There is a new TV show called “Unfaithful”. The series premier is here http://www.oprah.com/own-unfaithful/Unfaithful-Stories-of-Betrayal-Series-Premiere. There are also many clips from other episodes at the same site. The premise of the show is that an actual couple talks about the background of the betrayal while actors act it out. The couple then discusses how they recovered. A professional therapist also makes comments about the situation.
I found the stories to be very realistic as to the depth of pain and the amount of work it takes to recover from affair. The stories also offer a lot of hope for recovering from affairs. One common theme was that before an affair happened there was an emotional disconnect in the marriage. Another common theme was that forgiveness is a major piece of the recovery.