Author's Note

This contains a similar scenario to a story on derpibooru (but with wetting, messing, and farts added in). It's not the same story, just a similar scenario that the author said I could use as long as I only share it with people who are also into that kind of stuff, which of course I always do unless people who dislike it click them despite reading the tags.

Dirty Raridash Bondage

Rarity woke up one morning. Rainbow Dash was over at her house. They had gone for a run together the previous afternoon, and Rarity had gone to sleep in the outfit she had been wearing then, a short skintight pair of purple shorts, and a matching midriff tank top. She sniffed her armpit. It didn't smell very pleasant.

"Rise and shine, Rarity!" said Rainbow Dash, who was wearing a white T-shirt and a skintight pair of black shorts that went down halfway to her knees. She had also gone for a run and slept in this outfit.

As Rarity sat up, Rainbow positioned her butt in front of Rarity's face. It didn't smell much better than Rarity's armpit.

PPPPPPPPPFFFFRRRRRRT!

"Rainbow Dash!" said Rarity, while Rainbow laughed at her own fart.

After Rarity had gotten up, used the bathroom, and brushed her teeth, she still didn't change out of this smelly outfit yet.

"So Rarity, when are you gonna do that thing I asked you to do?" Rainbow asked.

"Very soon," said Rarity.

Rainbow tiptoed behind Rarity, reached into her shorts, and gave her a wedgie.

"Yaaah!" said Rarity, blushing at her underwear being exposed.

"Nice panties, Rarity," said Rainbow, staring at Rarity's slightly dirty light blue panties. She then released them, and they snapped against her butt. "Feel like doing it yet?"

"Be patient," said Rarity.

After breakfast, Rarity got Rainbow Dash a 2-liter bottle of cider. Rainbow drank it down as fast as she could. Seconds later she started to feel sleepy. "What's going on?"

"Oh, that might be the sleeping pills I put in the cider," said Rarity with a smile as Rainbow fell asleep.

When Rainbow woke up, she was laying facedown in a patch of dirt in Rarity's backyard. Her hands were tied behind her back and her feet were tied together and hogtied to another rope tying her upper legs together. Her shoes and socks had been removed and were laying next to her.

"Rarity? Did you do this?" Rainbow struggled against her bonds, but Rarity had tied them tight, though not tight enough to cut off her circulation.

After about half an hour, Rarity returned, still in her athletic outfit, and dripping with sweat. "Splendid, you're awake. I was just going for a run while I was waiting for you to wake up. So I apologize if I smell rather unpleasant." Rarity removed her shoes, set them down, then she removed her socks and stuffed them in Rainbow's mouth.

"Mmmmppphhh!" Rainbow could taste Rarity's sweat on the socks and could only breathe in through her nose, taking in the smell.

"What shall I do to you first?" Rarity said. "First, you need to be punished for farting in my face, giving me a wedgie, and playing in the mud while wearing the new dress I made for you!" Rarity sat firmly on Rainbow's head. Her butt was soaked in sweat and her shorts smelled nearly as bad as her socks. Rainbow let out another muffled groan. Rarity then raised her hand and slapped Rainbow's butt. She spanked her again and again. Rainbow blushed lightly and let out some muffled screams as her rear end was spanked repeatedly.

After about ten minutes of this, Rainbow farted loudly. FFFFFRRRRRRT!

"That just earned you more spanks," said Rarity, and she swatted Rainbow's rear some more.

Another ten minutes later, Rarity finally stopped. Rainbow's butt felt like it was on fire and her head was still under Rarity's butt, being forced to smell her stinky shorts and her socks in her mouth.

"Now, you are very ticklish, are you not?" Rarity said.

"MMMMMMHHHH!" Rainbow struggled a bit, dreading what was to come.

Rarity started tickling both of Rainbow's feet with her hands, still sitting on her head.

Rainbow let out more muffled screams that would have been laughter. She was stuck in this position, unable to even kick her legs, as Rarity tickled her mercilessly.

After an hour of tickling, Rarity finally stopped. Rainbow was as soaked in sweat as Rarity at this point.

"Phew, all that tickling is making me hungry and thirsty," said Rarity, wiping the sweat off her forehead. "I'm going to get some lunch. When I get back, you can drink some cider, and then we will continue." Rarity stood up and walked into her house.

Rainbow struggled some more against her bonds. The dirt under her was starting to turn into mud from her sweat. She tried to get free, but all she could do was fart.

Half an hour later, Rarity returned with a large glass of cider and a straw. She pulled her socks out of Rainbow's mouth and held the cider up to Rainbow. Rainbow didn't hesitate; she drank the cider as fast as possible. It tasted so refreshing between how hot and sweaty she was and having had Rarity's dirty socks in her mouth for over an hour.

