Warning, extremely cursed insights follow:
Does this plot development remind anyone of Breaking Dawn, the final Twilight book? How there was a magic half-vampire baby that everyone thought was one kind of magic half-vampire baby that was already known and is extremely bad news, but it turns out she was actually a different kind of magic half-vampire baby that was not bad news and which nobody knew about/everyone assumed was impossible, and there was almost a giant showdown about it but then the ending was an anticlimax of hugging it out?
You're welcome, and now we've all learned something about my, and possibly yrsillar's, taste in literature.