Author's Note

Another bondage story for Fluttershy, but it will be similar to the Raridash one, only inside. Also Fluttershy's in pink boyshort panties for the whole session.

Dirty Flutterdash Bondage

Fluttershy and Rainbow Dash were hanging out at Rainbow's place one day. Fluttershy had the whole weekend off and wanted to spend it with Rainbow Dash. They were both wearing their original outfits.

"So, what do you want to do?" Rainbow asked as she finished drinking a bottle of cider.

Fluttershy finished her cider. Her heart was beating fast. She and Rainbow Dash were more than just friends now, and there was something she wanted to tell her, but she wasn't sure how Rainbow would react. "Um... Dashie?"

"Yes, Fluttershy?"

"There's... something I want to tell you."

"What is it?"

"Actually, never mind."

"You can tell me anything."

"I can't. You'll think it's too weird."

Rainbow Dash farted loudly. "Trust me, there's nothing you could tell me that would weird me out."

"Well... if you're sure..." Fluttershy told Rainbow what was on her mind for the last several days.

"Whoa," said Rainbow.

"I told you," said Fluttershy, blushing beet red.

"I didn't mean it like that! You just surprised me. I didn't expect it coming from you."

"You're not... weirded out?"

"Of course not! You think something like that would bother me? After I pranked Sunset with fart powder and made Pinkie wet the bed? Besides, I love everything about you."

Fluttershy smiled, still blushing.

"How would you like another cider?" Rainbow asked.

"Yes, please," said Fluttershy.

Rainbow went to the kitchen and returned with two more bottles of cider. She handed one to Fluttershy. As Fluttershy drank it, she felt a sense of relief. Rainbow still loved her even after finding out her darkest secret. No sooner had she finished her cider, did her vision go blurry and she blacked out.

The next thing she knew, she was laying facedown on the living room floor. Her hands were tied behind her back, and her legs were tied together. Also, there was a filthy, sweaty, stinky pair of socks in her mouth. Unable to breathe through her mouth, she was only able to breathe through her nose and smell them.

"Ah, you're awake," said Rainbow Dash. She sat to the side, now wearing only her white T-shirt and her skintight black shorts. "Sorry about the dirty socks. I went for a run before you woke up."

"Mmmmh?" Fluttershy said.

"Nice underwear, Flutters," Rainbow said, walking over to Fluttershy and slapping her butt.

Fluttershy realized that her skirt had been removed and her tight pink boyshort panties were exposed, although her white tank top was still on. She blushed beet red at being in her underwear, and struggled against her bonds.

"I tied them real right, so you're not getting out any time soon," Rainbow said. "How would you like some cider?"

"Mmmph!"

"I'll take that as a yes." Rainbow exited the living room and returned with four bottles of cider. She drank two of then and then removed the socks from Fluttershy's mouth. She held one of the two remaining bottles of cider up to Fluttershy and helped her drink it.

Fluttershy enjoyed the refreshing taste of the cider after having dirty socks in her mouth. Once Fluttershy was done this cider, Rainbow held the second bottle of cider in front of her, and she drank it. She let out a loud belch and blushed. "Excuse me."

"You don't have to say that around me," said Rainbow Dash. "I fart real loud and with pride! And now that you're done your cider, these are going back in your mouth." Rainbow put her dirty socks back in Fluttershy's mouth.

About five minutes later, Fluttershy felt a gurgling in her stomach and then an all too familiar pressure inside her. She tried to hold it. She was way too shy to fart in front of anyone. Only once she knew no one could hear or smell it would she fart, even though her farts were almost always silent.

"If you have to fart, just let it out," said Rainbow Dash, smiling, for she had put a lot of fart powder in the cider.

Fluttershy squirmed for a bit. She could just let it out silent, but she couldn't do it when someone was around, they'd surely smell it. And then...

FFFFFRRRRRRRT!

Fluttershy blushed beet red at the loud fart that had come out of her.

"Excuse you, Fluttershy!" Rainbow said, patting Fluttershy's butt.

