If you were trying to give a wedding planner an idea of how you wanted everything to look, showing them pictures or referencing scenes from a movie would be more helpful than passages from a book.
A Twilight wedding is not for me but it's not like she made Arie wear sparkle makeup. It's a ceremony in a forest setting. Even if she got the idea as a teenager watching the first Breaking Dawn, it's not particularly odd, as far as weddings go. At her age, she could just as easily have had a full Disney Princess or Harry Potter theme (which is fine, if it's your wedding and it makes you happy, but obviously stands out more as a fangirl thing compared to this).
Wait---you're being nice, not snarky----I call foul! ; )