BB called her a “young girl” just like how Vegapunk and Saturn have been. He probably learned her secret by deactivating her fruit with the Yami
It's pretty well ensured that he had tested this. Damn.
That is disgusting. Imagine he deactivated her powers, learned she was a kid, and then continued on that, "Be my woman." stuff.
However, the phrasing and the context change things too. He said, "Woman." It is possible in that particular scene he hadn't learned she was a child due to his speech. Then, there is the context in which her Devil Fruit changes her age to be unfixed. So, at that time, he may have understood she was a woman and not a child.
All that aside, Bonney herself experiences different ages. Her brain actually gets changed because she changes her physiological characteristics. When she is in the form of a woman, she is actually a woman in every physical sense including her brain development. Though, it's challenging to consider how that would affect her mind. In any case, she is an Age Manipulating person. At this point, with her, it's not entirely clear what the implications are behind her actions or anyone else's actions.
Don't judge each other too harshly about it. It's just a story. But ya this definitely threw us all off balance. I'm not sure any of us feel comfortable discussing it.
Show me the part where he calls Bonney a little girl. I think that would be helpful to learn more of the context in that situation.