn to use the potty as a foal (with a good deal of teasing at first, before she found out how long he’d stayed in diapers). She waddled across the library despite knowing where she was going, embarrassed now over having to wear pull-ups and being escorted around like a little filly. Her actual potty training as a toddler had never been this patronizing to her.

Rainbow turned to Twilight and couldn’t help but tease her a little. “Oh come on, Twilight, you can do it. The potty’s not that far.”

The unicorn turned around and snapped. “Hey, I’m not the only one in pull-ups around here!”

“At least I don’t wet the bed!” Rainbow looked over her shoulder and snapped back.

Twilight snapped back. “Well at least I don’t wet myself while flying!”

And Rainbow grumbled. “At least I can fly!”

“Girls, stop that! No more fighting!” The princess scolded the two mares like a mother over her foals with a stomp of her hoof.

Both mares blushed and whispered. “Yes, Princess Celestia.”

The alicorn gave them both a smile and cooed. “Now go on, get to the potty before one of you has an accident.”

Rainbow continued to escort Twilight to the bathroom and the unicorn was astonished at what she saw upon entering the bathroom! There, in the middle of the room, was a Celestia styled plastic training potty with the princess’s cutie mark on the white colored plastic seat.

“Wow! Where did this come from?!” Twilight asked with her eyes widening.

Celestia walked into the bathroom with that motherly smile she was becoming known for and cooed. “Well, since someponies call the toilet the porcelain Celestia, I figured you’d feel more comfortable having a training potty in my image. So I had this one custom ordered. Now before Twilight goes, Rainbow you may go first to demonstrate the process.”

Rainbow’s cheeks flushed red as the princess used her magic to help Rainbow's pull-up down and helped her sit down on the training potty. The pegasus kicked about, feeling so embarrassed as she squeaked. “Hey, look away! You gotta give somepony privacy when they’re on the potty!”

Celestia and Twilight did as Rainbow asked as a tinkling sound soon echoed throughout the bathroom. Celestia and Twilight clapped together as they then watched the pegasus dump the contents in the toilet and flush before setting the training potty back down. The princess hugged Rainbow fully, enveloping the pegasus into her feathery embrace as she whispered. “Good job, little filly.”

Rainbow felt flush with pride as she lifted her head up and shouted! “Yeah! See?! That's how you do it, Twilight! At least on the training potty, you have to get good at using that before you can use the real thing.”

The princess then helped Twilight pull her pull-up down and helped sit her down on the training potty next. “Now, Twilight, you're younger so you’ll stay there for five minutes even if you don’t have to go. But I want to try.”

Twilight’s gulped as she stammered. “O...o...ok... Princess. I’ll… I’ll do my best.”

Celestia and Rainbow Dash gave Twilight her privacy, standing outside until they eventually heard a tinkling sound. Then after they heard the flush of the toilet and the washing of hooves in the sink, Twilight came waddling out of the bathroom with her cheeks flushed pink while she raised her hooves and squeaked. “Yay I did it! I finally managed to go potty, and by myself too!”

Celestia and Rainbow cheered and the princess helped pull Twilight’s Luna style pull-up back up over her rump. “Well done, Twilight! And on your first try too!” Celestia cooed. “You and Rainbow Dash are getting the hang of this potty training fast, you may be able to graduate after the Grand Galloping Gala.”

“I hope so,” Rainbow blushed. “Can’t be a Wonderbolt if you’re not potty trained! And they’ll never take me seriously as long as I have to always wear pull-ups.”

Twilight giggled. “It reminds me of Magic Kindergarten, and how I was the foal in class who was furthest along in potty training. They’d always use me as an example for the other students.”

“Alright, come on now. You two should go play for a bit, it's almost night time. You’ll both have to use the potty again before bed though.” Celestia chimed and the princess then led the two back to the main living room and let them play together.

It was hilarious as the two ponies stacked the giant foam blocks and Rainbow tried to lead the building of the tower. Twilight kept pointing out flaws in the building though, saying things like: “That's not where you put the triangle blocks! Or “Ya got to be careful, those blocks could fall over!”, generally becoming more bossy than her “older sister.”

Rainbow was getting quite furious and scoffed as she sat back in her pull-ups and watched. “Ugh! You're such a bossy baby sister, stop trying to be better than me! I know you're smarter than me! You don’t have to keep rubbing it in.”

Twilight pouted and crossed her hooves as she snapped. “I am not a baby!”

