If this were a situation that arose often I would tell her to fuck off. But it's not. It's a pretty rare occurrence. At least for me, anyway. So here's what I would do based on what I know so far. I would consider NOT selling her the rights but still pulling her content from obvious places. Tours, members area, fhg's, etc.
Let's face facts, it's on the web. It's out there. Can't put the genie back in the bottle.
You can charge her money. She pays it. You do your absolute best to get everything down. Couple years later someone she knows finds it somewhere on some other site and she's back bitching at you. Perhaps claiming you scammed her. Being a pain in the ass, for sure.
So I would consider telling her that you will remove her content from your site for free and that you will remove any fhg's or anything else in your control, for free. And that that should keep her from ever hearing about it from anyone she knows. You will not, however, sell her the rights to her content. Explain to her that it's out there. There's no way to scrub it 100% but you'll do what you can and that's all you can do. In this scenario you haven't taken money from someone who, right or wrong, is expecting to buy her way out of a problem that is simply not going to 100% go away ever.
And, who knows, if she ends up being the next Lucy Liu (or Margaret Cho
), you got yourself a nice little content package on which to retire. :-)