- The witch fixed her own happy ever after. All sorts of possibilities there for expanding the story. Could be straight fairytale or a spoof.
- The fairy godmother got her freedom back and walked away from her petulant client. Said petulant client can count themselves lucky they weren't transformed into something horrible. Could look at why client was petulant and what particularly made the fairy godmother decide she'd had enough.
- The second glass slipper smashed as it hit the wall. Who threw it? Why?
All of these could be flash fiction pieces or standard length short stories.