"Mmmhhhh!" Fluttershy wiggled her butt a bit, and then a long airy fart made its way out of her.

"Phew, Fluttershy!" said Rainbow. But she sniffed deeply rather than fanning the smell away.

Fluttershy blushed as she let out a series of short, wet farts, stinking up her pink boyshort panties. She felt so dirty, farting in her underwear in front of Rainbow Dash. She was able to hold it for a while after that, then...

BBBBBBBBBRRRRRRRRRRRRRRT!

Fluttershy's face grew even redder as this loud, long, deep-pitched fart made its way out of her rear. This was a very unladylike sound, and it made her feel like such a naughty girl.

"Wow, I never knew you had it in you to fart like that," said Rainbow Dash, slapping Fluttershy's butt. "And by the way... you're not the only one who drank cider with fart powder in it." Rainbow sat firmly on Fluttershy's head. Her shorts were still damp with sweat and smelled a little.

BBBBBBBBRRRRRRRRRRRRRAAAAAAAAAAAAAAAP!

Rainbow sighed as she let out a long, loud, explosive wet fart that lasted almost 20 seconds.

"Mmmmmmhhhhhh!" Only able to breathe through her nose, Fluttershy caught a very unpleasant whiff, though she had to admit to herself, her own farts smelled slightly more foul. Nevertheless, she squirmed hard, struggling against her bonds even more, but Rainbow had tied them tight.

As Rainbow Dash farted on Fluttershy, Fluttershy farted for the next half hour. Eventually, they both ran out of gas. Fluttershy continued to breathe in the foul smell through her nose, and even when it was finally gone, Rainbow's shorts still smelled of farts.

Rainbow stood up. She walked over to Fluttershy's butt and sniffed it. "Phew! Your underwear really stinks!" Rainbow slapped Fluttershy's butt. Fluttershy let out a muffled squeal.

A few minutes later, a pressure of an even worse kind hit her. She had to go to the bathroom. All the cider she had drank had gone through her. She fidgeted where she lay, letting out muffled sounds.

"I'm guessing you have to pee after drinking all that cider," said Rainbow with a smile. "You'll be here for a while, so you'll have to hold it."

"Mmmmhhhh!"

As the minutes went by, Fluttershy's need to pee got even worse. She squirmed harder. She couldn't even cross her legs or hold herself. It didn't help that her pink boyshort panties were very tight. "MMMMHHHHHH!"

"If you don't think you can hold it for several more hours, just go in your underwear," said Rainbow. "A dirty girl like you shouldn't have a problem doing that!" She slapped Fluttershy's tush again.

Fluttershy blushed at Rainbow's words. Her heart was also beating very fast. If Rainbow didn't untie her soon she'd have an accident in her underwear.

She squirmed and held it for another ten minutes. By now she really needed to go. A minute later, her bladder gave out. She stopped fidgeting as she felt a warm wetness spread through the crotch of her boyshort panties. "Mmmmmhhhhh..." She blushed beet red as she peed in her underwear, and a puddle rapidly grew under her. She could smell the pee smell, hear the hissing sound... How dirty she felt, wetting herself in stinky underwear in front of Rainbow Dash.

"Aw, did Fluttershy go potty in her underwear?" Rainbow said. Fluttershy's face grew even redder. She farted in the middle of peeing.

Fluttershy peed for about a minute before she finally stopped. She was laying in a smelly puddle and her front half was soaked, especially her underwear.

"You know, I really have to pee too," said Rainbow. She squatted over Fluttershy and peed like a race horse through her shorts. Fluttershy let out a muffled moan as Rainbow's powerful stream soaked her back. As Rainbow peed, she moved over Fluttershy's head, making sure her hair was completely soaked, and then moved to her lower half, soaking them too. By the time Rainbow finished peeing, Fluttershy was drenched in pee, there wasn't a single dry spot on her.

"Did you like that, Fluttershy?" Rainbow asked.

Fluttershy let out a wet fart in response. Rainbow chuckled and patted her butt.

