So according to my research a dead zombie is a dead undead and cannot be returned to regular life with a Raise dead or Resurrection spell. However, you can restore a zombie to undeath by using Revivify on it. But to restore it to its old alive self you need True Resurrection.
Basically Mayrina is screwed. Best of the bad options is to tell her to go bury her husband or drag his body to Baldur's Gate.
