As Rarity walked home that day, she found herself often needing to squeeze her thighs together and chew her lip worriedly. Public restrooms were often filthy, and so she never used them. But, that was coming back to bite her today. What made it worse was that she wasn't walking home alone, now that Twilight had reunited the group of friends, Applejack had made the offer of accompanying Rarity. Not wanting to jeopardize her freshly-mended friendship, the purple haired girl agreed.

But now she just wished that she was alone so that she could cross her legs and bounce like she needed to without earning any unwanted attention from AJ. It simply wouldn't do for a lady to be caught doing a “potty-dance” like a little girl. Even still, she couldn't help but shift her weight every couple steps, almost doubled over. But she was sure Applejack hadn't caught on.

She was wrong. Applejack was well aware. How could she not be? Rarity was twisted up like a poorly constructed pretzel. She was constantly jumping from one place to the next, wincing. She didn't quite know if she should say anything, though. Rarity was probably pretty self-conscious about that kind of thing.

“Y'alright?” Applejack tried.

“Quite f-fine...” Rarity groaned and shook as she took tiny, mincing contorted steps.

“We're almost to your house,” Applejack assured. “We should be there soon.”

“Why sh-should I be concerned?” Rarity asked, her face burning in embarrassment.

“Y' look a little rushed is all.”

“Well I'm fine,” Rarity repeated, more to herself than to Applejack. But she knew she wasn't fine. She hadn't been fine for hours. Suddenly she stopped, doubling over, clutching herself with both hands. The scrunched position caused her belt to press into her bladder hard and she winced loudly.

“Y' sure about that?” Applejack quirked an eyebrow. “Y'know, if ya gotta take a leak, that's fine. We can stop somewhere.”

“No,” Rarity insisted. “I don't-- I can wait.”

“Suit yourself,” Applejack shrugged. If that stubborn girl wanted to humiliate herself, she wasn't gonna stop her. In fact, the idea of continuing to watch the show Rarity was putting on was actually... a pleasant one. As they continued their trek, Applejack found that she had a hard time keeping her eyes off her desperate friend. Heat rose up inside of her stomach as her growing fascination took hold.

Rarity stopped short and moaned. Applejack considered pressing the issue again, but she realized, her heart beating frantically, that she wanted this to go on for as long as it possibly could. She didn't want her friend to be in agony or miserable. But her body came alive seeing the normally composed Rarity so desperate and needy, and Applejack just couldn't bring herself to let it conclude.

“So, you lookin' forward to the dance?” Applejack asked, her voice carefully casual.

“Oh yes,” Rarity nodded. “I've got a nice dress picked out and everyth-” she was cut off by her bladder squeezing a short spurt of urine into her panties. She yelped out loud, her face burned a deep red, she tensed up completely. She hopped back and forth to cut off the stream. It was the first flow of the dam breaking apart. The leak soaked her underwear and started making its way down her legs. 'No!' She though, terrified and breaking out in a cold sweat. 'No! No! Please! Not yet--!' She noticed Applejack staring at her. The cowgirl's eyes were wide and her lips were parted.

Once she felt that she had gotten herself under control once more, Rarity continued walking. But she knew she couldn't last much longer. The heavy weight in her abdomen was splitting open, the flood aching and screaming to rush out. Every step sent a new wave of urgent need throughout her bladder. Finally, she just couldn't walk anymore. She couldn't wait anymore. The amount of fluid contained inside of her was far beyond her ability to hold in she needed to get home to her bathroom or she'd drench herself, but she couldn't move. “A-Applejack!” she wailed. “I can't-- I'm going to--! I can't wait!”

“It's okay, Rares,” Applejack tried to sound comforting. She looked around, knowing that there was only so far she could take this game of hers. If Rarity completely wet herself, she'd be devastated, and AJ just couldn't let that happen to her friend. Unfortunately, they had walked into a residential area, and Applejack knew Rarity would never knock on someone's door to beg to use their bathroom. But up ahead, AJ saw it. A small clearing in between the houses. A small, grass-filled field. “C'mon. I've got an idea.”

Rarity was walking, but she was whimpering the whole time, especially when Applejack led her down another path, away from her home. “Where are you going?” She writhed desperately against the pain as the reached the field.

“You can go,” Applejack said. “Go behind a bush. It's just us. It's okay.”

Rarity gasped and tried to straighten herself out. “But-”

“And don't worry, I won't tell anyone.”

“Y-You promise?” She stumbled, legs still tangled together as she doubled over, twisting her hips.

“'Course. I'd never do that.”

They were alone. When Rarity looked around they were concealed under the cover of trees. She let out a loud moan as her splitting bladder began to squeeze again. “F-fine, I'll go.” She quickly pulled down her underwear and squatted. Instantly the flood began to spray out of her.

Applejack watched in numb amazement as Rarity finally let go. The sound of her urine hitting the ground was audible, as were her sighs of euphoria. She peed for so long that it impressed Applejack, releasing tiny moans of distress as well as relief. She'd stop fighting her bladder, but her whole body was still tensed up. When the stream finally ended and she'd pulled her underpants back up, she looked up at Applejack, tears in her eyes. “Please don't tell anyone...”

“I already told you I wouldn't,” Applejack reminded. “And I always keep my promises.”