I always take responsibility for my actions

I've always been a little arrogant, well off financially due to family wealth and good at sports. At college in my second year a shy freshman caught my eye, she became my prime interest, and I succeeded in dating and bedding her, made a mistake using an ultra-thin condom which broke as I was Cumming. She would get pregnant, like me she came from a wealthy family. I took full responsibility for her getting pregnant and we married. Her mother was cold towards me I thought, I put it down to me getting her only daughter and (youngest of 4) pregnant outside of marriage. But I was quite happy being married, as I realized it was better than dating. I'd a willing to please wife and no hassles of the dating scene. We spent our breaks from college with either set of parents. My wife's father seemed happy with our marriage, he was 7 years older than his wife. Turns out he had gone of sex preferring to play golf. My mother-in-law seemed to busy herself with her image as a socialite. But I was later to find out she lived sex a great deal and coped with the absence of sex with her husband focusing on her social standing. With the coming birth of our son, her mother decided to assist her daughter by living with us in our apartment off campus to watch over her grandson while we attended college. On his birth with my wife still in hospital, I celebrated a little too hard with my mother-in-law. We got on very well and ended up fucking several times. I thought it was the alcohol that got her horny, but it just unlocked the door holding her desires in check. Once released she wanted more sex from me, every time my wife was at college, and I wasn't she straight out asked me to me to fuck her. I always do, then after her mother birthday my wife asked to fuck her mother. Put up to it by her mother, who wasn't satisfied with irregular sex she was getting from me. Unknown to my wife that I was already fucking her mother, she decided to do as her mother asked her too. So, me being me said OKAY if we had a threesome, my wife agreed. Outcome no hiding my sexual relationship with my mother-in-law anymore.