We've always been close and never have had any secrets. Our rooms are right next to each other. And our parents are out of town. I know you've been eyeing me when I get out of the shower. And thanks to think walls, I plan my masturbation sessions for when I know you're jerking it. Why deny each other? We should fuck. I daydream about sucking your cock. Feeling it cum in my pussy and ass. I mean why not do it? If you turn me down tonight though, I'll just let everyone, including our parents know that you tried to come on to me. And they'll believe me too. I've always been the good one! And you..well, you're not. Once it gets out, everyone will shun you and your life will be ruined. Or we could just keep a secret between brother and sister and have a lot of fucking fun. What will it be? Judging by your swelling cock, I think I know the answer.