It's a variation of a scam that started way back in the streetwalker days and in more recent days was commonly used on BP. Sorry this happened to you, but these scammers are almost always lowlifes who really are only interested in the lousy couple of hundred bucks they get from each victim. The chances of her "Aunt" actually reporting you to LE or her even being her Aunt are remote.
As for your recourse, I would most definitely notify SA Admin so they can red flag her account and her profile which will make it a bit tougher for her to create new accounts in the future. I don't honestly know if SA makes the younger SB's prove their age or not, but I do know that once a profile has been flagged SA does have at least some safeguards in effect, similar to the guys that get booted off the site, that make it MUCH harder for these scammers to create new profiles.
I know it's tough to understand why someone would go through so much work for a lousy two hundred bucks, especially when a cute girl can make so much more by actually getting a bunch of SD's who see her on a regular basis, but I guess in her mind she'd rather be a thief than a ho. Go figure. There used to be hundreds and hundreds of these kind of ROB reviews on TER before FOSTA/SESTA. I know you can't review her, but you can do the next best thing and make SA aware of her scam. SA will do everything in their power to keep rip offs like her off the site as it's THEIR reputation that takes a hit every time something like this happens.
One question for you. WHY in the fuck did you answer the door without preparing yourself for this. I am sorry, maybe it's from growing up on the wrong side of the tracks, but I would NEVER just open the door in the situation you found yourself in. I grew up with pimps, hookers, junkies and dealers being a part of my life, I don't need to pre plan a game plan for this type of situation, it's just natural for me after all these decades, but for the rest of you, you really should plan ahead for these types of eventualities so you don't get caught flat footed when the time comes. I think everyone here should have an idea of what to do if faced with the situation you found yourself in. Your response of course should be consistent with your personality of course. I am much more the type to be confrontational, and to answer the door with gun in hand. (It also helps to live in Texas where I am within my legal rights to do so), your personality might not be the type to confront a would be robber, so keep that in mind too. In hindsight you might even conclude that there is nothing you would have done differently, but it is something that EVERYONE who does this needs to at least think about BEFORE it happens to you.
I know your biggest question is if you have anything to worry about going forward, and I can assure you that It's VERY unlikely that anything she told you is the truth and your chances of ever hearing from either of them are extremely remote. BTW were you in your RV at the time?