drawing a lot of attention, which may have to do with the warm yellow colors used in that area of the painting. this may also be the reason you feel the breast on the right is reading as negative space, since the warmer colors of the arm near it would give it the appearance of being further back and perhaps flatter. going over the arm with some cooler colors, like those in the rest of the image, might help in keeping the viewers eye from straying so much to that area, while adding just a bit more yellow to the right breast may bring it more into perspective.
there may be 