Rarity yawned as she woke up, she quickly turned on the filly monitor she had on the nightstand next to the bed. She heard silence from the other end so she got up and started getting ready, hoping to be done before Twilight and Fluttershy woke up. She started to hear some rumblings from the monitor while she was giving her hair its signature curl, so she quickly finished so she could greet the two fillies as they woke. In the time it took her to walk from Twilight’s bedroom to the nursery Twilight and Fluttershy were already awake and were snuggling together quietly.

“Good morning sweeties,” Rarity sang. Twilight and Fluttershy turned finally noticing her come in. Twilight was still suckling on her pacifier and holding a stuffed rabbit while Fluttershy was just laying down her pacifier hanging from her pajamas by a clip. Rarity unlocked and opened the crib and let the two out. “I think I’ve got an idea of something fun we can do today.” Rarity said getting the two out of their pajamas.

“What’s that Rarity?” Twilight asked eagerly.

“I don’t want to ruin the surprise,” Rarity said getting the two of them undressed. She then made them lie down on the changing table Twilight had wet during the night but Fluttershy was dry so Rarity focused on changing Twilight first. Twilight suckled on her pacifier while Rarity changed her. “Fluttershy I noticed your diaper isn’t wet you aren’t holding it in are you?” Fluttershy looked away ashamed.

“Maybe a little,” She said messing with her hair embarassed.

“You may be Twilight’s big sister but you’re still a filly and fillies use their diapers,” Rarity said authoratively. “You don’t want me to tell you twice.” Fluttershy blushed and started wetting her diaper while Rarity finished changing Twilight. Rarity got Twilight in a diaper before Fluttershy finished so she waited patiently on Fluttershy.

“I’m done,” Fluttershy said meekly. Rarity put a pacifier in her mouth and started to change her

“Good girl,” Rarity cooed. Fluttershy suckled on her pacifier while Rarity finished changing her. Now that both Twilight and Fluttershy were in clean diapers Rarity giddly moved toward the closet to pick out outfits for them. “This is my favorite part,” Rarity said looking through all of the outfits she had made trying to find the best one. “I’m thinking we go with a short dresses because it’s so hot out.” Rarity said holding out a white and red dress with an embroidered strawberry design on the front. She then pulled out a similar dress that was blue and had small pictures of flowers throughout. Rarity expertly dressed Twilight in the strawberry dress and Fluttershy in the blue one. She then finished the ensemble with a red diaper cover and bonnet for Twilight and a blue diaper cover for Fluttershy.

“I don’t know,” Fluttershy said looking at the dress in the mirror. “Everypony can see my diaper.”

“That’s the point dear,” rarity said dismissively. “It looks cute, and it makes it easier for me to check when your diaper. I’m sure Twilight agrees.” Twilight nodded her head enthusiastically and hugged Fluttershy. With the extra love from Twilight Fluttershy accepted the dress.

Once Twilight and Fluttershy were dressed Rarity lead them into the kitchen putting them in their highchairs for their breakfast that consisted mainly of filly food which was complimented with slices of fruit.

“Now the first thing we have to do before we get to the surprise is take care of the critters at Fluttershy’s cottage,” Rarity said shoving a spoonful of the mush into Twilight’s open mouth.

“Oh yes,” Fluttershy agreed excitedly sitting on the edge of the highchair with the straps preventing her from going too far. “I know Rainbow Dash and Applejack did their best, but I miss all my little critters and …” Fluttershy was interrupted by a spoonful of filly food.

“And I bet all the critters miss you and your special brand of tlc."

“Sissy is da best at takin care of da aminals!” Twilight exclaimed happily.

“She sure is,” Rarity said feeding another spoonful in. “Do you think you can be a big girl long enough to feed them Fluttershy.” Fluttershy nodded knowing what Rarity meant. Fluttershy then opened her mouth for another bite of food. Rarity obliged and stuck a spoonful in her mouth. Rarity continued to feed Twilight and Fluttershy until the large jar of filly food was gone. She then led them back into the living room and into the playpen where she locked it shut.

“Now you two be good and play in here. I’m going to make us a little pic nic and then we can head out,” Rarity left into the kitchen to pack some food. When Rarity was gone Twilight buried her head in Fluttershys chest.

“It’s still a little weird for you isn't it?” Twilight said laying against Fluttershy. Fluttershy nodded her head.

“I think I’ll get used to it,” Fluttershy said apologetically.

