Abstract
This study investigates how family social support enhances working mothers’ job embeddedness by examining the mediating role of psychological availability and the moderating role of family motivation. Drawing on the integrative view of role accumulation theory, conservation of resources theory, and social support resource theory, we propose that family support both generates and preserves personal resources, thereby boosting mothers’ psychological availability. In turn, psychological availability facilitates job embeddedness. Moreover, high family motivation amplifies the direct link between psychological availability and embeddedness, although it does not condition the entire mediation. These insights contribute to the existing literature on dual-role sustainability and inform supportive organizational practices.