Started at University

Starting at university I was going to live off campus, I'm prefer my own space. Well off due to trust fund and access to the family wealth. I bought a small house 3bedrooms 1bathroom fairly close to the university. The first few months no problems, I usually walked unless raining, drove my car if raining. No close friends I didn't try and neither did others, I'm a standoff type and don't interact much unless I really have too. One of the university staff then 36 and I became friendly, she made the effort, if left up to me we wouldn't have. Then one day I noticed she seemed a bit worried, so she must've been very worried for me to notice anything. So, I asked what's wrong and was told she had to find another rental as her current one was purchased for redevelopment. For some reason, I still don't know why I said I'd a 3bed house and if she needed, she could have one of my spare rooms. She didn't know I owned a house I hadn't said and so after lectures that day she came and saw my home. Liked what she saw and accepted my offer stating it was a lot closer to the university than her current one. Moving in that weekend and got a small bonus from the new owners of her previous place for moving out quickly. We got on well together and her old car was sold for scrap. We would either walk together to the university or drive in my car depending on the weather. She done the shopping and the cooking. Our lives went on as had become usual, never of us dated and so we were home mostly together. Then on her 37th birthday she and I partied a little bit too hard and became lovers. She was my first, having sex again the following morning as well. Still a little hung over we hadn't yet thought it thru at all. I hadn't used protection, and she wasn't on any also. But what are the chances we thought once fully aware of our actions, in our case it was 100% on her getting pregnant. But we had become lovers and there was no going back for us, but protection was then used and we regularly slept together. Finally, the signs she might be pregnant started to appear and getting tests and then a doctor checkup she was confirmed as pregnant. Once we recovered from the shock, we stopped using protection and started working out what we wanted to do about the baby. She wanted the baby as she said it might be her only chance to be a mother, I also liked the idea of being a father. We could've married, but she said I should 've someone closer to my own age and would be my friend/lover. But we could still have fun as we called the sex we had. She had our daughter and was now always in my bed and travelled home with me during breaks. Still had her job at the university and she found my perfect life partner she said. A shy reclusive girl a year younger than I and was also fairly well off. With my friend/lover also became friends with the girl and that led to them becoming lovers also. Finally, we all had a threesome and of course no protections taken and record stayed at 100%. I got my new girlfriend pregnant and my friend/lover also. Which was good my new girlfriend moved in with us straight after becoming my lover. We married when she first started showing signs of being pregnant. So, when I finished my courses, I already had 3 children all girls. With my wife still having a year to go I, we at the love nest as we called our home. Our friend/lover left her job and became fulltime mother to our children. On my wife finishing her courses we moved closer to my family and started our careers; she was also pregnant again. Our friend/lover still living with us didn't get pregnant that time as she had her tubes tried on doctor's advice. But she runs the house and looks after the children, and she called momma by all of them. My wife is also called just mom by all. In all we have had 6 children 4 with my wife including 3 boys and 2 with our friend/lover both girls. Our friend/lover is still sleeping with us and will as long as she wants too and at 52, she loves all the children and a bit sad when my wife decided 4 was enough. But we're all happy with our arrangement.