Sexual satisfaction is an important contributor to relationship functioning that is not well understood among first-time parents, at a time when relationship functioning is important for the well-being of parents as well as the child. The current study examined how several dimensions of individual and relationship functioning among first-time parents (coparenting, division of household and paid labor, parenting stress, and role overload) at 6 months postbirth predicted multiple domains of sexual satisfaction at 12 months postbirth, in a sample of heterosexual first-time parents. Role overload, work hours, and division of household labor each predicted at least one domain of sexual satisfaction for both mothers and fathers, whereas parenting stress was a unique predictor for mothers only. The implications of these results for first-time parents are discussed.