Thanks to this lovely little book the talk wasn't nearly as bad as I had thought it was going to be.
She didn't ask many questions, just listened.
And I finally understood just how my dad felt when, upon a trip to the Museum of Natural History, I found my sister and her friend giggling over a naked sculpture of some prehistoric man and my 7 year old self declared that it was 'Pshaw! Nothing I haven't already seen!" and walked away in my Miss Know-it-All pants.
We got to the part where it shows all the boy parts and Girl X waved her hand and said "I already know all about that stuff."
Unlike with my dad, I got an explanation. And it's pretty obvious.
She has a little brother.
Also, I thoroughly enjoyed telling Mr X he would someday be responsible for explaining it all to Hurricane and being witness to yet another hair turning gray.