My father-in-law passed away w/o a will. The case is in probate now and my wife and her sister are the only heirs. Her sister is the probate administrator. Both us and her sister agree to sell the only house. We would like to use a realtor that we know but her sister wants to use a realtor that she knows. We have negotiated many times but can't come to a mutual agreement. What should we do? Can her sister bring this to court and since she is the administrator, will the court grant her the right to choose a realtor?