Today Fat Woman looked in a mirror and could, just for a moment,see what her body might be like if she wasn't so fat.
This is a revelation for Fat Woman who has never seen any possibility that she has a "normal" body shape underneath her fat. Fat Woman assumed that if she lost all her fat she would be solid, like a piece of furniture. When Fat Woman had all her fat it was impossible to imagine herself being anything other than what she was. Yet now Fat Woman has lost more weight the fat she has remaining seems somehow less permanent, less part of her. Fat Woman can glimpse what her body would be like without the weight she has always had.
Fat Woman is treasuring the moment where something became a possibility for her.