Prior studies find significant inequalities in time spent by men and women in heterosexual households on child-related tasks even when both work full time. We develop a theoretical model and field experiment to study if this inequality comes from external demands from decision-makers which we call the motherhood effect. We send emails to school principals from a two-parent household asking for a call back about an inquiry. We provide a unique phone number for each parent and track who is contacted first. We randomly vary the informational signals about which parent has more availability. This allows us to investigate whether the motherhood effect can be mitigated by household signaling. Furthermore, we explore if effects vary by gender of the principal. We can then compare household based versus external decision-maker based policies to close the gender gap in parental involvement.