mother-in-law：婆婆，岳母；father-in-law：公公；岳父sister-in-law：妯娌 大姑 小姑brother-in-law: 小叔 姐夫 妹夫
mother-in-law 婆婆，father-in-law 公公
婆婆：mother in law公公：father in law
