What do you call a cousin's mother-in-law?

Answer 1

If your sister-in-law is the sister of your spouse, her mother is your mother-in-law.

If your sister-in-law is your brother's wife, her mother is only your brother's mother-in-law, but is not related to you.

Answer 2

The English language has no special term for the mother-in-law of a cousin. You may call her your cousin's mother-in-law.

You not realted at all by blood and you cant say you realted through marriage as she does not share colse eough blood relative to you to been some stort in law to you.

Answer 3

You not realted at all its just like you sibings mother in law.

But you sitll can think of her as part of family if she becomes apart of family.