Finally In luck

At university I was the class nerd, not dating or in any relationship with a girl either. Well off due to family wealth and trust fund I lived off campus. In my last year I met a girl a year younger than me, and we hit it off. She was working to pay her way thru university, main reason I hadn't met her before. I was made tutor and put into an uplift program the university had for struggling students to assist students who needed help with their studies. That's how we first met, one thing led to another, and we became lovers. Of course, I got her pregnant, not planned but I was happy to have done it. To ease her concern over being pregnant I married her. She could stop working job to get by as I paid her way. After she graduated, we moved closer to my family, both getting jobs with my family's business. Her mother (widow) moved in with us and looked after our son after his birth. I celebrated his birth with my mother-in-law and ended up fucking her. Luckily, she was passed get pregnant as no precautions were taken. My wife knew something had happened by the way I looked, her mother blamed too much alcohol. But my wife just laughed and said go for it, adding it would sometime before we could start having sex again. So, we have had sex fairly regularly and when my wife was able, we had a threesome. We now have 3 children a boy and 2 girls one born last week, I'm still getting sex off my mother-in-law with the blessings of my wife. I'm a really lucky guy having such great wife and willing mother-in-law.