This study of 125 mothers examined the role of rumination in maternal emotional and behavioral outcomes subsequent to discovery of the sexual abuse of their children. Abuse severity, a maternal history of child abuse experiences, and life hassles were examined as predictors of negative outcomes. The central finding was that these factors, many of which are not controllable, were less likely to predict poor maternal outcomes than was rumination, a cognitive process that may be alterable. Rumination was the strongest correlate with each outcome. Further, the effects of most predictors on outcomes in this study were mediated by a ruminative cognitive style. Abuse severity, income, ethnicity, and education lacked significant relationships with maternal outcomes. This study asserts that rumination is a central component for understanding maternal outcomes in the post-discovery phase of sexual abuse cases. It recommends that rumination be routinely assessed both for research and treatment purposes. (Contains 5 tables.)