can a will be changed by the husband after wife pass

Is the Will the husband's Will, or the wife's Will, or a joint Will? That matters. If it's the wife's Will, no one can change it. If it's the husband's Will, and he's still living, he can change it, assuming that he has the required level of mental capacity (which is fairly low). If it was a joint Will, then wife's part cannot be changed, but unless there is a separate, written, signed, contract between the husband and the wife in which the husband promised not to change his part, then he can change his part. At any rate, the original Will should have been filed with the probate court of the county where the wife had her principal residence fairly soon after she died, even if it wasn't going to be probated. This is required by Georgia law. It is not too late for someone to do that. Send the original Will and a certified copy of the wife's death certificate to the probate court and tell them the filing is for informational purposes only.