Speedball said: the heels should not be towards you(in this pose, looking at her back) unless you can completely twist your foot around
I dont think she has heels towards the "camera". Its just poorly done shading. And I believe that if her feet are really turned like that, she whould have more details on the pantyhose around the toes. So yeah, prolly just poorly made shadings. I dont see kantoku making this big mistake.