clarity.....His parents are probably pretty ignorant of the true nature of alcoholism.....most people are, if they have not had a reason to educate th emselves about it....
After all, your husband is requiring others to help care for him, right now....so he is certainly in no shape to be caring for the child.....
and, in addition, he could reach for the bottle at any time.....
However, maybe his parents, the grandparents, could help to watch their grandchild....?