I knew even before we were married that my wife was super horny way more often than most other girls I had known. I met her in college and she had a bit of a reputation for fucking just about anyone lucky enough to be in the right place at the right time. She said she was faithful to me once we started dating, but I had my doubts. It excited me to think she might be fucking other people too. One thing led to another, and a year later we were planning our wedding. The night before the wedding I was staying in the basement bedroom of her parent's neighbor. I woke up around eleven when I heard a noise like someone walking into the room. I turned on the bedside light and saw my soon to be mother-in-law standing there in a robe. I asked her if something was wrong. She said the only thing wrong was that I hadn't had a proper bachelor party. I assured her that I didn't need one. Then she shocked me by saying that every man deserves a final fuck from someone other than the woman he is going to marry. I couldn't even speak. She opened the robe and let it drop to the floor. She was naked and beautiful. She was exactly what my wife would be in the same number of later years. She asked me if I liked it. I said of course I did, but I couldn't DO anything with my mother-in-law. She asked why not. I told her I was trying to be faithful. She said that wouldn't do at all if I was going to be married to her daughter. She said that she and her daughter were addicted to sexual diversity and adventure. I asked what that meant. She said they fucked anyone with a cock or pussy they could get to agree. She walked right over to the edge of the bed and said that her daughter was likely already fucking since she was already getting licked when she left the house to come and offer herself to me. On one hand I couldn't believe it. On the other my already hard cock stiffened like iron. I asked who was having sex with her, and she said her daughter was being serviced by her dad and her two brothers. He mouth was on my cock before I knew it, and I was past complaining. I came a few minutes later and she swalloed it. She stroked my cock as she smiled at me and asked if it turned me on to know that my wife was having such dirty sex. I just nodded as my cock hardened again. She got on the bed and sank down onto me. As she rode me she explained how their family worked. They were an openly sexual family. They often walked around nude and were allowed to touch and or kiss any part of each other. None of the kids were allowed to actually fuck until they were 16. My wife's 16th birthday was when she did her dad for the first time. Then her older brother got to do her when he turned 16. He was then 19 and the youngest brother had just turned 16 and was going to get to spear her for the first time. I came again. I screwed my mother-in-law for half the night. I woke up the next morning and got dressed for the wedding. My wife's brother drove me to the church. I couldn't help thinking what he had done to his sister just the night before. As I was standing at the front of the church waiting, there was a delay. After a while she walked down the isle and we were married. We were driving away on our honeymoon and talked about the wedding. I asked what the delay had been, and she hesitated before telling me that her dad wanted a fuck before walking her down the isle. I could see her watching me to see if I was having a mad reaction. I didn't flinch, but I wanted to. She promised me that now that we were married she was done messing around. I pulled over into a rest area and pulled in a spot at the end of the row where no one else was parked. She asked me what I was doing. In response I pulled out my cock and grabbed the back of her neck and urged her down. She sucked until she swallowed my cum. She sat up and smiled at me. I told her to get in the back seat, take off her dress, and finger her pussy until it was really wet. She climbed over the seat right away as she said it already was wet. After she had take her dress off and was naked I told her to get started and I would be right back. I got out of the car and strolled around a bit. I found a guy hanging out in a grassy area stretching his arms over his head. I asked if he had been driving long. He said about four hours. I asked if he was by himself. He was. I told him I had a problem I needed help with. He asked what, so I told him I had been recently married and was driving to my honeymoon. I told him my wife had sucked me dry and was now horny. I walked over to the car and opened the back door to see my wife openly diplayed. The guy looked in and his mouth fell open. I closed the door behind him as he climbed in the back seat. I got in the front and turned around to watch him stick his cock into her. Twenty minutes later he got out and went to the restroom. I drove on as my wife got dressed and got back up front. I told her we should establish intentions. I told her I intended to stay mostly faithful to her. I told her the only other woman I would do was her mother. She smiled. I told her that I expected her to keep having sex with her family if I could watch it. I told her I may even ask her to have sex with guys like I did at the rest area. I said that beyond that she was free to have what sex she wanted as long as she told me about it. She happily agreed. That was fifteen years ago.