Brilliant work, especially with the wings- rather than drawing every feather, you sketch them in and let us see them for ourselves. Brilliant.
Two minor problems that I can see:
(1) The cant/angle of her hip is somewhat more horizontal than I believe is the norm; and (2) While this one is more about taste and artistic desire, I think the piece would be improved by a background. Some abstract pattern, probably - done in violets, reds and black.