Starting a family again

I'm 36 married with 2 children and my wife says that's enough children as she wants to progress her career. I was okay with it at first but wanted a child or 2 more after while of thinking about it. But I couldn't with my wife who had the operation to stop her having any more children. It was her decision not mine; I do love my wife and otherwise we get on very well. It was no use bring up my change of heart over having more children, as she had already had the operation before I changed my mind. But things have a way of sorting out problems. A single woman 39 who works with me, had put her career first and had decided the time was right to start a family. She didn't want a husband just sperm to get pregnant and had investigated IVF and found it wanting her words. She liked me as the family man in the office and over a bit of time we talked and her desire to have a child came to my notice and my desire to have more children to her notice. Short story we started fucking to get her pregnant and after several goes, she got pregnant. She had her first child and soon decided to have a sibling as soon as possible and I fucked her again and she again got pregnant having our second child. Like my wife she decided 2 was enough. She bought the house next to me and my wife and she has become a good friend to my wife. Also started a sexual relationship with my wife and joining us in threesomes regularly since. My wife does know who the father of her friend's children is and accepts it as it is a mutual benefit to the 2 of us. As she doesn't want any support from me and my wife and her are lovers. But there was one change, we decided to buy a bigger house and all live together and that was in 2019 and we are all still happy.