Shivaya,
My Dad was almost always drunk when he picked me up from my Mom. He drank while driving more often than not. My Mom knew this and let me go with him every single time. Even as an adult I still have nightmares about it sometimes.
I wish my Mom had had the sense and courage you did. I wish she would have protected me and explained to me - honestly - why my Dad acted as he did. It was hard as a little kid to figure that stuff out for myself, to think somehow it was my fault and then feel that there was no one looking out for me and nothing I could do about it myself.
I know it was a terrible situation, but what a gift you gave your son...
TH