Me my first wife and her younger s****r SeXStoRY

When I started to court my wife she was nineteen and I was twenty one I got really friendly with her younger s****r who was only fifteen and very very sexy.There parents had a big farm and they would ask me to help feed the sheep and cattle the younger s****r would say to her older s****r if you want you can stay here and I will go with James and help him. My girlfriend then was not a lover of the farm so she would always say yes you go. Well the younger s****r being so hot and sexy would be all over me and when we got into the barn she would have her clothes off and ready to fuck we would fuck for 15 minutes or so and I would not cum she would get her clothes on all but her panties she would put them into my pocket so that I could finger her as we went between paddock.stopping for a few minutes at every gate that we had to open on the way so she could give my cock a suck and i could tickle her aroused clitoris and finally we would get each other off finish the feeding and go back home.When we got married she would come and stay with us some weekends and one weekend there was a bad thunderstorm and she hated thunder so her s****r said to come and sl**p with us in our king size bed well that was a big mistake as my wife got horny and started to play with my cock then she got on top of me with her s****r on the other side of me still wide awake and making out she was asl**p I knew she was awake because I had just taken my finger out of her wet pussy. Then the shock came my wife said to her s****r do you want a turn she new that her s****r was always so horny and that was the start of some great threesomes and that was when i found out my wife was bisexual and so was her s****r