"Cinderella" by Seafire. There are several approaches one could take to writing a version of "Cinderella with an attitude." For example, consider the following dialogue:

"I can't have sex with you. My stepmother says I can't have sex until both of my stepsisters are married."

"Fuck your stepmother! Fuck your stepsisters! I want to make love to you tonight."

And so they fucked her stepmother and fucked her stepsisters and then made love to each other and lived happily ever after.

Or maybe this one:

"What ELSE can you do with a glass slipper!?"

But the present story takes a more conservative approach. Since she is their slave anyway, the stepsisters decide to put her to a more practical use than merely doing the dishes and scrubbing the floors; they make her Cinderella into their sextoy. The twin bitches pierce Cinderella's pert little nipples and her inner labia and insert horseshoe rings and other adornments. They also make her wear a butt plug all the time; and they make her do all manner of lewd things to them. Being an obedient and resourceful girl (also known as a good victim), Cinderella comes to love what they do to her. She even learns to use her anal sphincter to milk her butt plug in and out until she can make herself orgasm. The stepmother, of course, joined in the festivities, often dressed in her bright red body suit, and occasionally urinating on Cinderella during her obscene activities.

As you may have suspected, the Prince, who is famous for his balls, holds a Great Party, to which the stepmother and stepsisters are invited, while Cinderella is scheduled to stay home and scrub floors and masturbate. Of course, the fairy godmother comes, dresses Cinderella up, is so overcome by the young girl's beauty that she gives her a tongue job; which causes Cinderella to come for the first time that evening. As a final touch she changes the mundane, ordinary butt plug into a beautiful crystal plug with a scarlet plume. This is not to be confused with Papa Petrofile's Purple Pucker Plug . . . Patent Pending, which is a completely different story.

When Cinderella arrives at the ball, she is fit to fuck, because the coachman has been cracking the whip all the way, and that has really turned her on. Actually, I added that part.

Anyway, Cinderella becomes so engrossed with the Prince's cock that she ignores the clock; and midnight comes shortly after she does, and so she has to go rather abruptly. I won't ruin the ending for you. Suffice it to say that it is not a glass slipper that all the maidens of the land try on in order to establish their claim on the Prince and his balls .

Did you ever wonder what Cinderella's father was doing during this fairy tale? That question continues to go mostly unanswered. In spite of that omission, this was a most enjoyable story.