I'd wouldn't call what happens in Game of Thrones pedophilia. By American legal standards, its very blatantly such, but Dany was a young adult, not a child, within the culture of the series. She wasn't prepubescent, she was just significantly younger. As you can see with a lot of the standards, such as Sansa's first period, they pretty consider menarche to represent adulthood in women. Joffrey was not much older than Sansa at all, and it was pretty much a given that very soon after to soon approaching wedding, they would be sleeping together.
Anything involving children significantly younger than that is portrayed as twisted even within the confines of the book, but 12+ was pretty openly accepted.
Besides . . . despite the show's representation of Dany and Drogo's wedding night, I thought it was very tasteful in the book. Drogo went out of his way to be respectful, and while the show's interpretation of his "No"s seem to be saying "No, don't cry", the book seemed to be implying he was asking "No?", in that he was giving her a choice. And she accepted. If there is one change in the show from the book, its that they made a tasteful and gentle scene into a borderline rape scene.
- dutifully, Kastrel Tyraegen Faendryl, the first freelance guildmaster of the Sorcerer's Guild