Do Your Spouses Indiscretions Give You License

My wife and are both active members, and I understand that certain actions may violate the LOC. However, when I find out about my wife's sexual indiscretions, it makes me angry and part of me wants to do the same thing. It feels like that would make us equal, instead of one of us keeping our commitment to each other while the other doesn't (Not adherence to the LOC, I understand the blessings associated with that). Has anyone else struggled with this feeling? How did you deal with it?