The association of kin social support with mothers' adjustment and family relations was assessed among 204 African American mothers and adolescents who were on average 14.45 years of age. Also examined was the association of mothers' adjustment with family relations and adolescents' adjustment. Findings revealed that kin social and emotional support was positively associated with mothers' optimism. Poor relations with kin were positively associated with mothers' depression. Kin advice and counseling and kin social and emotional support were positively linked to family routine. Poor relations with kin were positively associated with parent/adolescent communication problems. Mothers' optimism was positively associated with family routine and mediated the association of kin social and emotional support with family routine. Parent/adolescent communication problems were positively associated with adolescents' depression. The findings were discussed in light of their support for theoretical and empirical work on family processes among poor African American families.