My wife and I had been married for about two years when my wife's brother married Beth. In June of that next year, my wife went to visit her sister in Washington. I was home late one evening when my sister-in-law called me and told me she wanted me to do something for her. As she was a hottie, I agreed not knowing what she wanted. She told me to put on a pair of my wife's silk panties and call her back. I went to my wife's dresser and got out a pink pair. I called Beth back when I had them on. She told me to tell her what color they were and I answered, “Pink.” She laughed and said that I was to pleasure myself while talking to her. She told me that my new name would be Sally and that I would tell her what I was doing every minute as we talked. I complied and when I was ready, she told me to stop and get in the car and come to her house. I was to only wear pants, a tee shirt, and the pink panties. When I got there, I was told to strip and she then told me I was pretty in pink. She told me a lot of things to do. I did them all, and then she let me get dressed and go home. We have done this several times when my wife is away for a week or so. She has turned me into her sissy slave.