We had about a 3 week period between when our other house sold and we had to be out of it and our new house was finished. Because of the short amount of time we didn't want to rent and apartment so we stayed with my inkaws for those three weeks. Well they only have a shower in the bathroom in their bedroom so that would have to use it every morning before I went to work. I tried to be as quiet as possible so that I wouldn't wake them up.
One morning I went into their bathroom, quietly, to take a shower. After I'd stripped down I realized I needed to use the toilet, number two, I hadn't yet turned the shower on, so I sat down on the toilet to get it done. My MIL must not have known I was there, like I said I tried to be quiet and not disturb them, and got up to use the bathroom herself. She walked in, there is no lock on the door, and there is was, fully nude, sitting on the toilet, letting it rip.
It was awkward. We've never mentioned it to each other. Something's are better left unsaid.