The only critique I have of this piece is concerning her right arm which does not look natural when it wraps around her tail. For instance, according to this image her right upper arm would be significantly longer than her left based on how it is wrapped around her tail. One thing that helps to achieve a greater degree of naturalism with this is the technique of drawing-through. This means you draw the right arm in its entirety first and then draw the tail being held in the arm. You then go back and erase the excess lines.