In this interview, Gerald Weeks shares his expertise on the topic of infidelity and couples counseling. Dr. Weeks defines infidelity, presents assessment strategies for treating the issue of infidelity, and discusses an intersystemic model for infidelity treatment when counseling couples. Dr. Weeks also provides insight into common mistakes made by clinicians when counseling couples in treatment for infidelity. He is the author of 22 books and hundreds of journal articles and a leader in the field of marriage and family therapy and a highly respected educator and clinician.