“You don’t have to,” Twilight said giving Fluttershy a kiss. “It’s enough that you’re doing it with me. I’m having fun with you.”

“I’m having fun too,” Fluttershy said relaxing a little. “But I think I want to be mommy again soon.” Twilight giggled at this.

“Yeah I want my mommy back too. But we can wait until tomorrow can’t we. I think Rarity really likes playing foal sitter.” Fluttershy smiled and nodded yes. There was a small pause in the conversation.

"Twilight I've been meaning to ask," Fluttershy began as she stroked Twilight's mane. "I know you've been busy lately with taking care of me and everything so you haven't really tired, but if you're still having accidents I can help."

"No it's fine really," Twilight said happily. "I mean you're always going to be there to change me, and you know that's how I like it." Fluttershy smiled.

"Yeah I like it that way too." Rarity returned interupting the moment between Fluttershy and Twilight, she had a full pic nic basket and was wearing a white sundress with purple and yellow trim and a fairly large white sun hat.

“You two ready,” Rarity said opening the play pen. Fluttershy and Twilight happily nodded yes and walked to the door. “Well the stroller only has room for one so you two are going to have to take turns riding it. Fluttershy you get to ride first.” Fluttershy nervously sat down in the stroller and Rarity strapped her in making sure all of the straps were tight. Fluttershy couldn’t sit up very far in the stroller but she didn’t want to because she found it incredibly comfortable to lay back and relax. Rarity folded out the sun visor on the top and Fluttershy began suckling her pacifier and entered a state of calm. Once Fluttershy was secured Rarity attached a lead to Twilight’s collar and tied it to the stroller so that Twilight couldn’t move very far from it. “Ok now that all the fillies are safe and secure let's go."

Rarity pushed the stroller and Twilight and Fluttershy with it out of Twilight’s castle and towards Fluttershy’s cottage. Fluttershy was quiet the whole way enjoying riding in the stroller. Twilight on the other hand was talking with Rarity about various thoughts that entered her head like why trees were green and why nopony liked beets. Rarity humored her through these conversations until they arrived at Fluttershy’s cottage. Rarity let Fluttershy out of the stroller and untied Twilight’s lead holding it in her hoof. Fluttershy immediately walked to a shed in her back yard and got out several bags of food.

“Do you need any help darling?” Rarity asked as Fluttershy already began to feed the animals.

“No I can take care of it,” Fluttershy said as she happily began flying around feeding the animals still in her filly attire. Twilight watched happily as Fluttershy fed the animals while Rarity checked Twilight’s diaper.

“You’re wet dear,” Rarity said patting Twilight’s diaper. “And I bet Fluttershy is too. I’ll change you two after Fluttershy gets done.” Twilight seemed to be enamored with watching Fluttershy and didn’t notice Rarity. Rarity sighed and began setting up a blanket nearby. Eventually Fluttershy finished feeding all of the animals and also found time to love in pet each of them, she fluttered over to Rarity who was sitting Twilight in the stroller using it as a highchair by attaching a tray to it. “How did it go?” Rarity asked handing Fluttershy a sippie cup of juice.

“Oh just wonderful I missed my animals so much,” Fluttershy said taking a drink from the sippie cup. Rarity was busy setting a sandwich on Twilight’s tray and helping her eat it.

“Since you’re the big sister here Fluttershy I thought you wouldn’t mind eating on a plate.”

“Oh that’s fine I know Twilight can be a messy eater,” Fluttershy said teasingly. Twilight stuck her tongue out at this.

“Now quit bickering both of you,” Rarity said threateningly. “Or you’ll both get spankings during your next diaper change.”

“She started it,” Twilight said.

“And I’m ending it,” Rarity said finally. Twilight and Fluttershy shared a knowing smile and Rarity helped Twilight start eating. After everyone was finished eating Rarity motioned for the two of them to lay in her lap, and Twilight and Fluttershy rested their heads on each of rarity’s legs. “Alright I’ve got bottles for both of you so open up,” Rarity said cooing. Twilight and Fluttershy immediately started suckling from the bottles offered to them. Rarity hummed a song while the two finished their bottles and once they were done she laid them on their backs on the blanket and began to change their diapers out in the open. Despite the relative remoteness of Fluttershy’s cottage they were both a little embarrassed by being changed in the open, but nopony was around to see it happening. “Ok my fillies are nice and clean and all the little critters are fed,” Rarity said as she started packing up the pic nic.

