I don't know about anyone else, but I've noticed hints in the third book and major hints in the fourth book, about how Flo sort of likes George and he doesn't know it but there's a small attraction he has for Flo. Believe me or not, I'll prove right in the 5th book.(Last book *tears*).

There's some evidence in the 3rd and 4th book, but I just don't have the energy sorting through the exact page numbers and paragraphs.

Also there's a post I checked out on this forum and it has some theories about the fourth installment. Both came true. Someone should warn readers that it's a spoiler. : (