Arizona  |  Wills and Trusts

My father passed away he and my mother were still married .My question is my dad refinanced the home some years ago but for some reason my mothers name was not on the deed for the house like previous to refinance .My parents never seperated nor divorced . The home is paid off and now and she wants to put the home in her name and doesnt understand why her name wasn't still on the home in the first place. All bank accounts , Autos and social security transfered to her after time of death. What does she need to do now?