Few therapists test their assumptions about how they do therapy against what they actually do. The purpose of this study was to test how well integration is practiced within the proposed theoretical framework of one therapist. Qualitative and quantitative data were designed to answer four research questions: fidelity to the integrated model, client change, how working with the integrated model influenced ongoing sessions or cases, and change in the integrated model through the course of the study. Three couples were used as the sample; 17 sessions were coded and analyzed to answer the research questions. Results indicate that the therapist maintained fidelity to the integrated model that resulted in positive change for each couple. Using the integrated model was found to influence ongoing sessions and cases in a number of ways that also resulted in changes of the integrated model. Other findings, limitations, and clinical implications are discussed.