What is the ruling concerning a husband's money that is spent from his son's earnings from selling drugs, and what should the wife do about this matter?

If the son's wealth is entirely illicit, such as from drugs and alcohol, then it is not permissible to deal with him through buying or selling, nor to accept his gifts or eat from his food. If his wealth is mixed, partly permissible and partly illicit, then it is disliked to deal with him, accept his gifts, or eat from his food, but not forbidden. It is not permissible for a father to take his son's money if its sole source is drug dealing, unless the father is poor, in which case he may take what he needs.