I'm afraid, oh Person of No Interest, that you've vastly overestimated your constituency.
Here, among the NC-17 Ficwad crowd, they don't see this as one minor violating an eight-year-old.
They see two consenting partners, one aged beyond his years, and one belonging to a species that apparently sexually matures before they're toilet trained.
What peaks my curiousity is what fallout this is likely to have. Not from the Hogwarts crew, I think I can guess that. What happens when Harry realizes that the only word he has to go on in terms of what's "acceptable" in Veela society is that of the little girl who all but admitted that this bond had her thinking exclusively with her glands.
"Really, Monsieur and Madame Delacoeur, she told me that sex with children is common in your people's culture. I'm serious."
Author's response
"Person of No Interest". I like that.
My impetus for the warning was simply that, while there are a lot of stories involving/including underage sex to be found on Ficwad, there are few that include partners quite so young. Truthfully, once I started writing the story, it became an exorcise in convincing the reader that the sex was, in this case, actually acceptable.
As for fallout, it's likely nothing that you're expecting as I've never seen another story that handles it quite the same way.
I hoped you liked the story so far and hope also that you continue to do so.
NOI