Regret Pt 1

I have been with wife for 8 years. We are the same age , we went to school together. We knew we would get married. We were both kind of athletic. But full time jobs caused us both to gain weight. We always had a good sex life. We had discussed a lot of things including threesome and couple swaps. We had been each other first and onlys so far. I met girl at work. She was flirtatious with everyone. I heard that she was easy. One day at work I had been flirting with her All day. She eventually offered to give me a blow job. She was amazing at it. I cum so fast. This went of wea week. One day I offer to give her a ride home. We ended up having sex.
I thought I was in the clear. While vacuuming the SUV out my wife found a piece of the condom wrapper. She came in and asked me. I admitted to it. Instead of being upset she started asking me questions about how it felt To have gotten blow job and sex from her. She was getting excited hearing me talk about the other girl. We great sex while she begged for details. The next day my wife surprised me at work. I introduced them. They started talking and laughing it was like then knew each other forever.
They became fast friends.. my wife made dinner plans. We were in shock when she walked in with her husband. During dinner we realized he didn't know about his wife's indiscretions. After dinner my wife and her seemed to bond.
My wife started going to the gym with that girl they stay friends even after she quit her job. My wife lost a little weight she was looking amazing to celebrate I offer to take her dinner. We went. And she felt like dancing we went to a bar. My was dancing up a story. She was looking amazing in her strapless dress, she was in pantyhose and heels. I noticed not only men but even a lot of women staring. When she came back to the table I told her what I saw she didn't believe me. The night was still easy. Without telling me she texted her friend. When she go there I was surprised. My wife was happy tho. They both started dancing. After a few drinks. There dancing really touchy she had her hand on my wife hips and ass. I thought it was hot.
When the guys starting dancing with them I thought it was hot. A group of guys surrounded the two girls who were dancing sexy. I saw them getting handsy with the guys but I wasn't jealous. When the girls came back each sat on one side of me. I put my arms around them. It felt amazing. Everyone walked by looking. See me with two hot girls. We eventually went home and had our first FmF threesome. We have done it a lot after and she is one of our go too's.
After meeting that girl my wifes confidence peaked she was still going to the gym. And was looking as good as ever. One day she came home late from the gym. I didn't think anything of it. When it happened another time I still didn't think any of it. It wasn't until we were having sex. I noticed she had bruises on the inside of her thighs. She admitted that she had had sex with her trainer, she started to describe it. I was turned on it was good sex.
My wife asked her trainer and he didn't even want dinner he was cool with just sex, my wife was excited about it. The day came. The guy came over. He was shorter than me but you can tell he was muscular. He had just came from a private session. He seemed cool we drank a little. He pulled out some weed. We all decided to smoke. It had been a few years since me or my wife smoked. After a few tokes we were giggling. He sat there watching us. He asked my wife if she was doing her exercises at work she said ya. She told him she was still having problems with one. She got up and demonstrate. He got up and corrected her technique. I saw his hand on her thigh when she bend he was explaining what muscle groups were affected. His hands showing and touching