It was a few days after Rarity and Applejack returned from their camping trip. Today, they both finished their work before 3:00, and planned to spend the rest of the day together.

First, they walked through the woods, Rarity sniffing Applejack and her dirty outfit every chance she got. Rarity saw some berries growing on a bush to the side, and ate them. They tasted a little funny to her.

After enjoying the walk, they returned to Applejack's house, where Rarity changed into her exercise outfit, and they did some situps, and then some stretches.

Until Rarity suddenly felt an intense pain in her stomach, and groaned.

Applejack, who had gotten a sudden urge to pee, was just about to head to the bathroom when she heard Rarity groan. "You all right, sugarcube?" she asked, looking concerned.

"I'm having a terrible tummy ache."

"Lay down on mah bed and I'll see what ah can do."

Rarity ran into Applejack's room and laid down on her bed without hesitation. She lay curled up, the pain in her gut so intense she was tearing up a little.

"Did you eat anythin' weird today?"

"Not really," said Rarity. "Wait..." She tried to think in spite of the pain. "Those berries I ate on my walk did taste funny."

"Phew," said Applejack in relief. "If that's all, I've got just the thing."

Applejack walked out the room. She came back with a small glass of something yellow.

"Drink this. It'll make your stomachache go away lickety split!"

Rarity drank it. "It tastes like apple juice, not medicine. Are you sure it'll help me get better?"

"Those berries you ate were rotten. Ah ate some once too, and ah recovered. But this'll speed it up."

"What do you mean, speed-"

She was interrupted by a gurgling in her stomach, which then started to feel a bit lower. A few seconds later, she let out a short, loud fart.

"Feel better?" said Applejack.

"A bit," said Rarity, noticing her pain had decreased a little.

"Good. Let it all out, Rares."

Rarity lay on her side facing away from Applejack. She moved one leg so it was like she was lifting her leg if she had been standing up.

FFFFFFFRRRRRRRRRRRT!

Applejack felt aroused watching Rarity fart in this position, in her skintight, already-smelly shorts. Part of this might have had to do with needing to pee, rather badly now, but right now she was focused on making Rarity feel better and her subsequent gassiness.

Then Rarity got on all fours and positioned herself with her rear end in the air, facing Applejack.

BBBBBBBBBRRRRRRRRRRRRRRT!

"Phew," said Applejack, fanning the air with her hat. "That smells worse than when ah messed in mah shorts."

"Oh," said Rarity. "Was that... terribly unpleasant?"

"It wasn't too bad. It smelled somethin' awful, though."

Rarity let out another loud fart, except this one was higher-pitched, and a bit longer. Then she lay on her back and lifted both her legs into the air, bending her knees to get them as high as possible, with her behind still facing Applejack.

PPPPPPPPPPPPPRRRRRRRRRRT!

Rarity sighed in relief. She was starting to feel much better.

Applejack was so excited to see Rarity farting so loud that she started to pee in her shorts. Normally she would have noticed the warm wetness trickling down her legs, but she was too transfixed by Rarity.

After two more boisterous farts, Rarity got back on all fours. "Would you like to help squeeze these farts out?"

"Would ah ever!" Applejack finished peeing and started to massage Rarity's butt. She loved how soft it was, and the way it smelled. Though of course she could barely smell Rarity's outfit over her farts.

Rarity farted several times, even now a little nervous that the smell might drive Applejack away, but Applejack still seemed to like the smell of her farts.

After a few minutes, Rarity's gas was gone, and so was her stomachache.

"I'm all better now," said Rarity. "What was that you gave me?"

"Just some apple juice with fart powder in it. You'd have farted it all out eventually like ah did, but this just sped it up."

"Thank you, Applejack." Rarity gave her a hug, and noticed her wet shorts for the first time. She giggled. "Were you that excited to see me fart?"

"You bet." Applejack chuckled.

They hung out inside the house for the rest of the day, with Applejack cooking some baked beans and apple pie for herself and Rarity a little later in the evening, by which time Applejack's shorts had nearly dried.

They sat on the couch watching sports on TV when two feelings hit both Rarity and Applejack.

"Applejack, darling, could you lay facedown on the floor?" said Rarity.

"Sure," said Applejack, looking forward to what Rarity was going to do to her.

As soon as Applejack was laying facedown, Rarity sat on her butt. She let out a loud fart, which Applejack could feel vibrating against her. Then Rarity began peeing, soaking both her skintight shorts and Applejack's stinky jean shorts. Applejack moaned in pleasure.

"Can you get up?" said Applejack after about 10 seconds. "I gotta go to the bathroom." She knew what Rarity's response would be, but it was always more fun to pretend.

"You're already wet, so just go in your shorts." Rarity giggled.

Applejack chuckled, and sighed as she also began peeing herself for the second time today. The puddle under her grew bigger. Before she was done peeing, she let out a loud, deep-pitched fart, causing Rarity to giggle.

They farted on each other for several minutes due to the beans before they ran out of gas. Only then did Rarity stand up. Applejack stood up after her. Both their shorts were soaked in pee and smelled even worse than they had this morning. They laughed at the state they were in, and rubbed their butts against each other.

"Reckon we should dry off before bed?" said Applejack.

"No, let's sleep the way we are," said Rarity. "We're only going to get wetter in the morning."

"Sounds good."

The whole rotten berries and farting thing of course was inspired by something Donkey said in Shrek.