It's always the little things that stick in my side like a hefty thorn. Her mouth is wrong, and it's driving me nuts. It just doesn't seem to fit, and I've tried several angles to no avail. Shading isn't done or anything, but before I attempted more and potentially fried even more brain cells, I figured I'd ask for some help.
Also, does she look a little childish? By that I mean younger. She's supposed to be an adult.
Doesn't look too childish to me. I think your problem with the mouth (which looks okay, imho) is that the chin is kind of far back in her face, if you know what I mean, which would make the mouth look weird however you tried to move it... Hope that helps!