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Blackmail backfires - my step-brother didn't cover for me to go to a party, so I am pissed. I am revengeful, so I want to make him regret his choice. I burst into his room, threaten him to tell my parents I caught him jerking off, his door was open and I saw everything. He starts laughing at me, telling me his side of the same story: he was jerking off to MY porn! I try to tell him that it wasn't me, he must have fantasized or dreamt of me. But we both know that's a lie... it is my porn! Guess who's blackmailed now! I am afraid he will tell my parents about this, so I must do what he wants now... to cum on my tits! what difference does it make now since he knows my secret?