Rainbow got up and turned to the princess as she asked. “Hey, Princess Celestia, don't you have some spell you could use to make Twilight the baby sister? She’s getting too bossy.”

The princess laughed. “Oh, I could make this roleplay more interesting. I’ll be careful not to regress her too much,” She lit her horn and shot energy into Twilight. “This will only last for a little bit.”

Twilight tried to snap back, but found that she could only babble incoherently as Rainbow laughed, clapping her hooves. “Now I'm a big sissy!” The pegasus snuggled Twilight who grumbled irritably as she babbled and blew bubbles through her mouth. She then plopped down as Rainbow tried to be more of a big sister.

Twilight, meanwhile, squeaked as she felt the sudden urge to pee but didn’t know how to communicate this. She ran off with the pegasus noticing and flying after her all the way to the bathroom.

As they reached their destination the unicorn babbled and blew bubbles as she pointed at her pull-up. Rainbow Dash then helped Twilight slip the training pants down to her hooves and placed Twilight down on the seat of the plastic potty again. “The training potty, not the big one. You’re not ready for it yet.”

Celestia came by and clapped her hooves as she applauded the two. “Good job, Rainbow, you're being such a good big sister. You’re definitely gonna be ready to move on to the toilet after this. Now come on, let's give Twilight her privacy. The spell should wear off shortly.”

The princess escorted Rainbow out of the bathroom as Twilight tinkled in the potty, feeling so patronized and yet so relieved. Afterwards, she held her hooves up and shouted, “Okay, I'm done!”, realizing that she could speak again!

Celestia dawwed and came over as she nuzzled her student before wiping her rump. After that she helped Twilight pour the contents of the training potty into the toilet and flushed it all away. The princess then placed a smiling sun sticker on a potty chart on the bathroom wall that she had set up for this occasion.

Twilight felt so embarrassed even though a part of her was enjoying the patronizing as Celestia helped pull the pull-up over the mare’s rump and cooed. “Oh, you're just so precious! You’re growing up so fast!” Twilight giggled and cooed.

Rainbow, feeling quite jealous, came over and whined. “What about me? I’ve been potty training for longer than Twilight and haven’t had as many accidents. Aren’t I precious?”

“Oh, you’re precious too, Dashie. Definitely worthy to start training with the toilet. Now how about I read you two a story before bed?” The princess asked with a smile.

The mares both nodded as Celestia took the two and plopped them right into her lap as she read them Daring Do. Both mares squealed kicking about in their pull-ups as the princess read them the adventure stories. Meanwhile, the princess of the sun plopped pacifiers into their mouths and watched as they suckled on their rubber bulbs as they were lulled into a deep sleep.

Once the two were deep asleep, Celestia went about changing Twilight from her pull-ups back into a pair of the special nighttime pampers. And then went about doing the same to Rainbow Dash as Luna walked in with her wings spread out.

Princess Luna stomped a hoof and shouted. “Not fair, sister! I wanted to pamper them! You get to have all the fun.”

The princess of the sun blushed. “Sorry, but it's too late now. Besides, you’re still getting used to the modern Equestrian language.”

Just as the princess was smoothing the tapes of the diapers Luna sat there and pouted. “You always go and baby them before me. And you’re always talking about how much fun you’re having, how it’s like having your own foals. I want to experience some of that too! I could even help with making sure they get to the potty at night, something that lots of little ones struggle with.” The alicorn then helped to lift the two mares, drifting them into Twilight’s bed and then pulling the blankets over them.

Luna then took out two bottles full of her breast milk and plopped the bottles into the padded ponies’ mouths. Celestia snickered. “Awww, you pumping your own breast milk too?”

“Well...I started lactating too, and it would be such a waste just to let the milk expire,” Luna's cheeks flushed pink as she responded. “Once this whole bedwetting thing subsides we should probably start medication to stop the lactating.”

Celestia nuzzled Luna and asked with a smirk. “So, how's Twilight’s bedwetting issue? You making any progress?”

“She’s doing much better overall, she only lighty pees the bed now. It seems you're starting her re-potty training perfectly. She should be cured of Nightmare Moon’s curse in no time.” Luna explained with a smile on her face.

“Well, it was rather cute to see Twilight acting so young. I hope I get to do this a few more times before she’s completely cured.” Celestia whispered and kissed her sister on the cheek as they watched the two padded ponies sleep soundly and suckling the warm breast milk down their throats.

“Don’t give me any ideas, sister. And don’t get any about doing it to me either,” Luna chuckled. “You’ve already gotten to baby me twice.”