A stupid story. What a poor man. When she said that she would sleep with her coworker and sent him naked pictures of herself, he should made a short prosess, filed for divorce and went on with his life. She wanted a man other than her husband and proved that she was not fit for marriage. Thank her for revealing it before you get children. Easy comes, easy goes.
Well it depends , if the revenge enables a positive change in the target of revenge in the future there may be less wronged and for some revenge also can give some closure on both sides . The revenge is bad ideology is only there for public order , to a more stable governance . If you check it high up in the powers revenge is commonplace and "good".