Suggestions

Does anyone have any suggestions as to how to handle it when your 95% potty trained 3 year-old walks into her little brother's room fully naked, slightly bends over and pees all over his carpet while you are standing there?  The first 7 things that came to mind were absolutely no good. 4 of them were going to get Child Services called on me, 2 of them were going to get the police called, and the last one was going to make me have a hard answer for the Man upstairs. So, instead of any of those options, she ended up going to bed by herself with no lullabies. For her, this might have been worse than most of the things on my list.