THE TIME FRAME IS THE 1980s to the present
This was maybe 40 years ago. In high school while on the bus I would look for my girlfriends big sister - Mary, riding in a car with her husband - Larry going to work. She was always snuggled next to him. Then one morning she was not setting next to him. I figured they had a fight. A couple of days later Larry was driving and Mary was sitting in the back seat next to a man. I was confused. A couple of years later I am married and Mary is now my sister in-law. We would visit her and her husband and sometimes a man named - David was their. He was older and very nice. He flirted with my wife - Janet. My wife loved a older man was flirting with her. Her sister - Mary would get mad but not say anything. Her husband Larry would laugh and suggest David take both sisters home with him or into the bedroom. We thought Larry was joking. David would hug Janet and Mary together and give each one a kiss. Tell them both they could make his desires come true. My wife never did anything with him and told me something did not feel right. Her sister would call and ask my wife if she wanted to go on David's boat for the weekend. The husband's can stay home. My wife would say no. I would try to get my wife to go. Her sister admitted to my wife David was her lover and Larry loved to hear about her fucking. Sometimes Larry even watches. Mary said David wanted the two sister's to date.
Mary said it would add spice to our marriage. She said my wife should tease me about how hot David was and he must be a better man who can handle two sister's. (My wife now says she wished she had dated him.)
My wife said no. My wife found out David was married and ask her sister, Mary how she could date a married man? Mary said she will take him anyway she can. She is devoted to him.
Mary and Larry had a little girl. David and his wife had a boy the same year.
Over the years Mary moved into Davids home with his wife. Larry, her husband was heart broken. Then she moved back in with her husband. A year later David moved in with her sister and husband. David was showing his wife, she needed to except him as he was.
His wife asked him to come home after a few months. Her sister was very up set when he went back to his wife. David's wife would call Mary setting up dates for her husband like weekend's on his boat. She would even call for her to come over because he wanted her. Mary would act like a teenage girl and run over to his house.
My wife would tell her, her husband was asking her to stop and one day he will leave her. She told her sister he was just using her for sex only. Her sister would do anything for him. She did threesomes, even six guys for him. She was still begging my wife to make David happy by giving him two sisters to play with.
Her husband Larry left when he found out Mary and taken their daughter to be lovers with his son. The four of them were on the boat and David and Mary talked to them about sex and how much fun it is to belong to someone. David undressed Mary to show the new young couple how to start. David told them to have fun, you do not have to be in love. It can be pure sex. David said he loved his wife but he needed someone that would obey. He told his son he could have Mary's daughter as his own. My wife told me all about this. It came out during the divorce. Years later Her sister Mary is now by herself. She never dated anyone because she refused to leave David, even though he stopped seeing her. She is 70 and has been alone for over 20 years.
Her husband moved to another state with his daughters. He is remarried and is happy.