Emotional expression may provide an ambiance in which parenting occurs and, in this sense, serves as a context that has an indirect impact on child adjustment. This study investigates a mediational model for emotional expression and delinquency in which specific emotions were tested as contexts for parental supervision of adolescents. A model was presented in which the relationship between emotions and later delinquency was fully mediated thorugh a measure of Lax Supervision. Maternal humor as a main effect, the interaciton term for maternal and adolescent contempt, and certain levels of adolescent neutral explained variance in Lax Supervision. Fathers’ emotions did not contribute significant effects in the models. No direct relationship was found between emotional expression and Delinquent Peer Association or Delinquency. Lax supervision and Delinquent Peer Association had large effects on Delinquency, as hypothesized, with 35% of the variance of Delinquency explained in the model.