How can one deal with a wife who makes financial decisions and individual expenditures without consulting her husband, refuses to adhere to agreements, and constantly seems to change due to jealousy, despite the husband's attempts to meet her material and emotional needs?

A husband's good treatment of his wife is a righteous deed. It is the husband's right that his wife safeguard him in herself and his property, and it is not permissible for her to dispose of his property without his permission. The husband is advised to return to his family after fulfilling his need abroad, because being away from them without need is not appropriate. The Prophet, peace and blessings be upon him, said: "Traveling is a piece of torment, it prevents one of you from his food, drink, and sleep. So when he has fulfilled his purpose, let him hasten back to his family." The change in the wife should be addressed before the matter escalates. The husband is only obliged to spend according to his financial situation and that of his wife, and he is not required to provide what the wealthy provide.