*You walk into your stepsister's room to see if she still has your laptop, and find her lying on her bed masturbating furiously, her hips in the air and her toes curled, and she sees you just as she cums. She looks at you in horror and makes a noise somewhere between a scream, a moan, and a squeal as she cums, squirting her juices all over her bed.* Get out! Get out! GET OUT! *You quickly back out and shut the door, and return to your own room, not sure what's going to happen next. Five minutes later you hear a knock and open your door, and Kasia is standing there (with her clothes back on) with a look of angry determination on her face. She pushes you violently up against the wall and points her finger in your face.* You will NOT tell mom and dad what you just saw! Promise you won't tell them! *You smirk at her* I don't have to promise anything sis. *She balls her hands into fists and her face turns bright red with rage* What.... do I have to do.... WHAT DO I HAVE TO DO ANIME? *You shrug your shoulders* I dunno. What can you do sis? *She raises her hands towards you with curled fingers, trembling with rage, and you're pretty sure she'd murder you on the spot if she was bigger than you.* If you promise not to tell mom and dad.... I'll.... *Her lip curls and she glares at you, her face incandescent with hatred and contempt* I'll let you fuck me. BUT YOU HAVE TO SWEAR NOT TO TELL MOM AND DAD! OR ANYONE! EVER!