That same day, Rarity was laying on the beach with Fluttershy. Both were wearing their regular dresses.

"So what's Pinkie doing today?" said Fluttershy.

"Planning a party for this evening," said Rarity. "She said you're welcome to attend if you want."

"Ooh, Rarity, it's an honor."

"Make sure you tell Sunset. I'm sure she'd love-"

Rarity was interrupted by a gurgling in her stomach, but ignored it.

"Are you all right Rarity?" said Fluttershy.

"Yes, I'm fine. Now, I've been meaning to get a new swimsuit that's simply-"

FFFFFFRRRRRRRRRRRRRRT!

Rarity blushed at the sound of this loud, wet fart.

"Oh my... I'm terribly sorry, Fluttershy."

"It's all right."

Rarity farted again, wetter than before. "I'll be right back, darling." She stood up and ran toward the portable toilet, farting a few times along the way. As she got close, she could feel that she was about to do more than just fart soon.

When she reached the porta potty, she tried to open the door, but it wouldn't move. It was locked.

She knocked on the door. "Whoever's inside, please hurry it up! I have to go!"

There was no response.

Rarity knocked on the door harder. "HURRY UP! I REALLY NEED TO GO!"

A wet fart made its way out of her, and she could feel her poop get close to coming out. She held her stomach with one hand and banged on the door harder with the other, but there was still no response.

Rarity kept banging on the door, even body slamming it a few times, barely able to hold it in. She looked around to make sure no one could see what she was doing. No one could see her, not even Fluttershy.

She knocked on the door one more time, and then a small paper came out from the door. It said "Out of order."

"What?" Rarity fumed. "How could someone put the small warming paper inside the door if the toilet's broken?"

After another wet fart, she considered her options. She didn't want to use the bush again, because it was really annoying. But her only alternative at this point was to soil her panties. There was nothing else she could do. She ran to the bush, getting closer to messing herself each second.

As soon as she reached the bush, she released a loud, boisterous fart.

BBBBBBRRRRRRRRRRT!

She blushed, but fortunately no one was around to hear it.

Once she was behind the bush, she started to dig a hole in the sand. It took all her effort to keep holding it in. Once the hole was deep enough, she pulled down her panties, hiked up her skirt, positioned her butt above the hole, and let go.

Hyperscat burst out of her and into the hole. She sighed in relief, which turned to concern as it didn't stop.

She pooped for five minutes before she was done. She felt so relieved, and the hole was overflowing. As she pulled her panties back up, she noticed a small brown stain on them. And she knew they'd only get dirtier once she pulled them up.

She was about to go back to Fluttershy when she realized she forgot to bury her poop. As she threw the dirt back over it, she felt like vomiting because of the smell. But soon her mess was buried under the dirt, and she returned to Fluttershy, hoping she wouldn't notice the state her panties were in.