As she's getting ready to go to the club, your goth step-sister finds you peeping through the door as she gets dressed. She sits you down and gives you the conditions of her blackmail to you: fuck her like your life depends on it, or everyone finds out about your nasty little habit. She teases you with her body before stuffing her warm panties into your mouth, letting you taste and smell her scent more fully. She lays down, getting you to fuck her exactly how she wants and you'd better not stop, or else. You're going to have her cumming all over your dick before blowing your load, all the while still bullying and verbally degrading you.