What boundaries/consequences are you setting for your XH not meeting your needs? You are in a "power" position at this point. He wanted to come back....why? I believe you need to make a condition of his staying a boundary. That boundary being that he needs to do xyz. Give him specifics you need of him to meet your needs.
Right now as someone else mentioned....he is walking all over you. You are allowing him to stay, and allowing him to stay without meeting your needs. You have a backbone hon, use it. It's not easy when it comes to a one-on-one relationship I know. I don't know what type of an attorney you are, but sometimes it's much easier to get up in public and argue for someone else than it is to do it for yourself with someone you care for, but it's necessary.
He came home for a reason (or reasons), what were those?
