I didn't even address the mediation issue, caue I don't think it's an issue. Obviously, you do. Betsey, I just don't think he would be calling, and friendly if that were the case.
Please try to look at this as his attempt to solve two needs. 1) a place for the girls when he has them 2) a roof over his head.
{{{{ Hugs, sweetie}}}}
When you can't make a decision because you are torn between your heart and your head, listen to the half with the brain.