All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad is His slave and Messenger.
According to the view of all the Schools of jurisprudence, it is forbidden for this man to sell intoxicants (all kinds of alcoholic drinks and drugs). Moreover, a Muslim who has money obtained from intoxicants is obliged to spend it in charity, in the general interest of the Muslim community, or on the poor and needy people.
However, if he himself is classified to be among the needy, then it is permissible for him to benefit from the money, but only to suffice his need. Therefore, the Fatwa which you mentioned in your question is not correct.
Besides, this person is obliged to get rid of the intoxicants which he has. Anyone who gives up something forbidden as a form of obedience to Allaah; Allaah will compensate him with something better and will provide him from sources and means which he would never imagined. Allaah Says (what means):
It is an obligation for one to think good of his/her fellow Muslim even if that Muslim committed some sins, and therefore, this woman should not doubt her husband's faith (i.e. being a Muslim). This is just a suspicion and it should not be taken into account.
In addition to this, it is forbidden for this wife to benefit from this ill-gotten money if she has other lawful money. However, if she is forced to (i.e. she can not find any lawful money), then it becomes permissible for her to take from the ill-gotten money to suffice her basic needs only, and she is obliged to seek a lawful source of income.
Finally, if her husband does not repent from this sin, then she should ask for divorce.
Allaah Knows best.