You need to get some legal advice from a lawyer who specialises in adult industry before doing this. AFAIK as a content producer you need to worry about 2257 compliance & model releases. Although you probably won't have to worry about obscenity laws unless you get her doing something really nasty. BUT that said, if you're a soft target who clearly doesn't have your legal ass covered, a bored goverment official is likely to come after you.
Regarding stopping the magazines from getting her, if I wanted to be commercially ruthless, I'd probably be inclined to market her under a good stage name, and ensure that that I owned the trademark rights to the stage name, all related domain names.
That means if she hits any kind of fame before the mags try to steal her, it's a real pain in the ass for her to rebrand. It also give you an exit as you can sell the name.
Again, get legal advice as it's the sort of area you could really get into a mess with.
Regarding stopping the magazines from getting her, if I wanted to be commercially ruthless, I'd probably be inclined to market her under a good stage name, and ensure that that I owned the trademark rights to the stage name, all related domain names.
That means if she hits any kind of fame before the mags try to steal her, it's a real pain in the ass for her to rebrand. It also give you an exit as you can sell the name.
Again, get legal advice as it's the sort of area you could really get into a mess with.