Hours went by. Rainbow would occasionally give Fluttershy more cider, and half the time it would have fart powder in it. Soon Fluttershy needed to pee again. She held it as long as she could but she ended up peeing herself again, and Rainbow gave her another golden shower through her already-wet shorts.

When supper came, Rainbow gave Fluttershy a salad with some sliced prunes in it, and more cider with fart powder to go with it.

Soon, Fluttershy was farting up another storm. But as the minutes went by, her farts became wetter and stinkier.

"Phew, that really stinks!" said Rainbow Dash. "You'd better find a bathroom quick before you have an accident."

"Mmmmmhhhhh!"

"Oh, that's right, you can't!" Rainbow slapped Fluttershy's butt, forcing an explosive wet fart out of her.

Fluttershy squirmed and farted for about ten more minutes, and then she noisily made a mess in her wet underwear. She moaned as she felt her panties fill with hyperscat and a smell even more foul than her farts entered her nostrils.

Rainbow saw the brown bulge form on Fluttershy's butt. "Looks like you couldn't hold it, you dirty, stinky girl." Rainbow slapped Fluttershy's messy butt. Fluttershy moaned.

Then Rainbow sat on Fluttershy's butt and filled her shorts with explosive diarrhea, sighing of relief. She wiggled her butt around, feeling the mess squish between them.

Fluttershy moaned as she also felt the squishy feeling. PLORP! She let out a sloppy wet fart and soiled herself a little more.

After about half an hour of Rainbow sitting on Fluttershy's butt, Rainbow peed. The sudden wetness made Fluttershy pee as well.

Eventually, bedtime came.

"I hope you're enjoying this," said Rainbow. "Because you're gonna spend all night in this position. I'll untie you, change you, and wash you tomorrow." Rainbow waddled to her bedroom in her messy shorts and climbed right into bed.

Fluttershy lay in her wet, soiled underwear all night. She peed twice and soiled herself again before finally falling asleep.

She woke up to a loud fart in her face. Rainbow's butt, still in her soiled shorts, was right in front of her. She took one whiff and moaned.

"Good morning, Fluttershy!" said Rainbow Dash. "You peed in your sleep. I was there and I heard you."

Fluttershy blushed.

Rainbow untied Fluttershy, and she sat up, in her puddle, feeling her mess squish under her rear.

"How did you like that?" Rainbow asked.

"I loved it," Fluttershy said, blushing lightly. "Thanks for doing that for me."

...

Rainbow Dash farted loudly. "Trust me, there's nothing you could tell me that would weird me out."

"Well... if you're sure... I have a lot of really weird fetishes. It's really embarrassing, but I want to be tied up for an extended period of time in my underwear and have you gag me with your dirty socks. I want to fart a lot, really loud, and have you fart in my face... you love farting so I hope you don't mind... and I also want to... go to the bathroom in my underwear. In both ways. If I want to be really kinky, you'd pee on me through your shorts, and maybe even... if you really don't mind... mess yourself while sitting on my tushie. There, I said it."

"Whoa," said Rainbow.

...

"It was really fun for me too," said Rainbow. "You know I love that sort of thing, and seeing you fart, wet yourself, and soil yourself, and enjoy it, was awesome!"

"I hope you didn't mind peeing and pooping your shorts."

"Of course not! It felt really good." Rainbow let out a sloppy wet fart and sighed of relief.

"Careful you don't soil yourself," Fluttershy said with a smile.

"I already did," said Rainbow.

"Ooh, what a dirty, stinky girl." Fluttershy also let out a sloppy wet fart and pooped her underwear again. "Oopsie." She giggled.

"Now that that's done, you need a bath." Rainbow sniffed Fluttershy. "You really stink."

Fluttershy giggled. She stood up, pulled her skirt on over her soiled underwear, and she and Rainbow climbed into the tub, still in their soiled outfits. As they washed each other's hair and top halves, both girls farted in the tub and giggled. Then they took turns scrubbing each other's butts for several minutes, Rainbow lifting Fluttershy's skirt to wash her panties. They stepped out of the bathtub, dripping wet and mostly clean, although Fluttershy's panties were still slightly stained at the butt and still smelled a little.