Here I was fucking my nineteen-year-old sister-in-law, Mandy, while my wife slept. How could I do this? Yes, she was hot and she had been coming on to me for a year now. How did this little Mormon girl seduce me? I have been married for years to her sister, Mandy was eleven when I first met her. She was always the pretty one, the one who always got her way. She lived with her mom most of her life, a strict Mormon who kept...