Precocious Puberty Support Group
Early pubic hair, breast, or genital development may result from normal but early maturation or from several abnormal conditions. Early puberty which is normal in every way except age is termed idiopathic central precocious puberty. It may be partial or transient. If your child is going through early puberty, share your experiences here and get support.
Yes, throwing a fit is normal for that age. But this is different. We (you and me and the parents) know the difference. You can tell it is different.
I think what you are doing is the best you can at this point in time. Maybe as she gets older you can start talking about it and allowing it less. But right now, they are simply too young to understand.