As the tittle says, the husband found that his wife cheats on him with her coworkers (almost sure that they had some kind of party/company travel hotel where she would get drunk and cheat). She also had a problem with drinking a lot and I think she really treated her husband and kid (I think it was a daughter?) very bad for a long time before. The story alternates for both the wife and husband pov's, she realizes how bad she fucked up and tries to save her marriage. Husband struggles between grieving and rage. Can't remember if they got back together or not.
Thank you all in advance!