Divorce under physical and mental abuse

Hi, i need a suggestion and legal help, Im writing this instead of my girlfriend who is married, she is been married for 4 years and she is suffering from emotional pain and emotional blackmailing and physical and sexual abuse from her husband, she feels uncomfortable to have physical intimacy with him, but he is forcing it although she refuses and she is being controlled what to do where to go almost everything by him she hates him whenever she talks about separation he then emotionally blackmailing that he would kill himself or kill her or threatening he will make her regret lifetime, i know her since 4 months i feel very much connected with her and she really needs my help and i can take care of her, however recently the husband came to know about me he is threatening that he would kill me and her if she comes with me, or he would do some physical harm, i have talked to him personally seems like he has bipolar disorder or some serious mental issue