Mama called a few minutes ago. She was really upset. Ria has bitten her twice today. Her nerves were already frayed because she had an MRI scan done today and she didn't deal very well with being in the box. I keep telling her to knock the shit out of Ria, but she won't. So Ria gets away with it every time. I can't get Mama to understand that Ria won't stop it until she's made to understand consequences. I don't know why, but Ria has always bitten us, but she's a lot more wary of biting Mara and I because she knows that we'll get her when she does.