Who is responsible for returning the money to the wife's brother, and what is the ruling on the husband's action? Is it permissible for the wife to pay off the debt from her own money? Is the wife sinful for not informing her brother of what happened, and what should she do now?

The action of the man's brother-in-law, selling goods without his permission, is an unauthorized act that becomes valid upon the owner of the goods' acceptance and consent. His right to the full price for which the goods were sold (41500) remains an obligation upon his brother-in-law. The husband is not permitted to conceal that amount and take it; otherwise, he is sinful, and his wife is sinful for collaborating with him in sin. The sister is not obligated to pay the amount to her brother unless she volunteers to do so. If she does not, then she must advise her husband to return what remains owing to her brother from his money.