<human>: Can you provide a brief overview of the text?

My parents have always had a bad relationship with each other. They fight with each other pretty much every weekend. It ends violence from both sides. Scratching, hitting, etc. It's been like this pretty much my entire life. 

The fights usually end with my dad putting my mom on "house arrest" (not letting her leave after a fight, worst case was one day he tried to stop her from going to work). They regularly threaten to kill each other.

He's manipulative and controlling. He used to control me through violence too, but after an incident in which he got hurt, he decided against it and instead threatens to throw me out of the house. Plus I have a 6 year old sister.

I honestly despise this household, but I don't want to call the police/do anything because I want to keep my current life, and because I want my sister to be able to live with both parents, but this household is so bad I don't know what to do anymore.

I'm currently a senior.
<bot>: Abusive dad, parents keep fighting, I want to do something but I don't know what to, also have  a 6 year old sister.