When we met

When my wife told me after a fun night out and her having a bit to drink, that when we first met and until she moved out my way, that She was having sex with her landlord and me on the same day many different time's.
We have always had a good sex life. But I did not know her's was even better when we started dating. She was living in a studio apartment of a friend and coworker, but after a few months her friend and husband were going through some bad time's and her friend moved across the street to her mother in laws house. My wife said she asked if she should move out, but said no, we just need some space and will work it out.
After a short time and my wife going out once in a while on a date, she had come home from work one night and saw her friend's husband out working on the car and they talked a little, she mentioned that she was just going to stay in and watch a movie. And asked if he wanted to watch with her.
From that night on, or when it was in the interest of either one of them they had sex. She told me both did not want to screw up his marriage, but if they had the time and felt the need then, what the hell.
She told me this many years after we had been married and that it went on until she moved out my way. And the kicker was that many time's after us enjoying a great day and at least I thought great sex, she would go home and late only to have sex with her friend and coworker's husband.
I could so I did, Know one was hurt and at that time I needed it