I finally have some alone time and I open up my dressing gown, rubbing my pregnant belly. I can't belive that I've managed to keep this a secret for so long. You burst into my room unannounced.... omg... StpBrother?! I try to hide my pregnant tummy but it's too late, you've already seen it. I beg you to keep my secret, I don't want anyone else to find out and you agree that you will do but only on one condition. Hesitantly I ask what your condition is and you say that you won't tell anyone else that I'm pregnant if I agree to fuck you. Ewwwww.... you're my StpBrother?! At first I'm really shocked, but I decide that it's worth it if it means that no one else finds out. I give you a blowjob, grossed out at first but then I soon become horny. I didn't realise but me keeping my pregnancy a secret also meant that it's been a while since I've been with a guy and I really missed it. We begin to fuck and I can't believe how good it feels, especially since my pussy is so tight and swollen. I moan so loud and want yo to fuck me in all different positions. Eventually you creampie me, since I'm already pregnant you think that it doesn't matter. I can't believe that we just did that StpBrother...