I hate to sound like a pervert BUT I actually had a treesome with a mother and daughter a few years ago. I was single and the daughter worked for me. She was married but she was determined that she was going to get me in bed. I promise this is true and not a fantasy or ego talking. Anyway one night she and her mother came by my house and they started making advances to me. It turned me on so much to have a mother and daughter at the same time. I am married now and I could never think of my mother-in-law and me together but many guys have the fantasy of a mother and daughter even if they will not admit it. I hope thinks workout for you and your husband. Remember that fantasy is fantasy and most people never act on their fantasys.