With a towel spread out on the floor, Scootaloo sits down on it and proceeds to squish her poop all over her bottom. She places her hooves at her crotch and pulls her poop up, rubbing it all around her pussy and penis.

She enjoys this behavior and thinks to herself, “Maybe I am a baby… I bet they play like this with their poopy diapers too. Diapers are just so good to wear.”

Now content and satisfied with her diapers, Scootaloo continues rubbing herself and squishing her poop all around under her diaper. She likes this very much, including the smell of her poop.

Her penis has been erect since she pooped her diaper on the way home from Twist’s house and remembering what Rarity did during her last diaper change she puts special effort into putting her hooves over her stiff penis and squishing it into the poop that surrounds it inside her diapers. The warm, squishy and slimy feeling eventually makes her young body shudder.

After a short time, while she lays on her back recovering from her exertions, Scootaloo gets some toys with which to play and returns to her towel. She stays there for some time more enjoying herself, and lost in her imagination.

In the kitchen, Rarity thinks about Scootaloo and her desire to wear and use diapers. She accepts that she likes this behavior very much and further decides that she will support and encourage it as long as Scootaloo wants to behave this way. She is pleased with Scootaloo and can’t get over how confident and happy she is when wearing and using diapers.

‘I bet that filly has wet herself by now. Her diaper must be a sight. I should go check on her and see.’ She thinks to herself.

Scootaloo did in fact wet herself several more times and watched as her diaper became wetter and wetter. She also rubbed herself more, remembering what Rarity had said Scootaloo began to pay attention to the fact that her penis was not the only thing that had begun to feel good when she pooped her diaper. Scootaloo began to rub herself a bit lower down in her diaper and enjoyed squishing her poop into the area below her penis where her pussy was.

In the process, she also realized that within her plastic panties, the wetness had turned brown and was leaking onto the towel, due to her playful actions and her third and fourth pee.

She was staring at her crotch as Rarity walked into the room.

“Well, how is my diaper filly doing? Did you wet your diaper more?” she asks with a smile on her face.

“Oh yes I did Rarity, I just peed a little while ago and was playing and….” replies Scootaloo. Rarity can see Scootaloo’s diapered state and the leaks on the towel.

“That’s okay. I can see that you were playing with yourself in your diaper and it’s fine That’s why I had you use a towel. I had an idea that you would like to play in your poopy diaper. Fillies do that, you know. Let’s get you changed now and into a fresh diaper, alright?”

Scootaloo just smiles and lies down.

“Thanks Rarity. I just had the best time playing in my diaper. It felt so good and all.”

“And so you should honey. Acting this way at nine is not a bad thing. It is just different and I want you to know that it is okay with me that you like playing with yourself in your messy diapers.

“No matter how messy and smelly I get in them?” asks Scootaloo, a grin on her face.

“Especially if you get all messy; that’s what I’m here for, to take care of you on the days your parents have to go on trips. Now let’s see how good and messy you got yourself,” she says.

“Oh Rarity that is so cool. Thank you so much,” replies Scootaloo.

Rarity then goes and gets her diaper changing supplies and a fresh diaper and plastic panties. She pulls down Scootaloo’s plastic panties, exposing a very wet and messy diaper. She sees that Scootaloo has got poop all over her crotch and up the front of the diaper.

“Well, my diaper filly sure did get herself messy while playing in her diaper. I am glad you had such a good time doing so.”

“Thanks for letting me be a diaper filly. I really like it a lot and it feels so good.”

“I know it does honey and that’s why you can wear and use them all you want. She then un-tapes Scootaloo’s diaper and pulls it down.

Scootaloo’s poop smell fills the air as Rarity opens up her diaper. They both smile as they smell it.

“You are a very stinky filly, Scoots.”

Scootaloo blushes a bit at her comment.

“Yeah Rarity I sure am, aren’t I?” She giggles out loud.

Rarity does the same, “And that's fine with me, I don’t mind at all. You’re kind of cute this way.”

Scootaloo’s penis begins to grow again as its exposed to the air. Rarity smiles seeing this.

