Previous literature suggests a tenuous link between fathers’ care of children and maternal employment and earnings. This study shows that the link is stronger when measures of caregiving capture fathers’ increased responsibility for children. The analysis of time diary data from 6,572 married fathers and 7,376 married mothers with children under age 13 indicates that fathers (1) engage in more “solo” care of children when their wives are employed, (2) are more likely to do the kind of child care associated with responsibility for their children when their wives spend more time in the labor market, and (3) participate more in routine care when their wives contribute a greater share of the couple’s earnings. In addition, the “father care” to “mother care” ratio rises when mothers contribute a greater share of household earnings.