Is dealing with women by providing nutritional advice for a fee considered aiding in sin, and does it make the money earned unlawful, especially since most women in this country do not adhere to the Islamic dress code, and the goal of weight loss is often to improve appearance? And does using information and advice from copyrighted and pirated books make the earnings unlawful?

There is no objection to offering consultations on weight loss for a fee, as this is permissible and legitimate. The fact that some of those seeking advice may be immodestly dressed does not affect the permissibility of the act, as their sin is their own. A permissible act is not prohibited merely on the presumption of potential harm. Furthermore, acquiring information from copyrighted books or websites for use in these consultations does not affect the earnings. However, the sin of infringing upon the rights of the owners of these books or programs and ensuring their financial rights therein is a matter that requires further consideration and detail.