“No we getting our supwise,” Twilight said as Rarity strapped her into the stroller.

“Yes and I think you are going to like it,” Rarity said pushing the stroller with Twilight strapped in it back into town. Fluttershy followed close to Twilight.

The group made their way through a remote part of town into Rarity’s boutique relatively stealthy having only been seen by one passerby who didn’t seem to notice anything strange. As soon as they were safely inside Rarity let Twilight out of the stroller.

“Where’s the surprise?” Twilight asked impatiently.

“Yeah you’ve built it up so much I’m curious too,” Fluttershy said adding to the general enthusiasm.

“Well,” Rarity began. “You know how well my adult foal line has been doing and it’s all mostly thanks to you for giving me the inspiration.” Rarity had moved into a back room and was rummaging around through several designs in said line looking for something.

“Oh go on,” Twilight said flattered.

“I thought I might return the favor since I had some free time while I was letting the brand rest this season so I made you something.” Rarity rolled at a large rack filled with several high quality locking collars each with a matching set of cuffs. “The one Twilight has now is getting a little dirty and Twilight you can pick one out for Fluttershy to wear when she wants to play big sister again.”

“Wow Rarity,” Twilight said admiring the care that seemed to go into making each one. “These are really nice.”

“And you made so many of them,” Fluttershy added.

“Well I wanted you to have options,” Rarity said. “And I everything I make is of top quality."

“I don’t know what to say,” Twilight said overwhelmed.

“Well you can start by picking out the one you think goes with Flutterhy’s coat the best. I think these are the best ones for her,” Rarity said pointing out a particular group of collars. Twilight pondered over the various colors until she settled on a pink one with butterflies on it similar to Fluttershy’s cutie mark.

“Ooh I like that one,” Fluttershy said remarking at the collar Twilight picked out for her.

“Well go ahead and put it on her,” Rarity said excitedly. Fluttershy blushed and lowered her head for Twilight. Twilight gingerly began putting the collar around Fluttershy’s neck and tightened it. Rarity came in to make some final adjustments and ensure the fit was right. “Ok what do you think?” Rarity asked. Fluttershy struck a dramatic fashionista pose that showed off the collar casing Twilight to laugh a little.

“I think it suits you well Fluttershy,” Twilight said happily.

“I like it to,” Fluttershy commented.

“Great!” Rarity said excitedly. “Let’s lock it on then. Rarity placed a small round lock into the appropriate hole in the back of Fluttershy’s collar and locked it shut. Fluttershy struggled with the collar to test it and sure enough she couldn’t get it off on her own. Rarity briefly went over how to get the lock off and then she and Twilight put on the set of cuffs that went with it, one on each of her legs. Fluttershy moved around trying to get used to the new sensation. “Ok Fluttershy your turn,” Rarity said bringing the set of collars over to Fluttershy. She looked over them for a minute with Twilight waiting eagerly nearby. Eventually Fluttershy settled on a very dark blue, almost black one with a white star pattern. Twilight gawked at the pattern while Fluttershy expertly put the collar on her getting it just tight enough and then locking it like hers was. She then quickly put on the matching set of cuffs.

“I think this one is thicker than the last,” Twilight remarked.

“Oh is it too much dear?” Rarity asked concerned.

“No I like it.”

“Well good, now for the finishing touch.” Rarity pulled out two keys each of them in a heart shape and they had Twilight’s and Fluttershy’s name carved into them. Rarity attached the keys to the metal rings on each of the pony’s collars with a key ring the one with Fluttershy’s name going to Twilight and vice versa. “Now each of you have the key to the others collar and that’s the only key. So to make sure you don’t lose it I took the liberty of attaching it to your own collars.” Twilight and Fluttershy took a moment to look at the rather ornately designed keys before looking back at each other and smiling.

“Thank you Rairty,” Fluttershy said happily.

“Yeah these are so nice,” Twilight added.

“Don’t mention it,” Rarity said dismissively. In a sudden burst of movement Rarity attached a short leash connecting Twilight and Fluttershy by their collars. “Now why don’t we pick up where we left off.”

Author's Note

This was supposed to be two chapters but as i was writing it the break in the middle didn't feel right so I combined them. That being said this is probably going to be the last chapter, that means the next part will be the epilogue, and I've got a really cool idea for that. Anyway as always I hope you guys enjoy it.