I truly hope your meeting tonight goes the way you want...and yet, try to remember that you do not control the outcome.
I would really consult a lawyer or three, and get some geographically relevant legal advice. Getting information doesn't commit you to any particular course of action, but at least you'll know what options you have with regards to custody and use of the house.
No worries...we're all here reading your post, cheering you on, and, if you don't mind, praying for you.
