In-law (noun)

A person related by marriage to one's spouse or partner.

Origin:

From in- ("in") + law ("related by marriag.e")

Examples:

1. His in-laws were very welcoming to him when he married their daughter.
2. She was very close to her in-laws and saw them often.
3. He didn't get along with his in-laws and they rarely visited.
4. The in-laws were invited to the wedding but only a few came.
5. His in-laws were very supportive of the couple's decision to move abroad.