The authors examined the relationship between sibling structure variables (i.e., gender, number of sisters, number of brothers, sibling spacing, number of siblings, and birth order, all men, and all women siblings) and current relationships with parents and spouse/partners. Participants included 519 adults between the ages of 19 and 59 years. Two separate canonical correlations were conducted. The results for men indicated that being a younger man with an all-male sibling group was related to more intimacy with parents and more intimidation by parents. For women, being an older woman with more brothers and more siblings was related to less intimidation by parents and less intimacy with parents and spouses/partners.