Daughters in law have no responsibility to support their parents in law.
Daughter in law and son-in-law do not belong to the category of legal supporters. They only assume the obligation of assisting in the maintenance. The law does not stipulate that daughter-in-law has the obligation to support her mother-in-law and son-in-law to their parents in law.
[Legal Basis]
Article 26 of the Civil Code states that parents have the obligation to support, educate and protect their minor children. Adult children have the obligation to support, support and protect their parents.