Dower rights in Ohio

ok, this is a long question, my grandfather who passed over a year ago willed his home to my father and my aunt. my aunt has already quit claimed her half interest to me and my father wants to do the same because he does not have the credit to refinance the house which has a mortgage against it that is still in my grandfathers name. however, my father has an estranged wife whom we haven't seen in over 3 years, so is there away around her signing away her dower rights on the quit claim?? and if my father is unable to acquire refinancing for the mortgage that is still in my grandfather's name can the bank call the loan and potentially remove his name from the deed??