This article examines same-sex couples as a sign of the Second Demographic Transition, investigating how gay and lesbian couples living together in Brasília build their family, whether they intend to have children, and what challenges they face. We conducted semi-structured interviews online to investigate the family formation process and parenting intentions of 42 couples living together in Brasília in 2019, 20 lesbian and 22 gay couples. The organizing themes in the interviews were marriage, children, work, and stigma. This study advances existing scholarship on families by articulating points of connection between the legal institution of same-sex marriage in Brazil, changing social norms regarding family life, and parental gender expectations as signs of the Second Demographic Transition. Studying same-sex couples contribute to a more complex understanding of the family, the gendered division of labor, and the dimension of fertility and parenting intentions.