He already knows your boundaries.
All you can do is ask him his plan, and if he has none, then ask him how soon he can get out of the house. Then in the morning get to several Attorneys and interview each one during the 'pro bono' time they give a prospective new client and ask some questions about your situation, how do you get him out of the house, how do you get him to pay child support, etc I do not know if Florida has a legal separation agreement or not, or if you can set one up or not, or just go straight for the divorce. I would suspect however, to protect you and the children that you would be better off with some 'orders' from the court pertaining to 'supervised visistation' and child support.
J M H O
When you have that discussion this evening, just remember we are there with you in spirit.
Love and hugs,