Ask the Editor
Can I call the sibling of my spouse 'brother'? — Rajan, India
The brother of your spouse is called your brother-in-law. If your spouse has a sister, she is your sister-in-law.
You also call your own siblings' spouses your brother-in-law (the husband of your sibling) or sister-in-law (the wife of your sibling).
Your in-laws are people you are related to by marriage. Below are more in-law terms:
mother-in-law: the mother of your spouse
father-in-law: the father of your spouse
aunt-in-law: the aunt of your spouse
uncle-in-law: the uncle of your spouse
daughter-in-law: the wife of your child
son-in-law: the husband of your child
I hope this helps.
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