No, they really don't get it. From the outside, the narcissist often looks to be the perfect husband, with the slight insinuation that you, the wife, are the problem. It looks even more to be the truth when he quickly remarries a wonderful woman. What can I say, narcissists have good taste! But it's unlikely that the narcissist will make more than a token effort to try to treat wife number two any better. People who aren't capable of caring about others are pretty terrible at relationships.