f you’ve ever been a betrayed spouse, then you may have, at some point, considered revenge for the affair. Even if it’s just a daydream about what you’d like to have happen to the other man or woman your spouse has been cheating with, fantasies of revenge are really common.
In my opinion, these are nothing to worry about and you shouldn’t feel guilty. Just because you fantasize about something awful happening to them, that doesn’t mean you really want it to. It’s more likely just a way for you to process your emotions.
Some betrayed spouses do things that may seem vengeful, but oftentimes, they are simply trying to protect themselves from further hurt. Some tell the other man or woman’s family about the affair ( and if they are also married, they may tell their spouses). If it’s a workplace affair, they may tell the employer. Some feel a need to tell everyone what happened, and some may go as far as to leave a scathing remark about the affair on the other man or woman’s Facebook wall.
To me, these are all okay, and while they may not have the desired effect, they are nothing to feel bad about.
It’s when revenge goes too far that there is a problem.
such behvaior could mean:
stalking behvaior
physical assault
slander
These will harm you more than they ever will the other man or woman. If you feel that you are leaning in that direction in more than just daydreams,then seek professional help from a counselor, etc.
Perhaps the best revenge is  to make your marriage, and the rest of your life, a great one