The purpose of this study was to examine the covarying relationship between commitment and sexual satisfaction in committed relationships throughout the course of couple therapy. A sample of 366 heterosexual couples completed questionnaires regarding sexual satisfaction and commitment at each of the first five sessions of couple therapy. Cross-lagged panel analyses revealed that, between the first and second therapy sessions, there was a bidirectional relationship between commitment and sexual satisfaction, with each variable at the first session predicting the other at the second session. In addition, sexual satisfaction at the second session predicted commitment at the third session.