Is it permissible for a wife to express her opinion to her husband regarding the prioritization and eligibility of relatives for financial assistance, and is she sinful if her opinion prevents aid from reaching those who are undeserving, knowing that the husband trusts and acts upon her opinion?

Helping his needy brothers and sisters is a noble deed and a great act of worship that brings an abundance of sustenance and blessings in life. However, a husband should prioritize fulfilling the essential needs of his wife and children before his brothers and other relatives, as they have the foremost right to his kindness and benevolence. You must advise your husband with truth and justice regarding who is most deserving of charity, for advice is obligatory for the one who seeks it, and it falls under the general category of advising Muslims.