"「Even if it’s impossible do it anyway. It’s too early to give up before you try. If you don’t I’ll spank your butt.」
I said and gave her a nice smack.
It let out a good smacking sound."
I'm actually kind of glad she didn't pee in this one. I couldn't imagine a girl having just peed a sizable puddle having more in her.
I wonder why masochistic magic hasn't been used more often. Last time I've seen something similar was Okayado's Deadline Summoner, and that was a while ago.