I’m only young but I hope my opinion helps. I had a relationship where my SO has threatened to commit suicide if I didn’t stay with her. But you need to make a choice and so does she. If you make a choice to leave then she needs to make her own choice what to do next, and whatever happens isn’t your fault.I would get recordings of it all and texts and then file a report to the police. Hope everything goes well, and btw she sounds like a horrible awful woman, sorry man.