婆婆mother-in-law; husband's mother; grandmother丈母娘mother-in-law; wife's mother
都是mother-in-law
mother in law二人依法结为夫妻，那么彼此的父母，就是彼此法律上的父母。婆婆，岳母（丈母娘） mother in law公公，岳父（老丈人）father in law
