A 52-year-old woman presents with a major depressive episode that began approximately three months after her youngest child left for college. She reports persistent sadness, loss of purpose, difficulty sleeping, and withdrawal from social activities. She states, 'My whole identity was being a mother. I don't know who I am anymore.' Her PMHNP initiates interpersonal therapy (IPT) and identifies the relevant problem area. During the middle phase of treatment, the therapist helps the patient mourn the loss of her active parenting role, explore what aspects of the old role she values most, and identify opportunities to develop new activities and relationships. Which IPT problem area is being addressed?