My sister needs to love herself, am i wrong?

ok i understand that you love your sister and don't understand her choices but if you really care about her you just have to be there for her no matter what she chooses because if you try to make sense out of something that you don't understand and tell her this and that you will just push her further away and closer to him even though he doesn't deserve her! I personally don't believe the crap about how women stay with a man for the child because it just damages a child more to see that so therefore i just think it's because they choose to be dumb and they love the guy! however if you want to push your sister further away and closer to him then keep on telling her what wrong and right in your eyes!!!!!