Despite the challenges associated with motherhood, studies have not consistently identified factors contributing to first-time mothers’ dissatisfaction with motherhood in resource-limited regions. To fill this research gap, this study investigates how adverse childhood experiences (ACEs) result in first-time mothers’ dissatisfaction with motherhood through emotional distress in Nigeria. Results from the partial least square structural equation model suggests that ACEs are associated with dissatisfaction with motherhood ($ \beta $ = 0.092; p < 0.01) and emotional distress ($ \beta $ = 0.367; p < 0.001). There is also a significant association between emotional distress and dissatisfaction with motherhood ($ \beta $ = 0.728; p < 0.001). Indirect path from first-time mothers’ ACEs to dissatisfaction with motherhood through emotional distress shows significance ($ \beta $ = 0.267; 95% CI (0.213, 0.323); p < 0.001). In addition, the indirect path from first-time mothers’ ACEs to dissatisfaction with motherhood through child emotional closeness showed significant dampening effects ($ \beta $ = 0.044; 95% CI (0.025, 0.066); p < 0.001). No serial impact of emotional distress and child emotional closeness was found in the study. The findings based on child gender indicated that only among first-time mothers of female children are ACEs predictors of dissatisfaction with motherhood. Trauma-informed interventions should be introduced in primary care settings to screen for ACEs and emotional dysfunctions among first-time mothers.