I go to my class and sit with my friend and tell her about the guy I fucked at last night's party. I almost got caught staying out all night. I'm too busy with school, having fun, and being an absolute slut to even think about getting a job, or moving out. Some might call me a mooch, others might call me spoiled. I'm the princess of the family. The guy I fucked last night walks into the class. I show my friend and she agrees he's cute in a dorky way. I make fun of him for staring and joke about possibly fucking him in exchange for him to do my homework. My friend asks to hang out later and I let her know I can after a formal family dinner. My dad is marrying another gold digging bimbo and for the 6th time, he thinks she's the one. I normally wouldn't care, only this time she has a son who is my age. So, he wants us to play up the perfect family act. Class is dismissed and I head home. I walk through the door and find the dude I fucked last night standing in my house. Is this fucking loser stalking me now? He fills me in that he is in fact my new step-brother. I'm immediately grossed out. No one can find out about this, especially my dad! I'll def lose all privileges and allowances. My step-brother heard what I said about him in class, and liked the homework idea. Disgusted, I tell him to fuck off and keep his mouth shut about everything. I go to my room to get ready for the dinner.  Later, my step-brother walks in, telling me he wants to watch me masturbate. He says it's hotter knowing that I'm his step-sister. He says he'll tell my dad everything if I don't do what he says. After a mini hissy fit, and berating him for being a loser. I give in. Just this once, though! I undress and start rubbing myself. He pulls his cock out and joins in. I try to act like I hate it, saying how wrong this is. But the pleasure is written all over me. I get more and more into it. He even pulls out his phone and records me. I eventually cum, and tell him that was it. He got his show and his little video for him to jack off to. But he tells me the real reason for the video. He plans on showing it to all of our peers, sending it to everyone I know, including my dad! No! My dad thinks I'm an innocent, good girl. He would cut me off completely if he knew what a slut I was! The only way I can avoid it is if I agree to be my step-brother's new fuck toy. We'll be living together after all. I reluctantly agree and tell him to get the fuck out of my room, so I can get ready for the family dinner. He wants to fuck right now, and he doesn't care if my dad might catch us. I do as I'm told and get fucked until my pussy is creamy. I'm a slut down to the core, so I beg for more, telling him I'm such a slut for my step-brother's cock. I'm the perfect slutty step-sister.