Obsessive Sister Makes You Cheat

Your sister is over hanging out for the day. While your wife leaves the room for a second she immediately starts at you. "Do you miss me? Do you miss us? We both know your marriage is just a cover up.. you're obsessed with me. Obsessed with your sister... Obsessed with ince-" She teases you about when it all first star. She caught you jerking off to pictures of her on the family desktop. You're getting harder and harder and can't believe you're about to give in. She convinces you to fuck her right then and there in the kitchen. She's being loud.. probably on purpose because she knows your wife is in the other room. She tells you the only way to shut her up is to fill her up! Your wife is coming back in the room any second so you give her a load that was years in the making. She tells you she wants to be fucked for real and to make your wife leave... send her to the store or something... You do! Your wife's gone and your sister is on your bed, hair up, butt naked, ready to go.