I suggest you understand the main thing - you have not committed any crime. You didn't know that this woman from a dating site is someone's wife. If you knew, I'm sure you would stop communicating with her. I recommend you a good law firm "Brander Smith McKnight Lawyers" and a link to their page https://bsmlaw.com.au/. Call them now and ask how they could help you. The husband of this woman, being a politician, has no right to drive himself like that. I am sure if he finds out that you have turned to professional lawyers, he will stop threatening you.