shoe and marriage

I was looking over shoe and marriage for my paper and I was just wondering if his wife is the "Cinderella" or is it the girl. We know his wife does not fit the shoe. He keeps saying he loves her but her feet are too big but he girl does. But the story doesn't say that either the girl or his wife is the girl from the dance. Does anyone have any ideas about this story as to which is the real "Cinderella"?