I'm glad you read "a book" but you need to read *that* book. it is called "Not Just Friends" by Dr Shirley Glass. you might even find it in the library, and if not you can get it from a bookstore. it is specifically about affairs, especially in the workplace, and about how sometimes they "just happen" but the situation can be fixed later. she talks about what can cause affairs (not really anyone's fault, except in this case the fault of the coworker who took advantage of your husband) and what you and your husband can each do afterwards to not only *fix* things but also to prevent anything similar from happening in the future, and how to help yourself stop thinking about it. now all this repair is a lot of work and takes time but it is worth it. you and your husband can put this behind you and have an even better marriage than you did before. read "Not Just Friends" and then you will see what I mean.