Divorce, Selling House, Equity Questions

Ok heres the situation.

When I built my house in 2005 it was in my name only and we got married about 6 months after I moved in by myself. Two years later or so the house was refinainced and my wife was put on the deed. Now she is gone and I've been paying my "our" house note solo since November. I just put it on the market to be sold and my question is when it sells, what portion and I obligated to give her or does she just get half no matter what? Thanks