Is a mother sinful for her daughter's ill-treatment of her if the mother is content with it?

A daughter's mistreatment of her parents is considered an act of disobedience (uquq), which is one of the gravest sins. The Prophet, peace and blessings be upon him, said: "Shall I not inform you of the greatest of major sins?" They said, "Yes, O Messenger of Allah." He said, "Associating partners with Allah, and disobedience to parents." The mother's patience or رضا (contentment/acquiescence) does not waive her right to dutifulness (birr). The daughter must repent from this sin.