Rainbow Dash had just finished winning an aerial race against Lightning Dust. She was wearing her Equestria Games outfit: A yellow tank top and skintight white shorts. She was exhausted and sweaty, so she flew to Sweet Apple Acres, where Applejack had set a whole barrel of cider specifically for her. What Applejack didn't know was that Rainbow Dash had put an entire container of fart powder into the barrel.

Rainbow Dash took a mug, filled it with cider from the barrel, and downed it in one gulp. She continued to do so until the barrel was empty. This was an awful lot to drink, but she could never get enough cider!

Rainbow waited patiently, and then, to her delight, she felt extremely gassy. She let out a loud, wet fart, and giggled. She thought it was absolutely fun to fart, and that farts were funny. Dashie let out an airy fart after that, then a louder fart. She paused for a minute, then...

PPPPPPPPPPPPFFFFFFFRRRRRRRT!

Rainbow fell on her back and laughed hard at the wet fart that had just come out of her. She laughed so hard she accidentally let a few more farts - which only made her laugh harder.

After farting several times for five minutes, Rainbow Dash felt the biggest fart coming. She wanted someone else to hear this! She considered flying to Pinkie Pie, who found farts as funny as she did, but she wasn't sure she could hold it until she got there. Rarity was off in Manehattan, and Twilight was off on a friendship mission with Fluttershy. Applejack was closest, if she was here, so she'd have to settle for her.

Rainbow Dash looked inside the barn and saw Applejack taking a nap, after a hard day's work. Rainbow Dash positioned her behind directly in front of Applejack's face.

BBBBBBRRRRRRRRAAAAAAAAAAAAAAAP!

A loud, boisterous fart exploded out of her rear. Applejack woke up, and gagged at the stench while Rainbow Dash fell on her back and laughed harder than she ever had this day. She farted a few more times, which, again, made her laugh harder.

"Ugh, Rainbow!" said Applejack. She wasn't offended by farting but she didn't find it funny, and this was absolutely disgusting. But at the same time, she did find it arousing for another mare to fart in her face, especially Rainbow Dash...

"Lighten up!" said Rainbow Dash once she had stopped laughing. "You should see the look on your face!"

Applejack was fanning the smell away with her hat. "What in the hay did you eat?"

"I put an entire box of fart powder in that barrel of cider you gave me, and drank it all!" Rainbow looked very proud of herself.

"Ah'm gonna have to punish you for that." Applejack grabbed a nearby lasso. Rainbow Dash realized what Applejack was about to do and tried to fly away, but Applejack wrapped the lasso around her back legs, tying them together and forcing her face first to the ground. Applejack tied the other end of the rope to a post, then grabbed another rope and tied Rainbow Dash's front hooves together. Then she tied her wings to her sides.

"What are you doing?" said Rainbow Dash, struggling against her ropes.

"Givin' you your punishment," said Applejack, who was blushing lightly. She walked over to Rainbow Dash's rear end. The fart smell had cleared by now, but Dashie's shorts still smelled like farts. Applejack sat down, put Rainbow Dash over her knee, raised her right hoof, and slapped Rainbow Dash's butt as hard as she could.

"Ow!" said Rainbow Dash.

Applejack spanked Rainbow Dash 30 times in total. Rainbow Dash started whimpering after the thirteenth swat. By the time it was over, Applejack set Rainbow Dash back on the ground and looked at her with a satisfied look on her face. Rainbow's butt hurt, and she couldn't even rub it because both her sets of hooves were tied together.

Applejack knew Rainbow Dash didn't mind other ponies putting their hooves on her butt in any way, including slapping it, aside from the pain that came with this one, which she had coming for farting in her face. But Applejack still enjoyed this a little too much.

"All right, you gave me my punishment, can I go now?" said Rainbow Dash.

"Sure," said Applejack.

Suddenly, Queen Chrysalis flew in and cast her mind-control spell. Applejack resisted, but soon her eyes were tinted green.

"I can't put you under my total control in such a short amount of time," said Chrysalis. "But I can let your darkest desires take hold. I saw how much you enjoyed slapping her rear end, even if she didn't think much of it. Now you will not hold back on forcing your darkest fantasies on her!" She flew away laughing maniacally.

