Is it permissible for a woman to fast three days as expiation for her oath if her husband refuses to sell her gold to feed the needy, despite her financial ability?

The expiation for an oath is to feed ten poor people or clothe them, or to free a slave. If one cannot find [these means], then it is to fast for three days. It is not permissible to resort to fasting if one is able to feed [the poor]. If a woman owns gold in excess of her needs, she is obligated to feed ten poor people or clothe them, and her husband is not permitted to prevent her from doing so. However, if the gold is not hers or is only sufficient for her needs, then she may resort to fasting.