I'm pretty much a no make up girl too. Although I do like to throw on a skirt someitme, you know the long loose ones (Heavenly compared to some of my jeans!
). But my mother and to a very lesser extent, my sisters, are much more involved in what they wear and how they look. My mom's excuse is always that you get treated better if you dress better, but as far as I'm concerned that's just unfair and I don't want to play into that anyway. And then there's the fact that when I'm taking a walk or playing with the kids, that that excuse doesn't fit that anyway.
I do like to get dressed up on special occasions, but even then I usually put on blush and lipgloss. Anyway, I like the way my families draws drop when I actually take the time to get all dolled up, it just wouldn't be as much fun if I did it all the time!
And I also think that the more you wear makeup and get dressed up for everyday things, the more you feel like you have to do it, and the more you feel uncomfortable in your own skin. I don't have the time or desire to spend the time to do that stuff. I'd much rather spend it on a tickle fight with the boys, or a few extra minutes hiding in the bathroom to read a book!
So do what makes you feel right, and just feel sorry for your family that they can't see their own non-makeuped, non-dressed up value the way you do!