Objective: By looking at the school-based sexuality education experiences of migrant mothers in Tiohtià:ke-Montréal (Canada), this article aims to shed light on the diverse and often invisible ways in which parents become involved in their child's sexuality education. Method: Qualitative virtual asynchronous focus groups. Results: The findings shed light on the different ways in which migrant mothers become engaged in their children's sexuality education. The results showed that participants engaged with cultural perspectives by discussing sexuality education topics with their child, thereby mitigating the power imbalance between themselves and the school by building on the parent-child relationship. Mothers also made their voices heard by actively becoming involved in change. Conclusion: Aligned with the principles of culturally responsive education and school-family partnership, the analysis and discussion raise awareness about the limitations of existing school-based sexuality education curricula, particularly when it comes to recognising and empowering parents as primary educators. Moving forward, the research urges educational institutions and actors to learn from the challenges faced by migrant parents and the strategies they employ. This learning can then be used to inform the development of school-based sexuality education curricula and policies so as to ensure that they are more responsive to the needs of migrant students and families.