Sister Unknowingly Fucks Her Brother

I left the little town I grew up in long ago, but you know what, I really miss it. I decide to move back, not sure if I should tell my family since I might up and move again after I get bored. I was browsing Craigslist casual encounters when I saw, unmistakably, an ad from my little sister!!! Damn, I always knew my sister was a slut! Truth be told I've always wanted to fuck her too. This could be my chance. My appearance has changed as I've gotten older and everyone still thinks I'm all the way across the country. I respond to it and she invites me over! When I get to the door she looks at me a little funny but invites me in anyway. Then she admits I kind of remind her of her older brother. She has no idea that I AM her older brother! She tells me we should go back to her room and we get straight to fucking in doggy. Damn, this is even better than I imagined and the best part is she has no idea she's fucking her brother. Her pussy's so tight and wet. We move into missionary and I finish all over her huge tits. As I cum, I tell her, "Yeah sis! It's me, I'm back in town" She's completely shocked and she's completely pissed!!! I can't believe I just got to fuck my sister and cum all over her tits!!!