Due to the growing prevalence and potential negative effects of marital infidelity, it is important for both clinicians and researchers to understand its occurrence. This study focused on examining the process an individual goes through when making the decision to have an affair. Semi-structured interviews were audio taped, transcribed, and analyzed using the transcendental phenomenological model (Moustakas, 1994). The women reported developing relationships outside of their marriage, having support from family/friends for the extramarital relationship, and receiving positive attention from their affair partner. Clinical and research implications are discussed as well as the limitations of the current study.