Good question. Typically when there are several tenants in common as to the ownership of a home, all have the right to live in it and one cannot keep another one from residing in it. However, we have a dissolution decree in your situation.To answer your question you need to carefully read the terms of the dissolution decree as to the home you have an interest in. If your former spouse has physical possession of the home per the decree, he would be allowed to have whomever he desires residing in the home with him.