Rainbow Dash was very nervous. "What's that supposed to mean?" she said, accidentally farting loudly.

Applejack turned toward Rainbow Dash, who saw the tint of green in her eyes. "On second thought, I'll leave you like this until three days are up."

"Three days?!" said Rainbow Dash, beginning to panic and trying to pull herself free of the ropes, but Applejack had tied them tight.

"Don't worry, I'll give you some cider," said Applejack.

"What if Apple Bloom, Big Mac, or Granny Smith come in?"

"They're away on a trip. They'll be gone a week. I stayed behind to look after the farm, but I've done most of my work already."

"You don't have to do what Chrysalis says," said Rainbow Dash. "Can you please let me go?"

"Nope," said Applejack, slapping Rainbow's tush. Rainbow Dash farted again, but this time she didn't laugh.

...

An hour later, Rainbow Dash's butt was feeling better, but she really needed to pee. She had, after all, drank an entire barrel of cider.

"Applejack! I have to pee real bad!"

"You'll just have to hold it," said Applejack, blushing and trying hard not to grin. She had expected this to happen, and couldn't resist from a combination of Chrysalis's spell and Rainbow farting in her face.

"I'm serious! I REALLY need to go!"

"Should've thought of that before you farted in my face."

"I'll never do it again! Please let me go!"

"No can do, sugarcube."

"Then can you at least pull my shorts down?"

Applejack walked behind Rainbow Dash. Rainbow felt relieved for a bit. Sure, she'd still be peeing in front of Applejack, but at least her shorts would stay dry.

Then Applejack slapped Rainbow Dash's butt hard. Rainbow Dash let out a whimper as she leaked a bit into her shorts. She desperately tried to hold the rest of it in as Applejack swatted her four more times. With her hooves tied, Rainbow was unable to hold herself or even cross her legs, making her very uncomfortable.

Somehow she managed to hold it for about an hour, by which time Applejack needed to pee, and Rainbow Dash was really fidgeting, trying to untie herself to no avail. Applejack lifted her leg and began peeing on the barn floor, in full view of Rainbow Dash, sighing of relief.

This was too much for the pegasus. Rainbow Dash began wetting herself uncontrollably, blushing with embarrassment as she felt the warm wetness soak her shorts and form a puddle under her. She couldn't deny that the relief felt wonderful, but this was overridden by the humiliation of peeing herself in front of Applejack. At this point her front legs were resting on the ground in front of her, and her back legs were positioned so her behind was in the air.

Applejack, meanwhile, only peed for 10 seconds, keeping her back legs dry, and blushed profusely at the sight before her, every bit as satisfied as Rainbow Dash was ashamed.

Rainbow Dash ended up peeing herself for a minute and 44 seconds. Applejack was impressed at this.

"Shame on you, wettin' your shorts like that," said Applejack, unable to hide her enthusiasm. She kicked Rainbow Dash in the butt as hard as she could.

Pain shot through Rainbow Dash's rear and tears flowed down her face. "Can you let me go now?"

"Ah said three days," said Applejack.

"Can you at least let me change?"

"Nope! You're stayin' in your wet shorts the entire time!"

Rainbow Dash moaned. But deep down, part of her enjoyed this...

...

A few hours went by, and Applejack at least moved Rainbow Dash out of the puddle she had made on the floor and cleaned it up. Rainbow hoped this meant she would let her change out of her wet shorts, but she didn't.

"Here," said Applejack. "Have some cider."

Rainbow Dash had to accept. Applejack held the cider mugs out and Rainbow Dash drank it as fast as she could, for she was thirsty and she loved cider! She knew this might make her wet herself again before this was over, but at the moment she didn't care. Applejack gave her a total of 10 mugs of cider. Maybe this wasn't so bad after all.

After ten minutes, Rainbow Dash farted loudly. Applejack chuckled. She loved seeing Rainbow fart, so much that she had spiked her last cider with fart powder.

Still in the position with her rear end raised into the air, Rainbow Dash released a series of loud, wet farts, some of which were long. She chuckled a bit. This made things a little more fun for her, and as long as Applejack didn't get behind her she wouldn't be punished for it.

