I was one of the early bloomers too, period at 10, make up outside the house by 11 or 12. I have two grandmas who I am very close with, but not like before. When I was younger I was perfectly content sleeping over grandmas and being away from friends. I think it must have been around junior high or high school when it began to feel like I was "missing something exciting" when I stayed at my grandmothers rather than going out with friends. Now I am 20 and I'm at a very different place in my life than when I was 16 or 17. Living with my fiance has made me think about my own grandparents relationships and I guess I see them in a different light. Even when I was 16 I saw them as people who I loved dearly but as people who didn't understand certain things about my current life, but as I've become more of an adult, I think I see some "universal" issues on which I can use their experience and advise.
That was long lol, bottom line.. I think it is perfectly normal but I can totally understand your feelings. If I could offer you any advise it would be to try and stay current. If you feel her makeup is inappropriate, leave that up to her parents. It would be great if you could somehow let her know that you were a teenager too and dealt with many of the same issues with boys and friends etc. It may help her to see that she can go to YOU for advise because you understand her life.
Good luck
