If you want to read the rest go to fanfiction.net, under the same name: Myrddin Ignis Magus - UnCharted Bandit.
He has two sisters. As for the rating. I would rate it M here too, which amounts to R as far as I'm concerned. Its pretty mild on the sex.
I don't think I'm going to continue uploading anything outside of fanfiction.net. These sites are so much hassle compared to the best, and really primitive, and I can't even upload a simple docx file on any of them but fanfiction.net.
Plus, I don't think the admin of this site care anymore. Look at the Harry Potter section and you'll see that they haven't added in such popular characters as Daphne and Astoria Greengrass for just two examples. Then I had seen a spammer posting a copy of their, buy from me crap on the homepage post and still their account exists.