Background
My mother died 12 years ago when I was 8 years old and my drunkard father (F) married someone else (step-mother, SM) to help him raise me. Past decade has been a disaster for me. I was constantly wrongfully portrayed as a thief, a liar etc. I was also blamed for the beatings bestowed by F onto the SM, but it was their behaviour the whole time, and I was the scapegoat. It was proved when I moved to college and they kept fighting.
Problem
I feel no love towards them and want to move out soon after graduation. I know that I am happier when I stay away from them. I wish I could sue them, but that could drag for a long time. So cutting off all ties sounds like a better idea.
But the other day SM was blabbering something to the effect of "government will require you to pay for my life when I grow old and you start earning". Is there a process in place where people can demand their unwilling children to provide for themselves? I don't mind doing that as long as I want to. But can something force me to do it ?