Scarlett, I know it is hard,but your mum should leave him, we are only here the once,so we have got to make the most of it, she sounds very sad and at a time she should be looking forward to a happy retirement, I think she really needs to sit him down,tell him to shut up and listen for once,and really let rip at him,it might even shock him into thinking a bit, you say he is "violent" does he hit your mum,please tell me he doesn't, if he won't listen to ypour mum,maybe you all need to sit down and tell him things have got to change, I wish you luck Scarlett, xx