Properly signed and notarized Quitclaim Deeds are generally unaffected by death.As such, the Deed is still valid.
Usually, the estate would file the Deed making the property part of the probate estate.
If this occurs, the Probate Court would distribute the property pursuant to state laws of decent and distribution, since the decedent does not have a Last Will and Testament.
Typically, persons divorced from a decedent are not in line under a court-managed distribution of assets through the Probate Court.