I'm at a loss on how to assist my friend. Six years ago, she had an affair with someone who has since become a nightmare in her life. This individual has been controlling her since she ended the affair, using tactics like stalking, blackmail, and harassment. She lives in constant fear that he'll expose her to her husband and destroy her family, as he threatens to do so daily.

He exhibits traits of narcissism and psychopathy, making the situation even more terrifying. My friend feels powerless against him and refuses to pursue a restraining order out of fear that it will provoke him further and lead him to her husband.

To make matters worse, he exclusively communicates with her through a messaging app that automatically deletes all messages, leaving no evidence of his threats or manipulation.

I'm desperate to help her. What steps can she take to protect herself, and how can I support her through this ordeal? Any advice would be greatly appreciated.