Our study examined how two sexual minority stressors (internalized homophobia and social constraints in talking with others about one’s minority sexual identity) are related to psychological aggression (PA) in lesbian women’s relationships. PA includes a range of methods to hurt, coerce, control, and intimidate intimate partners. Rumination (i.e., brooding about one’s self and life situation) and relationship satisfaction were examined as potential mediating variables. Self-identified lesbian women in a same-sex relationship (N = 220) were recruited from a market research firm’s online panel. Participants completed measures of internalized homophobia, social constraints, rumination, relationship satisfaction, and frequency of past year PA victimization and perpetration. Internalized homophobia and social constraints in talking to friends about sexual identity yielded a positive indirect link with PA via a sequential path through rumination and relationship satisfaction. There was an additional indirect positive association of minority stressors with PA via a unique path through rumination. These results demonstrate the importance of continued efforts toward reducing minority stress, where possible, as well as enhancing coping. Given the importance of rumination and relationship satisfaction in the link between minority stressors and PA, it is imperative to improve adaptive coping responses to sexual minority stressors. Development and validation of individual- and couples-based interventions that address coping with sexual minority stressors using methods that decrease rumination and brooding and increase relationship satisfaction are certainly warranted.