In recent years, interest in family-to-work interference and its consequences has increased dramatically. Drawing on conservation of resources theory, we propose and test a dual spillover spiraling model which examines the indirect effects of family incivility on workplace interpersonal deviance through increasing family-to-work conflict (resource loss spiral) and decreasing family-to-work enrichment (resource gain spiral). We also examine the moderating effects of family-supportive supervisor behaviors on these indirect effects. The findings from a three-wave survey, with 455 employees and their coworkers in (...) 60 teams, reveal that experienced family incivility (Time 1) induces more interpersonal deviance at work (Time 3) through facilitating family-to-work conflict (Time 2) and inhibiting family-to-work enrichment (Time 2). Such indirect deviation amplifying effects are mitigated by higher supervisor-level family-supportive supervisor behaviors (Time 1). Theoretical and practical implications are discussed. (shrink)