Living with an Alcoholic Mother and Her Eating Disorder

my mother is an alcoholic but she also had a condition were she cant eat without throwing it all up. Drinking 'confuses her body' but she just drinks for the hell of it now. My dad buys her beer and claims that " he drinks it too" and that hes been encouraging her that its not healthy. My mother also comes into my siblings room with me in there and starts yelling at us while shes drunk out of her effin mind. The only reason why I smile in front of them is because of my sibling (lets call them vev).