Yep, that's the one I was thinking of. It's the only time I can specifically recall urine coming up. I THINK you get another option with her much later, at the raider camp if you have fun with her sister and she joins you after. When her sister is on the table, having a victory bang with you, and she bursts in thinking her sister is being attacked. I think in that scene you get another option to do it. Can't recall exactly since that's not my kink, so I avoid it. But I vaguely recall it being an option if you put her on her knees or something.