For some reason, I'm ok with this haha. You're already wet as hell, you're on your way home, right? I would have done the same thing, instead of finding a Starbucks or anything. If I wasn't heading home, then no I wouldn't have done it.
Peeing in the shower is ok, people aren't supposed to pee in the pool. Definitely would never invite you over to swim. I am starting to see a trend here.