This study examined independent and interactive relations between the interparental relationship and maternal employment in predicting fathering within low-income, Mexican American two-parent families (N = 115). Interparental conflict was negatively related to quality fathering, and these relations were noted only for single-earner families. The parenting alliance was positively related to quality fathering irrespective of maternal employment. Fathering was associated with lower levels of child depression and conduct problems. Results suggest that bolstering quality fathering is a useful avenue for improving child well-being and that strengthening the interparental relationship can support quality fathering and child mental health within Mexican American families.