Please help

Hello everyone, Need some advise on what can be done. I got married few years back and my wife is extremely abusive including psychotically crying fighting and shoulting on top of her lungs to a point where our neighbors could here shouting, loosing her wits and threatening to cut herself and sometimes actually doing so. Reasons could be any small one but it always turns into a huge fight which pretty much takes our weekends, she keeps shouting for hours even if she falls a sleep and gets up in the middle of the night and started to fight. Her such behavior has realy pained my family a lot, my father passed away a few years back and my mother started to stay with us and takes care of our kid. She is abusive to her as well and makes my mother cry because of her abusive behavior and she tries to blame all things on her. We tried to talk to parents and they keep supporting her and keep saying we won't give divorce no matter what. Since few days here abusiveness and fighting has is too frequent and now she doesn't want me to take to anyone from my family and just talk with hers. She is trying to tear my family apart. I have started to loose my mind, I can not sleep properly my weekends are dreadful, I can already see I did take a hit on psychological side. I am afraid that she will file false cases if I file for divorce..