Is it ok for me to hate my cousin for what shes done? even though her mother thinks shes in the right!!?

I would stay out of any verbal argument over it or anything, to avoid family confrontation, but she is in the wrong, its not easy to ba an army wife, it take a lot of dedication, but that is no reason at all to act the way she did. Also, he let her get away with all this, he needs to learn to put his foot down and do right by himself as well as his wife, a marriage needs to be an equality, not one walking all over the other. There are not enough men like him in the world these days, maybe now he can find someone worth his time. I wouldnt even acknowledge her, you are better than that, she will get whats comin, karma's a *****!