What should my friend do?

So my friend messed up pretty bad and is scared. He went on an adult website and contacted a woman for a couple of personal videos. He paid for them and got them. She asked to meet and he agreed. She asked for face pic for safety and he did. She didn’t meet because she asked for more money and he said no. Somehow she found out all his info like where he lives and all his family & friends on Facebook. She threatened to message everyone he knows and show them the messages unless he paid her to keep quiet. He’s been paying her for almost a week. He sent her a little of over $1000 and wants $800 more but keep saying after each time he pays that she’ll stop. I read all the messages between them & it looks like she’s gonna continue to threaten him unless he pays. So please anyone, what should I tell my friend to do? He’s scared that she’ll destroy his life. Help

What should my friend do?
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