When a guy cums into a high-heel and then has a girl drink the cum out of the high-heel. If you use a glass high-heel (if they even have those) or a see-through high-heel then you've done the ideal Dirty Cinderella.
"That girl Sandy is such a nasty bitch, you won't believe what she let me do last night."
"What did you do with her this time?"
"She let me give her a Dirty Cinderella!, she drank every last drop of my cum out of her high-heel."