The entry of women into the labor market in Brazil brought greater demand for third-party child care.Historically, child care (also performed by family members) has been transferred to nurseries, schools and when carried out in the family residence becomes the responsibility of the nanny.The present research brings up the discussion of care work carried out by nannies in the domestic context seeking to understand their work activity, the emotions related to care and explore the relationship dynamics among the professional, the child and the family.As a methodological reference this research used in-depth interviews and analysis of narratives based on nine interviews conducted in the city of São Paulo.The study emphasizes the issues related to nannies' regular duties, as well as affection and trust at work from the nannies point of view.The research is based on theoretical studies about care from sociology, psychology, and the economy of care.At our findings, I discuss the nannies' care work precariousness, paid and unpaid care work, as well as the relationships of nannies with children regarding bond, intimacy, affection and loss.