Her neck is wrong because it’s broken. Since her head is closer to us in perspective than her body, if anything, it should be forced down and to the left of the page (note the perspective of the wall top). I drew two lines to show you how far out of alignment her head is.
It isn’t that way because of “porn”. It’s that way to cover up a mistake on the left arm. He didn’t bother to redraw them. Take a better look at it. See the place I have circled? The arm doesn’t even exist because the artist “faked” it in with a little color and a lot of hair. At that perspective, her yellow glove should end before the hair falling on it. He just didn’t want to have to draw that arm - which wasn’t drawn from a “porn” because it isn’t representing the position you think it is. Her body is at a simple slant, and she (like most comic book chicks) is herself rounded.
One more error. The right back leg I have circled. I did it because at that angle, that foot should be dangling in space! Her left leg is forward, and her spine bent. That right leg is knee to the edge. So she should barely be able to crouch her hindquarters in that fashion at all. She’s too unstable. I really doubt he was heavily focusing on a photo for this one.
