Definitely not Messygirl Lexi. As an earlier poster replied, it's a model that StormyWaters used to shoot regularly. He called her Holly in some of his posts, but nothing else was ever shared about her as far as I know.
Those shoots are probably 10+ years old at this point. Stormy never released full sets, not even on his now-defunct Tumblr, just highlight photos. So we're probably unlikely to see any more of her at this point, as great as that would be.
Her name is Holly. She was one of the best models that Stormy Waters ever used. I have a huge collection of Stormy Waters photos, and she is in quite a number of them.