This is really great, especially for something drawn with a mouse. :) At first glance, I was very sure you'd used a tablet.

The foreshortening here is good, as it emphasizes the nice and natural pose. The lineart is real nice, especially on the folds of the clothes.

I think that the highlights you used were a bit too bright, though, since denim and cloth don't reflect that much. Her right hand also looks a bit awkward. Aside from that, coloring's great. ^^

-Delta-