I think no matter what the type of marriage (second, third, etc.) if the person that was married previously didn't learn from their OWN mistakes in the last relationship, the current one is doomed to fail. I mean, even if the person was cheated on by their spouse and treated like dirt, there are still things from that relationship they need to improve and change in order to function well in the next. My DH is on his second and that scenario occurred with his first (crazy BB!) - but he has told me all the things he learned from that relationship that were of his own doing. He blames her for her actions but also realizes his own shortcomings and vowed not to do the same things when he got into a new relationship.