I will give you a few clues about when the curse will strike. One, your daughter will become more moody, almost like its all of a sudden. Two, she will likely have started developing breasts. Well, she's not budding yet, but she has been quicker to emotional outbursts in recent months (though that sort of thing isn't unusual for her anyway).
At least my wife has talked to her about "crossing over", so she probably won't go into shock about it when it does happen.
After she's done "crossing over" I think I want to step in and be a part of the growing up conversations. Right now, I'm leaving it to Mom.
I've got the three boys to deal with, which is a whole 'nother world.
From personal experience, I felt betrayed by my body (and my boy friends) when I hit puberty. I just wanted to play football, swim, and be my regular tomboy self. It was so hard for me to understand why the boys that always wanted me on their football team suddenly wanted me on their team for a different reason. Tackle football turned into 'grab her boobs!'. Not an easy time for a young girl who just wanted to be a young girl.
Please tell your sons that puberty is just as hard, if not harder, for young ladies. And to respect them in every way possible.