What is the ruling regarding a wife breaking her oath to not return to her husband's house after having sworn repeatedly that she would not return to it, and is there sin upon her for doing that?

A woman does not sin by returning to her husband's home; rather, she must break her oath and return, based on the Prophet's (peace and blessings be upon him) saying: "By Allah, if Allah wills, I will not take an oath and then see something else as better than it, except that I will expiate for my oath and do that which is better, or do that which is better and expiate for my oath."

If one swears by Allah repeatedly on the same matter, only one expiation is required, which is feeding ten poor people or clothing them. If unable to do so, then fasting for three days.