Mothers with a history of institutional care in adolescence are often involved in high-conflict partner relationships, which may undermine relationships with children and confidence in oneself as a parent. Not all mothers think of themselves as bad parents under these circumstances. We turned to psychological resources as an explanation, focusing on mothers’ trait self-control. The negative association between family conflict and parenting self-efficacy was tested for moderation by self-control among 104 mothers with a history of institutionalization for behavioral problems and delinquency during adolescence. We found a negative association between current family conflict and parenting self-efficacy among mothers with low self-control, and no significant association among mothers with high self-control. This study draws attention to the needs of high-risk mothers in their parenting role and demonstrates that self-control is a potential resource for mothers to balance the load presented by conflict in their families. The findings suggest new avenues for intervention.