Author's Notes:

My first chapter of The Extreme Fetish Series since merging them together.

I went for the Equestria Girls Rarity this time. I also included something else which I do have a secret interest in, but not as a fetish. Still, it could be a fetish to some!

It was a mild summer day, and Rarity was walking with Applejack, wearing her usual purple skirt.

When they went their separate ways, Rarity walked by a big tree.

A leg suddenly came out from behind the tree and tripped her. She fell flat on her face.

Adagio Dazzle came out from behind the tree. About a second later, so did Aria Blaze and Sonata Dusk.

"We're seeking revenge on the Rainbooms for taking away our power," said Adagio. "We'll start with you, and save Rainbow Dash and Sunset Shimmer for last. Sonata, hold her down!"

Sonata sat on Rarity's butt while Aria tied her feet together, and Adagio tied her hands behind her back. Adagio put some tape across Rarity's mouth, and the three sirens hauled Rarity to the back of their pickup truck. They got into the truck, with Adagio driving, and drove to their house, which was out of town.

As soon as they arrived, Aria and Sonata took Rarity out of the truck. Rarity struggled against her ropes, but it was no use. They had been tied tight.

The sirens set Rarity down on her side in their backyard. Which had a fenced in area with three horses, and a tremendous muddy field beyond the grass. Rarity cringed at the sight of it.

Adagio pulled the tape off Rarity's mouth. "I want to hear you squeal when we do this. Aria."

Aria put Rarity over her knee and lifted up her skirt.

"Nice underwear, Rarity!" said Sonata, giggling.

Rarity blushed, as the sirens could easily see her light blue panties.

Aria raised a hand and smacked Rarity's rear with it. Aria spanked Rarity again, and again, and again. Rarity whimpered with each swat, and Aria was clearly enjoying this.

After 30 swats, Aria stopped. Rarity's butt hurt more than any part of her had in her life.

"It might interest you to know," said Adagio, "that we have found some crystals containing Equestrian magic that came through the portal somehow."

Rarity looked up and saw that the Dazzlings were each wearing necklaces with a stone on it.

"These grant us powers different from before, but we can still work with it."

"Can I try?" said Sonata. "I know the perfect thing to do to her!"

"Your idea is so immature," said Aria.

"No, it's perfect for a prissy girl like Rarity," said Adagio. "Do your worst, Sonata!"

Sonata called upon the power of her crystal and cast a spell on Rarity.

Almost immediately Rarity could feel her stomach gurgling, and then pressure in her bowels.

"What in the name of Principal Celestia did you..."

PPPPPPPFFFFFFFFFT!

Rarity blushed at the loud fart that had come out of her. Sonata started to laugh.

"I'm telling you, it's not enough!" said Aria.

"Lighten up," said Adagio. "Look at how painful it is for her!"

BBBBBRRRRRRAAAAAAP!

"Reverse the spell at once!" said Rarity, still red in the face. "This is not a very ladylike thing for me to do!"

"But it's really funny!" said Sonata. "It's even funnier when prissy girls like you do it!"

"No, it is not!" said Rarity. "It's so..."

FFFFFFFFRRRRRRRRRT!

After her loud, wet fart, Rarity struggled against her ropes again, but they didn't get any looser.

PPPPPPPFFFFT! FFFFRRRRRRRT! PPPPBBBBBTTH! BRRRRAAAAAP! BBBBRRRRRRT!

Rarity felt more ashamed with each fart. Though, part of her liked the naughty feeling of farting so loud.

"We need something more," said Aria, and she rubbed her crystal necklace and cast another spell on Rarity.

Almost immediately, Rarity could feel a jolt in her bladder. She had to pee badly. But how? She had just used the bathroom before her walk with Applejack. This must be Aria's spell.

"Please, show you're still civilized and untie me!" said Rarity. "I need to use the bathroom!"

"We're not untying you until the end of the day!" said Adagio.

"I hate to admit it, but... nice one Aria!" said Sonata.

Rarity struggled against her ropes more frantically, hoping to pull herself free of them and use the bathroom without wetting her panties, let alone her skirt. But the ropes had been tied too tight. She was completely helpless.

She accidentally let out a few farts while trying to hold it in.

She could feel the pressure grow heavier. She really needed to go. She fidgeted harder and harder, but her desperation increased more rapidly than she had ever known. This must be part of the spell.

And then, Rarity could hold it no longer. She began to whimper as her panties grew warm and wet, and before long a wet spot appeared on her skirt that was rapidly expanding. Rarity was peeing in her dress. Sonata giggled, and Aria said "Ha!"

She peed for two minutes and ten seconds, and lay there in utter shame and disbelief that she had just wet herself.

Then, she let out a loud, wet fart that lasted 16 seconds.

"I've got a better idea," said Adagio, and she cast another spell on Rarity.

"Let me go!" said Rarity, tears pouring down her face.

"I will, when I'm satisfied!" said Adagio.

Before long, Rarity's farts started to get wetter and smellier. She could soon feel a different kind of pressure in her bowels. She trembled with fright, knowing what Adagio must have done.

"Untie me THIS INSTANT or you will know pain like you could never conceive of!"

"I think not," said Adagio as Rarity let out another wet fart.

And then...

PPPPPPPPBBBBBBBBBBTTTTTTTHHHHHHLLLLLLSSSSSSSSHH!

Rarity blushed again as she made a very smelly mess in her panties. Sonata fell on her back and nearly peed herself from laughing too hard.

