What Is It Called When A Sister Married Her Brother?
What Is It Called When A Sister Married Her Brother? A sibling-in-law is the spouse of your sibling, or the sibling of your spouse, or the person who is married to the sibling of your spouse. More commonly a sibling-in-law is referred to as a brother-in-law for a male sibling-in-law, and a sister-in-law for a