姑

彼（かれ）は奥（おく）さんがお姑（しゅうとめ）さんとうまくやっていけるかが心配（しんぱい）だ。

He is worried whether his wife can get on with his mother.

姑（しゅうとめ）とは仲良（なかよ）く暮（く）らしています。

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