Author's Notes:

Another requested chapter.

This one contains nudity, but it doesn't describe anything explicitly. At least not at the front.

Twilight Sparkle and Sunset Shimmer sat on Twilight's bed. Their pajama pants were wet and full of a smelly mess.

"Sunset," said Twilight, "have you ever thought of the possibility of alternate realities?"

"Like this world and Equestria?" said Sunset.

"No, like some sort of parallel universe that has a different version of both worlds, with the same people but different stuff goes on? Like, a multiverse?"

"I never really thought about that, but I suppose it could be possible."

"I've been researching it, and I haven't found any real information yet. But I believe there are alternate realities out there..."

...

In one such alternate reality, Twilight had not done her dare with Spike. She had, however, gotten constipated. She was so blocked up by the time she had taken laxatives, that she didn't want to have to rush to a toilet when the urge hit. So, she wasn't wearing any pants, skirt, shorts, or even panties, so she wouldn't have to worry about messing herself. Of course, there was still the issue of making a mess.

"Go for it," said Spike.

"Are you sure?" said Twilight.

"It's really easy for me."

She was a little nervous about it, but decided it would be preferable, and needed Spike's encouragement. She was unashamed of Spike seeing her naked lower half, she'd undressed in front of him before, although she did prefer him to be looking at her from behind.

She was making dinner in the kitchen when she finally felt what she hadn't for days. The pressure was intense, and although she was sure she probably would have made it to the bathroom, she squatted down where she was and felt a few logs make their way out of her butt and onto the floor.

Despite the smell, she felt very relieved when it was done. Although, she was sure this wasn't all of it. But, taking a dump like this wasn't so hard. She could get used to it.

She levitated her mess into a garbage bag that she'd take out immediately once this was over.

8 minutes later, she was eating dinner, when she felt the pressure again. So, she quickly stepped to the side of her chair, squatted down, and pushed out another load similar to the last.

After cleaning it up and finishing her supper, she stood up, and Spike stood in front of her.

"I have to go now," said Spike.

Twilight opened the door to the backyard, when she suddenly felt another urge.

"Mind if I join you?" said Twilight.

"Sure," said Spike.

Twilight and Spike squatted down in the middle of the yard together, and released a few logs of poop each onto the grass.

Twilight went to her bedroom and started reading a scientific book, but then the next urge came. She jumped out of bed and made another mess on the carpet of her bedroom. She decided to clean it up later, got back onto her bed, and read the book.

Only a minute later she needed to go again. Feeling a little more daring, Twilight positioned herself above the bed and let another smelly brown mess ooze out of her rear and onto the bed sheets. She blushed a little at this, but cleaned it up. She almost changed the sheets, but decided to leave it until tomorrow. She didn't know why.

She sat on the couch and watched one of her favorite sci-fi movies. Approximately every five minutes she'd feel an urge hit, so she'd take a dump on the floor, or on the couch, though leaving room on the couch for her without sitting in her mess.

This only happened five times, at the end of which she felt immensely relieved, and, after twenty minutes, she didn't feel any more urges. So, she paused the movie, cleaned up the messes, and put a white pair of panties and her dark blue pajama pants on, and then resumed her movie.

She hadn't cleaned off the spot on the couch, but she had a powerful cleaner and stain remover she knew could get the job done. For now she'd just relax, and she'd take care of the rest tomorrow.

Five minutes in, she felt one more urge. Rather than pull her pants down or rush to the bathroom, Twilight was curious on how it would feel to soil herself. At the moment it seemed more convenient than the other two options.

So, she just relaxed and let it all out into her panties, causing a brown spot to appear on the butt of her pajama pants. She had to admit, she really liked the feeling. The convenience, the warmth it provided her butt, even if it smelled bad.

"Did you just poop yourself?" said Spike.

Twilight blushed lightly. "I think it's kind of fun."

She stayed in her soiled pajama pants for the rest of the movie. About 20 minutes before the end of the movie, she felt one last urge, and without a second thought she let the last few logs come out into her pants, sighing of relief.

This was the last of it, but she knew this wouldn't be the last time she'd mess herself.

After dumping the poop into the toilet and flushing it, Twilight went to bed without changing out of her dirty pajamas.

When she woke up the next morning she needed to poop again. And she didn't feel like getting up yet...