I'd stand infront of Hanyuu, acting like I was protecting her. While I put up the strong facade, she would be given an opportunity to piss in safety, albeit right on my legs. Once she finished, I'd walk her backwards slowly, and find my way into a puddle. I'd fake a slip, and land ass-first in the puddle. Falling in the puddle would let me hide Hanyuu's embarrassing moment.
Then, I'd wipe her clean, and cuddle her while she cries in embarrassment.