Six years ago my wife and I moved from an apartment into a house when my wife was pregnant. Our next door neighbor's wife was also pregnant and we became fast friends. After the babies were born my wife S and R were together all the time. We soon joined their club and during the summer I always joined them for dinner. My wife had a nice body and was able to lose the weight she put on quickly. R had trouble and just said to my wife she was destined to be a big mom. When we built a pool with some money my wife's grandparents left her we soon left the club. We always invited R over but she liked the club.
Last summer R decided to leave the club and started to come over to our pool. I saw that R lost a lot of weight and was now wearing a bikini. I thought she looked good and told her how she looked. Sometimes when my wife was alone she would sunbath topless or nude. We had high fences and only R on the side. I came home at lunch to get a report and went to my study and when I looked out the window R and my wife were sunbathing nude. I became hard and looked at R and saw she had a little hair and nice breasts. I was stunned and went to the bathroom and jerked off. I left without them knowing I was there.
A few weeks later my wife went to stay at her parents for a visit. I came home one afternoon and went to get my suit and saw R naked. I then stripped naked and went outside. When I got close to R I said 'Oh my god R what are you doing here'. R looks up and sees me naked and starts to cover up. I put my hands at my penis which is getting hard. R tells me my wife said she could come over since I would be at work. I tell R I left early today. R looks at my hard on and uncovers herself and ask if she did that. I tell her yes and she has an amazing body. I uncover myself and R says no wonder your wife is so happy. I look down and my penis is totally erect. R then opens her legs and starts to touch herself. I start to stroke my penis. In a few minutes I hear how wet R is and she starts moaning and soon has an orgasm. I stroke faster and faster and then shoot my cum on the ground. R says that was amazing and she needs to cool off. We both go into the water and R comes up to me and says she is still turned on. She then finds my dick and says so are you. R tells me she had her tubes tied and I laugh and say I have bean snipped. We start to kiss and the rest is history. It seems so weird that I am cheating on my wife but with R I am. After we both have orgasms R makes me promise we would never tell our spouses.
It never happened again and I never told her I would love to be able to have sex with her again.