Contributing to the family violence and conflict literature, we examine prospective and concurrent risk factors associated with verbal and physical aggression toward mothers by 15/16 year-old adolescent sons and daughters. Data from the Quebec Longitudinal Study of Kindergarten Children is used to examine the influence of socioeconomic factors, inherent individual and family environment factors, and prospective and concurrent parenting process factors as predictors of adolescent aggression (in the last 6 months). A childhood behavioural pattern characterised by physical aggression generated the highest risk of adolescent-directed verbal and physical aggression toward mothers. Aggressive parental punishment in the last 6 months significantly predicted aggression toward mothers. A childhood life-course of violence seems to culminate in verbal and physical aggression toward mothers during adolescence. Given this building-up process from childhood, harsh parental punishment of the adolescent seems to only increase the odds of adolescent aggression. No sex differences were observed. (Contains 3 tables.)