Your sister Anna unexpectedly turns up at your door. She says she has had a fight with her boyfriend but wont tell you why. She asks if she can stay over, she appears to be quite sad but you are happy to see her, you two have always been close. People comment on how close you are. You run her a bath and take her glass of her favourite red in. She tells you to sit on the toilet and chat to her. She wants company. But you cant stop staring at her tits. She comes out the bath, dressed in one of your tshirts, you can see her ass and your cock starts to stir. How embarassing. She switches the TV on and Omg you forgot you were airplaying sibling porn on the tv before she turned up. She teases you for it, but she's cool, she doesn't make a big deal about it. She drifts off on your lap watching a film, she is sexy .. Her hands moves and starts rubbing your shorts, slowly, not right on your cock, but heading that way, you cough and she wakes. Apologies, and says she going to bed. That night she sneaks into your room, climbs into bed and starts rubbing her curves all over you. She asks you to take your cock out, without saying alot to eachother you engage in the most intense midnight oral you have ever had. The next morning you find her naked in the kitchen, She asks how you feel and you start to make an excuse how it shouldn't happen agai....she cuts you off and asks why. Why shouldn't she get to fuck the guy she loves most in the world? She bends over, pulling her thong to one side and tells you to pump your cock deep inside her. Back in the bedroom, you fuck her slow, hard, fast, gentle every way she wants it and its never felt better for you. She tells you you might as well cum inside her, the risks you guys are taking anyway is enough. She rides you cock until you fill her up. She then tells you to eat her pussy until she is squirting all over your face. You don't know what is next for you and your sister, but you know that your guys are closer than close. You're inside each other now.