This study examined the intrapersonal and interpersonal mechanisms underlying family member reports of negative relational disclosures and closeness. Participants included a mother, father, and young adult child from 170 families (N = 510). Social relations analyses revealed that negative relational disclosures and closeness vary across family relationships as a function of actor and relationship effects. Mothers’ reports of negative disclosures from other family members varied primarily as a function of actor effects, whereas their closeness varied as a function of relationship and partner effects. Dyadic reciprocity emerged in both the father–child and spousal relationships. Fathers who received negative disclosures from their spouse and their child were more likely to have both family members report being closer to them, respectively.