No you are not overreacting. My STBXAH used to drink only beer in the early years, and it gradually increased to wine and then strictly to hard liquor. In fact, in remembering when we went to a weekend for engaged couples for the church we were to get married in he had brought alcohol to the weekend. The signs were all there. What was I thinking???
Make sure you read and read. Please take care of yourself and your kids. You need to be the good example to your kids.