Once she finished her cider, Rarity put her socks back in her mouth and sat back on her head. Once again Rainbow got a very unpleasant whiff of Rarity's sweaty shorts and rear end.

She sat still for five minutes, and then...

FFFFFFFFRRRRRRRRRT!

"MMMMMMMMPPPHHHHH!" Rainbow squirmed some more. She could not believe Rarity had just farted on her. And with the socks in her mouth, she could only breathe in through her nose, so she got a full whiff of Rarity's fart.

"Excuse me," Rarity said, speaking in a ladylike voice despite what she had just done. "I had two big plates of beans for lunch so I'm quite gassy. I may have put fart powder in my own cider."

Rarity let out a series of short, loud wet farts, and Rainbow was forced to smell them all, letting out muffled groans and squirming.

Half an hour in, Rarity let out a loud, long, deep-pitched fart that Rainbow, who had farted like this before, would never have imagined could come out of someone like Rarity.

BBBBBBBBBBBBBBRRRRRRRRRRRRRRRRRRT!

"How do you like being face-farted?" Rarity asked with a naughty smile. A short, wet fart made its way out of her.

"Mmmmmmmhhhhhh!" Rainbow said. Rarity's farts smelled more foul than her own.

Rarity farted for about one hour total before she finally stopped. She stayed in her position with her tushie on Rainbow's head, and though the air became clean of the fart smell, Rarity's shorts now smelled like farts, in addition to sweat and body odor.

About half an hour after Rarity stopped farting, Rainbow let out more muffled screams and started fidgeting hard. After about a minute, Rarity removed her socks from Rainbow's mouth to see what Rainbow had to say.

"I have to go to the bathroom!" said Rainbow. She wasn't kidding, for the cider she had drank had gone through her.

"You'll just have to hold it," Rarity said. "I'm not done with you yet."

"But I REALLY have to go!" Rainbow fidgeted some more.

"Hold it or go in your shorts." Rarity put her socks back in Rainbow's mouth.

Rainbow fidgeted where she lay. She had to pee really badly, and in her position she couldn't even hold herself or cross her legs. As the minutes went by, her urge to pee grew more and more intense.

Rarity let Rainbow squirm for half an hour, and then, without warning, she started licking her sweaty feet.

"MMMMMMMMMMMMPPPPPPPPPHHHHHHHH!" As Rarity tickled her feet with her tongue, Rainbow couldn't hold it any longer. She started peeing her stinky shorts like a race horse. Her stream was so strong Rarity could hear it over her muffled screams. The dirt below Rainbow's crotch got even more muddy, and her shorts got even more soaked.

Even after Rainbow finished peeing a minute later, Rarity kept tickling for another hour. By the time she stopped, Rainbow was so sweaty, and the dirt under her so muddy, that if not for the pee smell, you wouldn't even be able to tell she wet herself.

"Now, for wetting yourself you need another spanking." Rarity spanked Rainbow some more for another ten minutes. Once the spanking was done... "I need to use the bathroom rather urgently as well." To Rainbow's surprise, Rarity sat on her butt, and then Rainbow felt a warm wetness on her butt. Rarity sighed of relief as she peed in her shorts.

Rainbow couldn't believe Rarity was deliberately wetting herself. She shuddered a bit at the wetness soaking her already-wet shorts.

When Rarity finished peeing, she sat back on Rainbow's head again. Not only did Rarity's shorts stink but they were now soaked with pee.

Several hours went by, during which Rarity alternated between tickling Rainbow Dash and spanking her, getting up only to get some drinks for herself and Rainbow. At some point, Rainbow peed again while Rarity tickled her, which she would always do for an hour straight.

At about lunchtime, Rarity got off Rainbow's head and went into the house, leaving Rainbow tied up in the mud in her wet shorts for about half an hour. Then, she returned with a plate of chili and a glass of prune juice. She removed her socks from Rainbow's mouth.

"Is that chili and prune juice?" Rainbow asked. "Those give me really bad diarrhea."

"I know," said Rarity, slapping Rainbow's butt.

Rarity fed Rainbow the chili with a spoon and then let her drink the prune juice through a straw. Once Rainbow had finished, Rarity put her socks back in Rainbow's mouth.

"I hope you can hold it longer than you can hold your pee," said Rarity. "You're going to be here for a very long time!" She sat back on Rainbow's head and let out a long, loud, wet fart.

In only five minutes, Rainbow Dash was farting non-stop. She was able to find fun in this. But soon her farts grew wetter and stinkier.

"Phew, Rainbow Dash," said Rarity, fanning the air but smiling. "Careful you don't soil yourself." She patted Rainbow's butt.

