Is it obligatory for the wife to know everything about her husband, including his monthly salary?

The best approach in married life is harmony, understanding, and consultation to achieve happiness and stability. If the wife is sensible and well-behaved, it is better to inform her of private matters, such as the monthly income. However, if she does not behave well and burdens her husband, it is better not to inform her of his private affairs. The husband is not obligated to inform his wife of his monthly salary, but there is no impediment to doing so.