Your girl is a clever one!
I can tell you care about her education very much and are very close to her ("因為有俾佢睇家計會出既性教育圖書" when she is only 4, which is very good though! If you are not closed to her, you would not do that because some parents might feel a bit embrassed if their children approah them with questions)
You are one very sweet family!