Author's Notes:

This was done by request of Ashleighross. I hope you enjoy it.

It's my first time writing fetish fuel in a while so forgive the low quality of it, as well as it being pure fetish fuel like my stories usually are.

Sunset Shimmer and Rainbow Dash were having a sleepover at Rainbow's house. They were both wearing their pajamas: Sunset's were dark pink, and Rainbow Dash's were a white shirt and blue pajama pants.

It wasn't long into the sleepover that they began to feel some discomfort due to undercooked food they had eaten at a restaurant, which they had just gotten back from.

PPPPPFFFFRRRRT!

Sunset farted loudly, and blushed. "Um... excuse me."

"It's all right. I find it really funny." Rainbow Dash lifted her leg.

FFFFFFFFRRRRRRRRRRT!

Rainbow laughed at the sound of her own loud, wet fart, and a few seconds later, Sunset did the same.

After about a minute of farting, their bowels suddenly felt more pressure, the kind that meant more than just a fart, or several.

Rainbow immediately ran into the bathroom first. The door closed and locked just as Sunset reached the door.

Sunset waited patiently, and almost giggled at how noisily Rainbow Dash was doing her business inside. But, she needed to go very badly, so she knocked on the door.

"When are you going to be done?"

"In a minute!"

Sunset felt the pressure grow heavier, and a very wet fart making its way out of her rear, which made the back of her pajama pants a little wet, making her even more nervous.

"Are you almost done? I REALLY have to go!"

"I'm going as fast as I can, but... ugh..."

Another loud fart could be heard, and Sunset knew Rainbow wasn't close to being done yet.

Then, it started to come out, very slowly. Sunset tried as hard as she could to stop it, but it was no use. She had no control. Sunset was soiling her pajamas, and there was nothing she could do about it.

She blushed beet red as the mess continued to slowly make its way out of her rear. The bulge on her pajama pants grew every second, and the smell reached Sunset's nostrils, adding to her humiliation.

She could feel the inside of her panties and pajamas slowly getting messier, and by now the back of her pants were brown. Again, she tried to stop, but it continued to slowly ooze out of her.

Another fart could be heard on the other side of the door, but Sunset barely heard it. All she could think about was the still-growing mess in her pants.

Finally, she was done. Or at least, she thought she was. There was a big, wet, smelly brown mess in her pants and underwear, and she had never been so embarrassed in her life.

Just as she was sighing of relief, the second wave began slowly coming out. This caught Sunset off guard, and she moaned in discomfort and extreme embarrassment as the mess in her pants grew even bigger, and she was unable to stop it. The slow oozing continued to taunt Sunset that she was pooping her pants.

Inside the bathroom, Rainbow finally finished. She didn't want Sunset to have an accident, so in her rush to get out and let her have her turn, she pulled up her pajama pants without wiping.

Rainbow opened the door. "All right Sunset, you can come in now."

It was way too late at this point. Rainbow Dash had only opened the door for one second before Sunset finished messing herself. Rainbow could smell it, and Sunset only blushed with embarrassment, on her knees, and hung her head in shame.

"Sorry for taking so long," said Rainbow Dash. She knelt down and hugged Sunset, not caring how smelly she was.

Sunset started to feel better, despite the state she was in.

Then Rainbow stood up and stuck her butt in Sunset's face. Sunset was a little taken aback, and Rainbow pulled down her pants to show her underwear still (mostly) clean. This wasn't the first time Rainbow had shamelessly exposed her butt so Sunset just giggled a bit.

After Rainbow puller her pants back up, she said "Dig your hand between my butt."

Sunset wasn't sure why, but she did as she was told, pushing Rainbow's pants and panties inward and rubbing it around a bit.

Once Sunset was done, Rainbow pulled down her pants again, and Sunset saw that her underwear was extremely dirty.

"I was in such a rush that I forgot to wipe, and now my underwear's dirty too."

Sunset and Rainbow giggled, all Sunset's humiliation forgotten. They decided to make the most of their stinky situation, and got onto Rainbow's bed.

"Wanna feel my butt again?" said Rainbow.

Sunset began rubbing Rainbow's behind, eventually making a small brown stain appear on the back of her pants. Then, Rainbow let out a loud, wet fart, and the brown spot became bigger. Rainbow and Sunset laughed, and Sunset spanked Rainbow lightly.

"Do you want to feel my butt, or is it too messy for you?" said Sunset.

"It'll never be too messy for me!" said Rainbow Dash. Sunset turned around so her butt was facing Rainbow. Rainbow could see the big brown bulge on the back of her pants. She must have really needed to go. Rainbow felt Sunset's butt, squishing the big mess in her pants. Sunset decided she liked the sensation. Rainbow's hands were getting very dirty, but she didn't care.

Once most of Sunset's mess was squished against her rear, Rainbow spanked her lightly.

"I really need to pee," said Sunset.

"So do I," said Rainbow Dash, and she shamelessly let it all out in her pajamas, sighing of relief as her pajama pants became wet at the front.

She was only peeing for five seconds before Sunset started to pee as well, soaking her already-dirty pants and loving the warm, wet release, as well as the naughty feeling of it.

Once both girls had finished wetting themselves, they spanked each other lightly some more, before they took a long shower, changed into a clean pair of pajamas (Rainbow had several spare sets of them), cleaned up the bed, and went to sleep.