What is the ruling on a wife disposing of gold that her husband bought with money of dubious origin, while not angering him?

The wife should advise her husband who earns money unlawfully, reminding him of Allah's punishment and the consequences of ill-gotten gains. It is permissible for her to accept gifts bought with his mixed money, because the unlawful portion of the gift is not specifically identifiable. The husband should be advised with wisdom and a good approach, even if he becomes angry.