She was with her fiancee, who is now her ex fiancee and snuck away and banged this dude she is with now. My wife, who fires from the hip and can often times be as gentle as a sledgehammer has asked her if she will be able to keep her legs shut.....
The pictures are her past, there is no changing that.
Her actions are her present, she needs to change that if she wants her marriage to succeed and your wife was telling her that in her own way, lol. Your wife was right.
If someone is to truly love this woman they are going to have accept her past and love her for who she is but she is going to have to change and that kind of change comes from within and doesn't happen overnight.