Not only are Sheyla Hershey's breasts fake, but that picture is Photoshopped. Though the picture within the picture is real. Also, that woman just has severe issues and some kind of inferiority complex.
Anyway, about the witch I can admit the art style kind of draws attention to them in an odd way. Almost like they used to belong to a fat person, but got slapped onto her somehow.
Also, her ass is just in the foreground. It's not really that huge. --- This is my super "secret" board. Come on in here. http://www.gamefaqs.com/boards/gentopic.php?board=565572