I was 13 when I started to wear makeup so to know that 20 years later girls want to wear it at 12 seems much more realistic than I would expect. I don't think you are unreasonable to ask her not to wear it, though, either. Sounds like you've gotten lots of good advice - a compromise of light lip gloss and neutral toned eyeshadow and mascara but not the whole enchilada seems like a good plan. Best of luck to you! Congrats on having a wonderful daughter who is willing to talk to you about it!