I think it’s a perspective you wouldn’t see unless maybe you closed one eye and put your head down by her foot. Also, I think it depends on what your want your art to look like. Sometimes in comics they draw a fist bigger than the rest of the body to make it come out of the page so they are distorting on purpose. Usually in figure drawing you don’t want a giant foot though.

Your drawings are nice, but they are missing the design of the pose. You have added so much information on the contour, that you cannot feel the stretch and the pinch of the pose. I did some quick sketches to show you what I mean :)