I am a Muslim and I hate my sister. All of my family does. She is a disgrace to our family and has tortured us tremendously. She tried to kill us all one night, throttle my mom and poison my brother. She killed her child while it was in her womb, had relations with other men, doesn't pray or is a good muslim. She But even after that, I let it go, until now, she is again pregnant but she doesnt eat well to torture her child inside her. And this is her 5th month the baby is extremely weak and may have some sort of disorder (I hope not). Then, she plans on abandoning the child after it is born. I hate her and want to cut all ties with her. My mother has become a severe anxiety patient because of her. Is it now permissible to cut all ties with her?