I'm not really a big fan of anthro but this piece is stunning. I love the color pallete you used and the lighting. Like my art teacher used to say, the best art has the lightest lights and the darkest darks.
Shirts stretched over breasts wouldn't follow the curve so precisely back under to their sternums like that unless it was cut specifically to fit them that way - the fabric should be convex from the widest part of the breasts at least down to the lower ribs/waist.
a quite good piece, I'm no expert on anatomy but I keep thinking the legs are a tad long...and I have to agree that the facial expressions, while each works on it's own, don't work well together, and kinda take away from the piece as a whole