ABSTRACT
Infidelity is a leading presenting problem in relationship therapy, yet it is notoriously difficult to treat effectively. Discovery or disclosure of infidelity precipitates a crisis for the couple because previously held beliefs about fidelity, trust, and love are destabilized. Typically, the couple begins treatment in a state of shock, disbelief, anger, and denial, accompanied by feelings of skepticism and pessimism as the partners question if the relationship is irreparably damaged. The course of treatment is often protracted and characterized by periods of instability.
