Well the past can't be changed, but if your wife lives a good life and strives to make a difference in this world using all that her mother taught her, I'm guessing that would be good enough for Mom. I'm a parent and that's what I think is more important whether my son has the chance to say goodbye, or not. Let go of the guilt. It's good for nothing. I'm sure your beautiful bride's mother would want her to continue on in life guilt free.My wife still has a lot greiving issues, she didn't get to say good by before her mother passed and she feels guilty for not doing so. I think that is the hardest thing for her to deal with.