needing to pee

First off, we live in a very small house. I had to pee really bad, so I went into the bathroom, and my mom was painting her toe nails on the toilet...not using it, just sitting on it. I told her I had to pee and she wouldn't move and started yelling at me for saying that I had to pee...like WHERE THE FUCK ELSE AM I SUPPOSED TO PEE?! It's a toilet...Anyway, she yelled at me so much that I started to cry. I don't understand why she was being so mean.