Today was a [adjective] day

Day UTI in Equestria. Your eyes snap open from a combination of having to piss more than you ever needed to in your life, and of the familiar feeling of something crawling under your blankets. You rip them back to reveal Fluttershy admiring your pee-boner.

"Oh my, it looks like you're all ready!" she says tugging on your boxers. You spring up and grab her, pinning her to the bed beneath you.

"A-Anon!" she says, blushing red. You line yourself up to her. You push your penis against her urethra.

"Wait, Anon, that's not-"

She's cut off as you piss inside her. From the look on her face, it must feel weird to have urine shoot back up your peehole and into your bladder. As you piss and piss, you see her stomach distend. She lets out a shriek as her bladder ruptures.

"What's wrong, Fluttershy? Peritonitis isn't your fetish?"

You finally finish and pull away, leaving your urine and her blood flowing from her. You pick her up and toss her out your window before going back to bed.

Today was a good day.