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.
First of all, we ask Allaah to cure you and cure your sons, and enable your husband to repent and guide him to the straight path.
Indeed, you did well by advising your husband about him selling intoxicants and we advise you to continue doing so in a gentle manner while supplicating Allaah to guide him. Allaah Says (what means): {And when My servants ask you, [O Muhammad], concerning Me-indeed I am near. I respond to the invocation of the supplicant when he calls upon Me.}[Quran 2:186]
If there are any scholars or righteous men who could influence him, then you may seek their help so that they would try to rectify him. You should remind him that these diseases that you are afflicted with could be because of him selling the mother of all evils [intoxicants]. Indeed, a person may find the effect of his sin in his family; it is for this reason that one of the righteous predecessors said: “I commit a sin and I find its effect in the way my riding animal behaves and the way my wife treats me.” Allaah Says (what means): {And whatever strikes you of disaster — it is for what your hands have earned; but He pardons much.}[Quran 42:30]
As regards you and your children eating from your husband’s earnings, then if his earnings are mixed between lawful money and ill-gotten money, then it is disliked to eat from it but it is not forbidden. However, if his earnings are absolutely unlawful, or that he feeds you from the ill-gotten money, then whoever amongst you [you and your children] has money, he/she should not eat from his [your husband’s] money, otherwise it would become permissible for him/her to eat from his money because of the necessity, and whenever Allaah suffices him/her (with lawful money), he should not eat from that unlawful money. For more benefit, please refer to Fatwa 87680.
Allaah Knows best.