Cindrella Disciplines her Stepsisters (F/f/f PI BDSM)

Cinderella's returned home so that her naughty stepsisters can prove that they deserve not to be put to death. Can they please Cinderella sufficiently, or will their heads be on the chopping block? WARNING: This 18+ story features PI, BDSM, spanking, a riding crop, dirty talk, a glass dildo, and more. ADULTS ONLY.
EXCERPT: She craned her neck up and allowed her lips to graze Cinderella’s flushed outer lips. She parted the princess’s labia with the tip of her tongue and found her swollen nub. She teased it gently, sucking the hood and licking at the sensitive flesh around it before finally pressing her tongue to it. Mina moved her tongue slowly back and forth, flicking the tender mound of flesh.

Cinderella moaned in agony, breathing heavily from the sensation of her two stepsisters pleasuring her. As time went on they became more and more bold: Marlena’s teeth grazed her nipples and nibbled the surrounding skin, while Mina had slid a slender finger into Cinderella’s tight sex and was now curling it rapidly while she eagerly licked her nub.