He's Her Sister

He's Her Sister is an erotic story about twin brother and sister John and Joan. The two looked very similar, with John being a little more feminine and Joan being a little more masculine. Joan played a lot of tennis but one day she was unable to attend a match and she asked John to step in for her. He was feminized and turned into a transvestite in order to be able to fake his way into getting the referees to believe that he was his sister. The story gets more interesting as the ruse progresses.