mother-in-law

For I am come to ſet a man at variance* againſt his father, ⁊ the daughter againſt her mother, and the daughter in law againſt her mother in law.

Odontophobia, or the fear of dental work, seems equally plausible, as does pentheraphobia - fear of the mother-in-law.

Do but consider, my dear Mr. Dashwood, how excessively comfortable your mother-in-law and her daughters may live on the interest of seven thousand pounds,

Mother-in-law and daughter-in-law are a tempest and hailstorm.

I'm getting along with my mother-in-law very well.

She bitterly regretted having said something that displeased her mother-in-law.