“My, my; this diapered filly does like getting her diapers changed. And so she should. Feeling good in diapers is a good thing, and we both know that you enjoy them very much. I enjoy you in them too, and changing them, Rarity says as she again holds Scootaloo’s messy erection in her hooves.

“Oh Rarity, you are just the best. Thanks,” replies Scootaloo.

“You are very welcome,” she says.

To Scootaloo’s surprise, Rarity pushes her penis forward exposing her poop smeared pussy even more and then bends down and begins to lick it. Scootaloo is amazed at how good this feels but is confused by Rarity’s behavior.

“Uh, Rarity, why are you licking me there, I’m covered in poop…” Scootaloo says while at the same time arching her back up off the changing pad slightly to press her now very sensitive pussy against Rarity’s wet tongue.

“The taste isn’t great, but that’s not the point. This is one of the best ways to make a filly’s pussy feel good, and your poop also helps. Whenever your pussy begins to feel good you can either rub it with your own hooves or ask me to lick it for you. I’ll always be happy to help you with this.”

“Wow, um, thanks Rarity!” Scootaloo says, though she is still a little unsure about this new development. She has never been licked anywhere by Rarity before. But it feels so good that she can’t think of anything wrong with what Rarity is doing.

Soon Scootaloo’s body arches further off the floor in a surge of pleasure even greater than when her penis was being rubbed. She had no idea that the parts of her body that were being covered by her poop inside her diaper could make her feel so good.

Breathing hard, as though she had just run around the house Scootaloo lays back and sighs.

“So it seems my little diaper filly enjoyed that quite a bit. I hope you will let me help you again when you get messy.” Rarity says, licking the mixture of young filly cum and poop off her lips.

And perhaps in not too long some of your friends will be interested in doing the same thing for you, like Sweetie Belle perhaps.

“Really? You think Sweetie Belle would do what you just did?” Scootaloo askes in surprise.

“She just might, time will tell though, it’s not something to rush.”

For the moment though, let’s just keep our fun between the two of us.”

Scootaloo feels so good about everything Rarity says and also with her licking and then cleaning of her messy crotch. Her penis is still fully erect with all that was going on.

Rarity finally got Scootaloo clean and went and got a fresh diaper. She brings the diaper up between Scootaloo’s legs to fastens it securely onto her cute butt. She then places a fresh pair a plastic panties on her, light blue this time. Scootaloo stands up and Rarity checks out her work to make sure the diaper is completely within the plastic panties. She then hugs Scootaloo and swats her diapered butt.

“You’re all set to go and play honey. You don’t have to wear any pants if you don’t want too. It’s okay with me if you play in just your diaper.”

“Thanks mom!” Says Scootaloo, her young filly’s body looking so cute in just a thick disposable diaper and plastic panties.

Rarity picks up the messy diaper, supplies, and towel and takes them out of her room and into her bathroom. She is very pleased with how Scootaloo’s diaper change went and the continued education she was able to provide.

She smiles to herself, thinking about the state of Scootaloo’s crotch when she removed her diaper.

‘That filly does enjoy her diapers. She had poop all over herself!’

She looks at the messy diaper being held up in her magic field, still warm from the time it spent on Scootaloo’s body.

‘Perhaps…yes, perhaps this diaper has not ended its usefulness quite yet.’ She decides as she locks the door to her bathroom. Scootaloo has already gone outside she can tell by the sound of the back door opening and then closing. Without hesitation, she opens up Scootaloo’s poop smeared diaper and squishes is firmly up against her own wet pussy.

Moaning in pleasure as quietly as she can while smearing friend’s daughter’s poopy diaper all over between her legs, Rarity decides that having a diaper filly around the house will make her happier than she ever realized it could. Scootaloo will be back with her parents the day after tomorrow, but Sweetie Belle, who is already wearing diapers at night and seems to like them, will make a great diapered partner, if only she can get her little sister to enjoy her diapers as much as Scootaloo now does.

She moans even louder at the thought.