My father died 3 weeks ago, and my siblings and I are trustees of his will. My mother died 11 years ago. My sister claims that my dead parents told her that my parents gave me a personal loan 23 years ago when I purchased my home and never paid it back. And that this loan should now be treated as my part of the estate distribution. There never was a loan, they don't know how much the loan amount was, and there is no paperwork. What should I do?