Mom threw me out when I was 17. She came home drunk (a daily occurence) and was beating my younger brother (usually it was me) so I grabber her and carried her to her room, put her in her bed, and told her 'I don't care if you drink your life away but your not beating any of us again !' She told me to get out and never come back; I did.
She never beat the other kids again thou. 20 years later she quit drinking but she says she doesn't remember ever beating us.