What is the ruling on a wife transferring her salary to a usurious bank to sponsor her sister after being refused and confronted with the anger of her sister and mother?

If a wife guarantees her sister in a usurious loan, which necessitates transferring her salary to the bank, then her action is impermissible. This is because there is no obedience to a creature in disobedience to the Creator, and guaranteeing a usurious loan is an act of disobedience. However, if the guarantee is for a permissible loan and she is compelled to transfer her salary, then her action is permissible.