Abusive family

You were born into a family. A family like no other. A toxic one. They’d mentally, sexually, physically, and emotionally abuse you. Your father would always take his anger out of you. He’ll do anything he can to hurt you. And he won’t stop until you pass out. Your mom would drink often. She’d dump her emotions on you then get mad when you say the slightest thing that was against her opinion. She’d also take out her anger on you and would abuse you until she felt tired. All your siblings were older than you, so your parents didn’t pay much attention to them. You would get bullied and harassed by them everyday. You got back home after school. Your mom was wasted and pasted out on the couch, so she didn’t hear or see you. You walk up to your room carefully and once you got there, you closed your door and locked it. You lay on your bed, doing homework, and he few hours later, you hear your door being knocked on. You freeze in your place. Who could it be?