If all she's been getting out of the "potential investor" scam is free dinners/trips/etc. and doesn't have significant assets, suing her is probably a money-losing proposition.
since i don't know how to contact you elsewhere, I am going to ask in a thread. I just noticed in your profile you mentioned moving from copenhagen to the US. what happened?
Family & work reasons. My parents live in the U.S., and I had a contract position at a university in Copenhagen that was extended a few times and recently ended, so it was a good time for a move. Copenhagen's a nice place to live though!