Half asleep here and I have to go very soon, so I wasn't able to read long enough to take notice of wether someone proposed this yet or not.But if the girl repetedly shows sexual behaveyor that way, don't you think it's possible that she's copying it from home?
Either having her father/uncle/mother or someone lead up to harassing her or another person that way?

Seeing the young age, she may not even realise that what she's doing is wrong.Children often copy the behaveyor of their parents, and I know more then a few little girls that would do anything just for a person to say they're as pretty or smart as mommy is.

I really hope this isn't the case, but I'm not going to claim it's not possible.

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In either case, I would write more but I'm out of time.Cheers, and hope everything goes well.Best of luck.