Before she got married we had a lot of time to experiment with each other and I know my sister loves to take it deep in her ass. She told me once she tried to tell it to her husband but she doesn't have the courage to do it. She prefers I do it to her, she thinks that her husband might considered her a whore or a slut if he knows. He's religious and conservative guy. So when he's not at home I get a call from my sister asking if we could meet.