Your step-sis caught you masturbating with her panties. You perv! Now you belong to her, you are her slave and must obey her. You must do everythink she wants or she'll tell everyone what you did. She knows that you don't want to be exposed for being a freak and she's gonna take advantage of her positition of power. She's cruel and makes you do nasty gross things just because she can.

Your step-sis caught you masturbating with her panties. You perv! Now you belong to her, you are her slave and must obey her. You must do everythink she wants or she'll tell everyone what you did. She knows that you don't want to be exposed for being a freak and she's gonna take advantage of her positition of power. She's cruel and makes you do nasty gross things just because she can.