It was early into the night. There was usually nothing for Princess Celestia to do at this time. Not that she ever did much anyway. So, she went for a flight all around Equestria.

She didn't want to attract too much attention, so she wore a skintight black outfit similar to that of Twilight Sparkle and Pinkie Pie in It's About Time. This didn't do much to conceal her mane and tail, but she hoped it would be enough.

She was just flying above Las Pegasus when the urge to pee hit her. She had drank a lot of water before that flight. But, she was sure she could hold it for a while yet, and continued her flight far away from Canterlot.

The pressure in her bladder grew stronger, and soon she really needed to go. So she raced back to Canterlot as fast as she could. She had quite a distance to fly, and she wasn't sure she was going to make it.

Soon, Canterlot came into view. Celestia was in desperate need of a bathroom. She flew as fast as her wings could carry her, her heart racing.

An eagle nearly collided with her. Celestia barely avoided it, and felt a bit of pee make its way out of her, dampening the crotch of her outfit.

She felt like she was about to burst when she reached the secret entrance to her bedroom, which only she knew about. She entered her bedroom, and was halfway to the bathroom when she froze. Celestia began peeing. The warm wetness soaked the back legs of her skintight outfit and a puddle grew rapidly on the floor. She sighed in immense relief. The release felt so good, just as it did every time she did this.

Every once and a while Celestia would drink a lot, fly around Equestria unseen, and race back as soon as she had to pee badly. This was the farthest she'd gotten, aside from the times she had actually made it to the bathroom, but whenever she did she would just pee herself in the bathroom anyway, because she enjoyed it too much not to. Of course, no one else ever knew.

Celestia finished peeing. She was standing in a big puddle, and her skintight outfit was soaked from her rump down. After she finished cleaning up the puddle, she pulled off her outfit and hopped in the shower.

Author's Notes:

I bet a lot of people into this would have liked to see this with her, and it plays with the only other "put herself in that situation" scenario I could think of. I tried to put a little more detail in there, but I'm still not too good at that. Or maybe too shy about my fetish to do more. Also this is probably the last chapter/story I'll do, I don't want to write too much.