Well, I allow Juni in the bathroom only when I have time to watch her (usually when I take a bubble bath - not in the mornings), otherwise she's trying to see under the door what's happening there. She meows a lot (all my neighbors know that I am taking a shower) if I make too much noise with the shower, so I have to keep the handle in my hand. But this is not why she is not allowed in the bathroom. Even if she went to her special place just before this, she will do it under the bathtub too.