Legal analysis: From the legal point of view, there is no law in our country that clearly stipulates that a daughter-in-law has the obligation to support her in-laws, and it is not against the law not to support her in-laws. But the law encourages daughters-in-law to support the elderly.

Legal basis: According to Article 129 of the Civil Law of People's Republic of China (PRC), a widowed daughter-in-law has done her main duty to support her in-laws, and a widowed son-in-law has done her main duty to support her in-laws, so she is regarded as the first heir.