My husband wants me to sign over 20% of my home. If not, he threatens to take half in a divorce. What should I do?

Dear Quentin,

I live in Florida. I think my husband wants a divorce. I purchased my house a short while before we got married about six years ago. The deed and the mortgage are in my name only (actually, I haven’t even changed it to my new last name). 

I have about $80,000 to $100,000 worth of equity. Everyone keeps telling me he could force me to sell the house and give him half of the proceeds. He says he wants me to sign a contract where he would get 20%. I don’t want to sell, and I don’t want to…