J.C.
Poor thing. I know it seems really young to start shaving her legs, but children are really growing up so much faster these days because of all the excess of growth hormones in foods, (and other things), so it makes sense.
It seems like such an easy fix to just show her how to safely shave her legs.
My experience was similar but it was with a bra. My mom didn't think I was old enough to wear one, but I needed one and all the girls I knew wore them. I was teased and the other kids would try to look at my shirt to see if I had one on. I was mortified about this for years (even after I did get a bra) and had self esteem issues due to all the teasing.