Is there anyway to fix what my family has become?

Things can be very hard. You might need to go to a counseler in your school. And you can try to comfort your mom, you both can comfort each other. I had someone in my family who was on lifesupport and the doctor told us she was going to die, but we didn't give up hope and she's still alive. Your sister really needs someone to tell her she's going to be alright. And she's probably stressed too, being sick isn't the most relaxing thing. Your father is probably stressed too, not that that means he can attack you. But some people deal with certain things different, maybe not a good way. Depending on if you belive in god or not just have hope she's going to live. And you can tell your father how you feel, and you know he's under alot of stress, and tell him how much you love him. Your parents love you. your sister loves you. Things are hard now, things can't be perfect but they can be better. I hope thing get better for you Ani.