Applejack stared the whole time, and after a particularly long fart, she couldn't help it. She ran behind Rainbow Dash and positioned her head right next to her butt.

"Applejack what are you doing? I can feel another big one coming!"

"Uh, I wanna see how determined you are to hold it," said Applejack, blushing.

She wasn't a very good liar. Rainbow Dash could tell Applejack wanted her to fart in her face. Probably so she'd have an excuse to spank her again.

PPPPPPPPFFFFFFRRRRRRT!

Rainbow Dash stopped trying to hold it in and farted in Applejack's face for seven seconds. She wasn't sure why. Was it because she knew Applejack was inevitably going to spank her again? Or... was it because she wanted her to?

"That'll be 30 spankings," said Applejack, and she slapped Rainbow Dash's butt with her hoof over and over again. She seemed to swat slightly lighter than before.

After the 22nd swat, Rainbow Dash accidentally farted, causing Applejack to spank her 10 more times. Her butt was sore for two hours after that.

...

By nighttime, she really needed to pee again. Applejack was asleep.

"Applejack!" said Rainbow Dash.

Applejack woke up. "What is it?"

"I really, REALLY have to pee!" Though she suspected she knew what Applejack's answer would be.

"Just go in your shorts," said Applejack. "Unless you think you can hold it for two more days."

"You don't want to have to clean up another puddle, do you?" Rainbow Dash was really fidgeting, a pained look on her face.

"Ah don't mind," said Applejack, blushing. She yawned, but tried to stay awake so she wouldn't miss this.

Two hours later, Rainbow Dash was still in desperate need of a bathroom but she hadn't peed yet since the last time. Applejack got tired of waiting and slapped Rainbow Dash's butt five times. Rainbow Dash held it in the entire time, but once Applejack resumed her original spot, the pain in her rear made it too hard to hold it in anymore. Rainbow Dash peed, turning her shorts from damp to wet, and making another big puddle on the floor. She blushed in embarrassment, but almost a minute later, she let out a sigh of relief when she was almost done. "Ah, that's better."

This part aroused Applejack even more.

"Well, good night," said Applejack once she was satisfied enough.

"Wait! Aren't you gonna clean this up first?"

But Applejack was already asleep. Rainbow Dash had to lay in her puddle of piss for the entire night.

...

The next morning, Applejack cleaned up the puddle. Every few hours she'd give Rainbow Dash a LOT of cider, and some apple pie. Sometimes she'd slap Rainbow's butt five times. By now Rainbow Dash smelled really bad. It was a hot day so she was sweating a lot, though she never got dehydrated because Applejack gave her so much cider. The fart smell still remained on her as well, but her shorts were saturated with pee.

Occasionally Applejack would put fart powder in Rainbow's cider, but resisted the urge to let her fart in her face again.

By this point, Rainbow Dash had stopped trying to break free of the ropes, knowing it was futile.

She had to pee again around noon. She knew Applejack wouldn't let her go, so she stubbornly tried to hold it as long as she could.

Applejack noticed her fidgeting and said "Just go. You're already wet, so it won't make a difference."

"I don't wanna pee myself again."

"Let me help you." Rainbow Dash thought Applejack was going to slap her butt again, but instead she sat on her back.

"Applejack, what are you..."

Rainbow Dash stopped as she felt her back, wings, and yellow tank top slowly become soaked. Applejack sighed as she peed all over Rainbow Dash.

Five seconds into this, the warm wetness was too much for Rainbow Dash, who peed herself yet again. Applejack could hear the hissing sound coming from her and knew this had done the job.

...

Rainbow Dash had to pee two more times that day, but this time she just let it all out, still ashamed beyond belief but not wanting Applejack to pee on her again, or slap her butt too hard.

She somehow got to sleep that night, as Applejack had cleaned up her most recent puddle, but she awoke to find herself in another puddle! She had peed in her sleep! She was even more ashamed at this, and Applejack was surprised and aroused. She patted Rainbow's butt lightly before moving her out of the puddle and cleaning it up.

About an hour later, another urge hit Rainbow Dash. "Applejack, I need to go!"

"You know what to do," said Applejack.

"Yes, I know, but... I don't have to pee this time."

