A daughter-in-law is your child's wife. When your child gets married, their wife becomes your daughter-in-law, and you become her mother-in-law or father-in-law. The relationship works both ways: she's your daughter-in-law, and you're her parent-in-law.

The term recognizes a real family connection that comes through marriage rather than birth. Many families grow closer when someone marries, welcoming a new person into holiday gatherings, family traditions, and everyday life. A daughter-in-law might share recipes with her mother-in-law, help care for aging parents, or become an aunt to her spouse's siblings' children.

Throughout history, the daughter-in-law relationship has been important in many cultures. In some traditions, a new bride would move into her husband's family home and learn customs and skills from her mother-in-law. Today, these relationships look different in every family, but the basic idea remains: marriage creates new family bonds that extend beyond just the couple getting married.