What is the ruling on using a bank credit card with an overdraft facility that involves usury, and is the money earned through it unlawful, and what is the ruling on her sons and daughters, and is there a sin upon her daughter who advised her?

A woman borrowing from a bank with interest is forbidden usury (riba). However, this does not make her lawfully earned money unlawful, and there is no objection for her family or others to deal with her or benefit from what she gives them. It is permissible for her daughter to use her card to withdraw the mother's or father's balance deposited in the bank, but it is not permissible for her to withdraw if there is no balance, because that would be an interest-based loan. The woman must be advised to stop withdrawing any amount exceeding her balance, as it is an interest-based loan. She must fear Allah and repent from this forbidden act, for which Allah and His Messenger have declared war against its perpetrator.