The specific aims of this study are to: (1) To examine patient pain, spouse response to patient pain, and patient behaviors in response to pain over the course of 6 months in couples facing metastatic breast cancer, (2) test the biopsychosocial model of chronic pain in breast cancer; expanding it to include the influence of patient psychological functioning, spouse psychological functioning, and relationship functioning, on patient pain, spouse behaviors, and patient behaviors in response to pain, (3) use ecological momentary assessment to characterize patient pain, spouse response to patient pain, and patient behaviors in response to pain.