What the fuck? That's not OK that you essentially tricked your partner into something you thought she wouldn't consent to!!!! That's disgusting.

Not the pee, the lack of consent. You then LIED to her saying it was an accident but it wasn't.

You should have TALKED to her and gotten her consent. And if she didn't consent then tough luck for you.

I can't believe you thought it was OK to do something like that without consent.