You and your wife invite her sister Anna to stay. You don't really know her that well, but you find yourself confiding in her telling her all about how you and your wife cant get pregnant. Anna doesn't like her sister much, she is jealous and thinks her sister is not grateful for her life. You blink and you find yourself having a frantic quickie in the kitchen. You make an excuse, cant believe whats happened and go to bed. A few hours later, Anna comes into your room, she is wearing your wife's underwear and perfume and wants more, she wants you too breed her. You cant say no, she is perfect, you picked the wrong sister.