Blackmail attempts and now sending texts to my wife

I was on Seeking Arrangements and was going to meet a potential SB. Right before FaceTiming they sent the following message to me:

“I'm going to send all of this including your profile to your, your guys family friends and work places if you don't give me what I want. If you ignore me or don't respond I'll expose you either way. I have everyone's phone number, addresses, etc.”

They are asking for $5k to stop and I can live in peace.

I’ve never seen this aggressive before: I read the discussion board and mentioned:

“18 U.S.C. § 873 is a federal law that prohibits blackmail and extortion. It's part of Title 18 of the United States Code, which covers crimes and criminal procedure.”

They mentioned: “You aren't the first to try and pull that card. That doesn't bother me. You will never find out who I am. I know everything about you. Are you going to call the police and say a random person is gonna tell your wife that you're paying young girls to have an affair with you?

“I'm not playing this game anymore. You're not the first and won't be the last. I've only had to expose one person out of all of them for not cooperating and I guess you'll be the second. Expect a lot of phone calls and texts from friends and family. Goodbye”

They have sent two messages to my wife.

One confirming if it’s my wife and sent a text message saying I’m cheating.

I don’t know what to do next and I need help. Do I just send the money?