I totally agree with @van it’s best you take timeout away from him . Temporary timeout for you and your mother . If you have family maybe try talking through them . It’s sensitive issue and it seems you love your dad it’s heartbreaking situation .
Talk it through family counselling and ask him to enter rehab for best of the family . If you think he is not lost cause then there is hope for him and your family .
One of the worst advice on internet , da hell is wrong with you 
Talk it through family counselling and ask him to enter rehab for best of the family . If you think he is not lost cause then there is hope for him and your family .
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kill him before he kills you
