Below is the map of images I used as I worked:
Despite these being pretty basic outlines I think her shape is already improving. I looked at the images of anorexics and I also pulled one image of a thin model to see what shape the hips would make if someone was literally pulled upwards. I think her shape sits better now. She's still unnaturally thin and quite angular but it's a little more believable. The front view hips don't have any details so I'll work that out next but I think it's a big improvement!