The last in the series! It's my birthday. You surprise me by getting everyone else out of the house for the whole weekend. That means we have the house to ourselves and we can do whatever we want! And we want to do dirty stuff, of course. I give you a striptease then get down on my knees to suck your cock. Right before you're about to cum, I stop and tell you that you have to make me cum first. It is my birthday, after all! I lay back on the bed and you lick my pussy until I cum and squirt in your mouth. I flip over into doggy so we can fuck. But you have to put on a condom, big step-brother! What do you mean you don't want to? You have to or I might get pregnant. You don't care? Well ... I do want to know what it feels like to fuck raw. Okay, but don't cum in me! You start fucking me hard in doggy. I get so turned on that we switch positions so I can straddle you and ride you hard. I don't care if you cum in me, I don't care if I get pregnant! In fact I want you to cum in me! Make me pregnant, big step-brother! I ride you until you cum in me. I collapse on the bed, exhausted. What did you say when you came in me, big step-brother? Did you say MARRY YOU? Oh my god, yes I'll marry you! I'll be your wife and get pregnant over and over again, big step-brother. I love you, too!