This study investigated associations of low-income working mothers' daily interactions with supervisors and their interactions with children. Sixty-one mothers of preschool-aged children were asked to report on their interactions with their supervisors at work and their interactions with children for 2 weeks (N = 520 workdays). Results show significant within-day spillover from the quality of mothers' perceived work interactions with supervisors to their reports of interactions with children. Supervisor criticism was positively correlated with harsh and withdrawn mother–child interactions on the same day. Supervisor recognition for good work was positively associated with warm mother–child interactions on the same day. Lagged analyses showed some significant associations between perceived supervisor interactions on a given day and mother–child interactions the next day.