Despite her son's divorce, she still often invites her ex-daughter-in-law to dinner.

ex-daughter-in-law 是由前缀 ex-（表示"前"、"前任"）和复合名词 daughter-in-law（儿媳）组成的复合词。 daughter-in-law 是由 daughter（女儿）和 in-law（法律上的）组成的复合词，指"媳妇"或"儿媳"。 ex-daughter-in-law 指"前儿媳"，即因离婚而不再是法律上的儿媳关系。