The only dealing I ever had with a Living Trust was working with Mortgage Loans. A person puts their real property in someone else's name but retains the right to live in/on the property until their death and then it belongs to the person named in the trust.
You may have a chance if she was not in her right mind and maybe the Dr's and nurses witnessed it all. That said I am not an attorney. Find you a good one.
Holly - Shine On You Crazy Diamond - Pink Floyd
9/3/09 Stanford - Dr Dake - Stent in R-J to unblock Arachnoid Cyst in Sigmoid Sinus. Stent in narrowed L-J. Balloon in narrowing where R & L Jugulars meet.