Again, same process. Select an area with the Lasso Tool, feathered to 1 -2 px. Select an almost white color, Brush Tool set to Normal, Opacity around 30 % and gradually build up the white area until you’re satisfied that it looks right (see c16).
Like the right side of her face, the right of her torso is darker, so same process but the Brush Tool is set once more to Darken. Build up the color following the shape of her breast and the middle of her chest.
Add shadows by selecting an area and using Gradient tool with a dark shade color. Build it up again until it matches the rest of her body.
Eventually, by repeating and experimenting on the various ways of adding shadows and light, I end up with this final product.