"That don't change a thing."

"Peeing myself is one thing, but I can't stay like that until tomorrow morning!"

"Then hold it."

Rainbow Dash held it in for another hour, but after that, she couldn't hold it anymore.

PPPPPBBBBBBLLLLLLLTTTTTHHHH!

Rainbow Dash let out a loud fart, and released a very wet brown mess into her shorts. Applejack was even more aroused at Rainbow Dash's noisy accident.

Rainbow Dash had already smelled really bad, but she had been able to ignore it. Now the stench of her manure reached her nose, and she couldn't stand it.

...

She continued to lay there in her wet, smelly, soiled shorts for the rest of the day, wetting herself two more times before going to sleep. At least Applejack wasn't slapping her butt anymore.

She woke up next day, again in a puddle. To her dismay, Applejack was still asleep. Rainbow Dash waited impatiently for her to wake up. During the wait, she realized she had not peed herself all the way in her sleep, as she could still feel some liquid in her bladder. She probably could have held it, but she was already in a puddle, so what harm would this do? Rainbow Dash peed, secretly enjoying the feeling.

Eventually, Applejack woke up.

"It's been three days, but ah think ah'll leave you tied up for one more day."

Rainbow Dash looked into Applejack's eyes, tearing up a bit. Suddenly face to face with the pony she liked, Applejack shook her head, her eyes back to normal. Chrysalis's spell was broken. Applejack looked down at Rainbow Dash and blushed, feeling very ashamed.

"Oh my gosh, I'm so sorry, sugarcube," said Applejack. "Ah don't know what came over me."

"It was Chrysalis's spell," said Rainbow Dash. "It wasn't your fault."

"Ah didn't feel like ah was under a spell. Ah just felt so... never mind. If ah really was that way cause of a spell, I'll get her good for puttin' you through that."

Applejack untied the very wet and very smelly Rainbow Dash.

"Finally!" said Rainbow Dash, stretching her wings.

"You can have some cider if you want," said Applejack.

Rainbow Dash drank 14 mugs of cider without hesitation.

"Aren't ya gonna change out of your outfit and take a bath?" said Applejack.

Rainbow Dash hadn't even thought to. Despite her humiliation she kind of enjoyed the state she was in. She smelled like a combination of farts, sweat, pee, and manure, but she didn't mind as much as when she started. She blushed a little, giggled nervously, and stepped toward the bubble bath Applejack had prepared.

Then Rainbow Dash turned around and farted in Applejack's face. It was a loud, sloppy, wet fart, and Rainbow thought she might have added to the mess in her shorts. She blushed and did the best imitation of a smug, self-satisfied grin she could muster, winking at her.

"I'm tyin' you up for one more day," said Applejack, who couldn't hide her smile. She took the hint, and felt immensely relieved that Rainbow Dash actually wanted more of this instead of being angry at her for forcing it on her, even if she had been under a spell.

"I smell so bad right now that this counts as two farts," said Rainbow Dash, who didn't have enough gas left to fart again. "I think it should be two days. And if I fart in your face even one more time, you should pee on me and nowhere else until this is done."

"Deal," said Applejack.

"Curses!" said Chrysalis, watching from a distance and realizing her plan had backfired. She hadn't expected Rainbow to hold Applejack responsible for forcing her deepest fetishes on her, not when she'd cast the spell in front of her, but she had expected her to suffer all the same. She flew away, thinking one day she'd get her revenge.

Author's Notes:

Well... Told you it'd be extreme. I'll laugh so hard if someone says that was underwhelming. I had to work hard to get over my anxiety for this one, even after the last one.

I originally had Applejack do this of her own accord, but it was too stretchy and distasteful even by my standards so I added in Chrysalis's spell, because Applejack would NEVER do that to Rainbow Dash against her will, and if she did, that would be the end of her and Rainbow Dash's friendship.

As usual, even in this story I went soft at the end by having her enjoy it and such. No matter what I put them through in my stories I don't want them to suffer too much, not even here. It must be because I really like Rainbow Dash that I fantasize about her the most.

And I know, sorry for the repetition of the overused Lightning Dust race and Applejack representing the one with my fetishes.