The article evaluates the link between family movements and children’s socioemotional development. Using a longitudinal survey, we can track the number and role of household members and measure the children’s development. We identify the movements of household members during the first seven years of a child’s life. Our findings indicate that the entry of a new member into the household has a negative impact of approximately 0.2 to 0.3 standard deviations on externalizing and internalizing problems, particularly among low-educated households. These entries affect household life, undermining housing quality and limiting the mother’s ability to manage her time effectively. The limited access to maternity leave and breastfeeding working conditions do intensify these inequalities. By analyzing specific movements, we observe that the father’s long-lasting absence impacts externalizing problems. These results hold strong across different samples and specifications, and our study gains causal power by employing the Oster methodology. Despite the impacts on high- and low-educated households, their background plays a role in coping with stressful environments. In low-educated households, stabilization is not achievable even after several months, further exacerbating socioemotional problems.