Hi Lara,
I split your post from the topic that you originally posted on so that you will get more attention to your question
I haven't been in your position, but if I were, I think I would talk to her during the day about sleeping at night and not messing around so to speak. Then at night, respond as minimally as possible by not talking back or looking her in the eye or otherwise engaging her.
Hopefully someone else can come around who knows more about what they're talking about though