I'd like to offer a few suggestions: First, delete the superfluous stuff above the first chapter, especially your Email address. Weird salesmen often cruise sites like this looking for people to add to their mailing lists. Those who wish to contact you can do so through your bio page under 'Contact Author.'
Your story contains explicit sex, so change the rating to NC-17. Legally, underage kids have to be warned not to read this sort of thing.
There's nothing wrong with changing Middle Earth to suit your story, but give it an AU warning first.
I would also recomend that you develop your characters a bit more before you introduce the sex scenes, otherwise it looks as if your writing about sex for the mere titillation of it rather than serious erotica.
Other than that, you've got the beginnings of a good story.