do you believe that your daughter is drinking daily? and driving children around, while under the influence, daily? i'm not sure what the best course of action is, but i think having an honest talk with your son-in-law is a good start. if it is predictable that she will show up at a daycare center sloshed, then i would think they'd pick up on that pretty quickly. and if they don't? maybe the director at the center could be tipped off that this is a daily, or frequent, occurence? that seems to possibly be a way to get protection for the children, yet you are not in the middle.