They left her in her wet, messy state for about an hour, during which Sonata's farting spell wore off. During the hour Aria made her pee again.

"I have another idea," said Adagio. "She really hates getting dirty, right?"

They huddled together and whispered about something, which they seemed to agree on. They picked up Rarity and threw her into the mud. Rarity gasped, as her entire left side was now covered in mud.

Then Adagio drove her truck over to Rarity, positioning it so that she was just behind it. Adagio slammed the gas pedal. The truck wouldn't move, but its wheels did, splashing mud all over Rarity. Rarity coughed and spluttered and tried to wiggle free of her ropes, but it was still no use.

After about ten minutes, Adagio stopped. Rarity was now completely covered in mud. She had never felt so dirty in her life. She still had a much dirtier mess in her panties, which squished uncomfortably beneath her rear once Sonata got her into a sitting position.

"I think we've had our fun for today," said Adagio.

"Awwwwww," said Sonata.

"Now, let's hang her on a tree in front of some random person's house!"

Aria and Sonata threw Rarity into the back of their truck, pushed it out of the mud, and drove over to a house with a big tree in front of it. Adagio picked up a third rope, tied it around Rarity's legs, and then tied it around a strong-looking tree branch, hanging Rarity upside-down. Her very dirty panties were visible, though it was a little hard to tell because she was covered in mud.

Adagio threw a bucket of water on Rarity. It didn't clean her off completely, but at least made her panties easier to see. Then the sirens drove away.

Rarity was left hanging the entire night. She was wet, dirty, and smelled bad. She peed herself twice before day came, and Pinkie Pie and Applejack came out, Applejack having stayed over at Pinkie's house.

...

A week later, it was a much hotter summer day. Rarity was wearing a light blue tank top and short purple shorts. She walked by the tree again, and Adagio tripped her again.

Before long she was tied up once again in the sirens' backyard.

"This time we're gonna go more extreme!" said Adagio.

Aria lifted Rarity up and set her butt-first on a campfire the sirens had lit. Rarity shrieked in pain as her rear end was on fire. Eventually the fire went out, and the butt of Rarity's shorts was burned off so her purple panties were visible. Sonata giggled and cast the farting spell on Rarity so she let out a series of farts so wet that they made her underwear a little dirty.

"Let's not screw around with the basics this time," said Aria, casting the spell to make Rarity desperate to pee.

"Wait wait wait!" said Sonata. She took Rarity's shoes and socks off so she was barefoot, and then tickled both her feet. Rarity laughed so hard she wet her shorts within seconds.

Once Rarity was done peeing herself, Sonata quickly cast the pee spell on Rarity again, and started licking one of her feet while tickling the other with both hands. Rarity peed again for another minute, but Sonata kept licking and tickling after Rarity finished.

"I said no screwing around!" said Aria, casting the pee spell on Sonata.

Sonata merely giggled at the feeling of desperation. She stood above Rarity, hiked up her skirt, and peed through her pink panties all over her for two minutes. Rarity was disgusted by this. Once Sonata was done, Rarity was completely soaked with pee.

"That... was actually pretty good," said Aria. Sonata giggled.

Adagio cast the spell to make Rarity soil herself almost instantly, except it felt a lot wetter this time. Then the three sirens took the wet and smelly Rarity over to their three horses. Adagio cast a spell on the horses, and whispered something to them. The horses turned around so that their butts were directly above Rarity.

"No, you're not..." began Rarity.

She felt the manure cascade on her, getting all over her within moments. Rarity felt even dirtier than last week. She was covered in dung from head to toe and smelled really bad. This was so undignified for a lady.

"I wanna give her another golden shower!" said Sonata, casting the peeing spell on herself again.

Just then, Applejack came running in. She grabbed Adagio's feet, spun her around for about ten seconds, and threw her high up in the air. Applejack spanked Aria 30 times, which hurt a lot because she was wearing her necklace that gave her super strength, then threw her to the ground. Aria wet her pants as she lay rubbing her extremely sore butt. She was still peeing when Adagio fell to the ground, her pants also getting wetter by the second.

"Don't you ever do that to Rarity or any of the other Rainbooms again!" said Applejack as she took Adagio and Aria's crystals and crushed them. Both sirens nodded. Then Applejack turned toward Sonata, who wet herself out of fright.

"Hey, I won't do that to her again if they won't!" She took off her own necklace and stomped on it.

"You all right there Rarity?" said Applejack.

"What took you so long?" said Rarity, blushing from Applejack seeing her in this state again.

"My bike's a lot slower than their truck," said Applejack. "Fortunately Twilight's tracking device worked." She had planted it on the sirens' truck while they were tying Rarity up. After Applejack and Pinkie Pie had found Rarity in her messy state hanging from a tree branch, she had told them what the sirens had done, and they had been prepared to catch them should they try it again.

"I really wish you didn't have to see me like this."

"That ain't no problem." Applejack took a hose and sprayed Rarity with it. Rarity sighed in satisfaction as she felt the dirt wash off her.

It wasn't perfect of course; she still smelled bad, some of the mess remained in her panties, and she still had a hole in her shorts. Applejack chuckled at bit at the sight of Rarity's panties, but quickly stopped herself. She took Rarity back to her house and gave her a nice bubblebath. Rarity didn't bother to undress because she was already soaking wet and her outfit was still a little dirty.

Rarity farted in the tub, but she just giggled a bit. For some reason she didn't mind breaking wind in front of Applejack.

And... some part of her had found the entire experience arousing.