"Mmmmppphh!" said Rainbow, who didn't bother to struggle yet.

After a particularly wet fart, however, Rainbow started squirming. She needed to go really bad and she knew how messy this diarrhea was going to be. If it wasn't liquid it would have been enough to clog the toilets, and she'd usually go through half a roll of toilet paper wiping. Once she had run out of toilet paper and her shorts and underwear had gotten very dirty at the butt and needed to be washed even after she had gotten the toilet paper she needed. But she knew this would be a lot messier.

"MMMMMMMHHHHHHH!" FFFFRRRRRT!

"If you can't hold it, you'll just have to go in your shorts. They're already filthy and smelly." Rarity patted Rainbow's butt again and let out a wet fart of her own.

"Mmmmhhhggggg..."

PPPPPPBBBBBBBRRRRRRRRT!

Rainbow noisily made a big mess in her shorts. She groaned as a big brown bulge appeared on her butt, and a bit of diarrhea ran out of the leg holes of her shorts.

"Ooh, you dirty, stinky girl," Rarity said, patting Rainbow's butt some more as she pooped her shorts.

It wasn't long before Rarity's farts became wetter and stinkier. Rainbow squirmed a little more. It suddenly crossed her mind Rarity ate the same thing she did so she might need to go too. Rarity had been very dirty today but surely she wouldn't...

PPPPBBBLLLLRRRRRRRRT!

Rarity sighed of relief as she soiled her shorts with diarrhea.

"MMMMMMMMMPPPPHHHHH!" Rainbow could smell it clearly and some of it was leaking onto her head.

A minute after Rarity finished soiling herself, she sat on Rainbow's butt and wiggled it around. Rainbow felt the mess squish between both their butts. She felt absolutely dirty. Both girls let out wet farts over the next half hour, and then Rarity sat back on Rainbow's head.

They stayed in this position, with Rarity tickling and spanking Rainbow some more, until it started to get dark, then Rarity stood up. "I need to change my shorts before I go to bed," she said. She let out a sloppy wet fart and soiled herself more.

"Mmmmhhhhh," said Rainbow Dash as Rarity walked away. She also let out a sloppy wet fart, soiling herself more. Her shorts were wet, smelly, and filled with poop.

When Rarity returned, she was wearing some fluffy pink pajama pants. However, she was carrying her soiled underwear. She removed her socks from Rainbow's mouth.

"I really need to be changed," said Rainbow.

"Yes you do," said Rarity. "Drink one more cider before you go to bed." She held out a glass of cider in her other hand.

After Rainbow drank the cider, Rarity put her soiled panties on Rainbow's head.

"Holy cow, that really stinks, Rarity!" said Rainbow. Her nose was assaulted by the full stench of the mess in Rarity's underwear.

"Pleasant dreams," said Rarity, and she walked into the house.

Rainbow lay in this position, facedown in the mud, in wet, soiled shorts, and with soiled panties on her head. She let out several wet farts, some of which were sharts, and peed twice more before finally falling asleep.

She woke up to a warm, wet feeling on her back. Someone was sitting on her back wetting herself, and she didn't have to think hard to guess who.

After Rarity finished peeing she removed her soiled underwear from Rainbow's head and positioned her butt in front of it. She was wearing her soiled shorts again, but must have been wearing new panties underneath for obvious reasons.

"I believe we are done," said Rarity, and she untied Rainbow Dash.

"Wow, Rarity, I didn't know you had it in you," said Rainbow.

"Well, you asked me to do the kinkiest thing to you that I could think of. You said you could take it, whatever it was. None of it was too much, was it?"

"No, it was awesome! I just didn't expect it from you. I hope you didn't find it too unpleasant. Especially the soiling yourself."

"I may seem like a lady, but I am far more dirty and unladylike inside. You're the first to see that side of me, and I enjoyed all of that as much as you did. I hope that doesn't put you off?"

"Not at all! It just makes me like you more!" Rainbow slapped Rarity's butt.

Rarity giggled. "Now, you really need a bath. You smell rather foul."

"You got that right," Rainbow said with a smile.

They walked to the bathroom, Rainbow waddling with the big mess in her soiled shorts. Rarity rinsed the mess out of Rainbow's shorts, then filled the tub with warm, soapy water. She sat in the tub with Rainbow, as her shorts were also soiled. She scrubbed Rainbow all over, spending extra time on her butt, and she also let Rainbow scrub her butt as well. Both Rainbow and Rarity farted in the tub, and in each other's faces during butt scrubbing, which made them laugh.

By the time Rainbow was dry and clean, her shorts still smelled but she didn't mind. She and Rarity had a fun, though less fetishy time for the rest of the day.