He asked about that this morning. To ban her, we would have to give all visitors a secret code and restrict entry to his room. He decided not to do it at that time but is thinking of doing it now.

It seems like a nuclear option. As awful as what she is doing is, it seems like the psychodrama fall out would be worse for his healing than letting her visit for 30 minutes a day or something. The issue with that is if she can't respect the boundary to not come at all, there's little chance she will respect the boundary to limit her visits.