Best Deal I ever made

I'm Arthur 36 and have 3 children with my ex wife Joanne and they are with her. I've always done well career wise and that didn't change after the divorce. Still well off after the divorce and able to whatever I want anytime I want. Joanne and me are still on good terms and there isn't any problems causing trouble for me. I only have one sibling Karen 32 single quiet and very reserved person who prefers to live quietly and away from people as much as possible. After a holiday in late 2019 I decided I wanted out of the city and so moved to small country town and bought a house on acreage. I would go to the city every now and then, I got the usual chickens, 3 horses and a dog Spike. Shortly after moving onto property, Karen asked could she visit and of course I said yes. Karen works from home and as long as there's a good internet connection she okay. Her main reason for coming was the construction of a new building next to her apartment building and the noise was annoying her greatly. She and Spike took an instant like of each other and were soon together most of the time. Even before the pandemic struck, Karen was thinking of moving to the country like me as she really enjoyed living with me and the animals (mostly the animals). With that in mind and me not seeming to date much, she asked would I mind her living with me fulltime. Your most welcome I told her and so she sold her apartment and moved in fulltime with me. Being close together all the time and a lockdown in place, I got rather horny. With only Karen available I thought of asking her for sex. But let it stay as a thought, but Karen had also started thinking about sex. Not for fun but for having children of her own, it had came to her mind while my children had visited before the lockdown had started. She had started checking out I V F online as away of having her own children, but the legal conditions were large for a single woman to meet. For most women, they could sleep with a man and not take any precautions and that would be that. Not Karen she had never dated and the idea wasn't an option for her. The only man she was comfortable around is me, so during the lockdown she made me an offer of regular sex. If I got her pregnant, I was a little shocked at first. But I soon got over it, agreeing we started sleeping together and I took it slowly and after taking her virginity and not taking any precautions myself I was really enjoying sex with Karen. But I shocked by how fast she got pregnant, I assumed it would take a couple of months at least. But I had gotten her pregnant the first time it seemed, but Karen still let me fuck her after the test kits showed a positive result. So that was great for me, after the lockdown ended she seen a doctor and was confirmed as pregnant. Karen told the rest of the family she had I V F, we continued on as during the lockdown. With the prospect of another lockdown being enforced, Joanne decided to also move to the country and of course she came to my place with the children. Karen moved back into her room and I hoped Joanne would want to stay long term. But it turned out it would be for good, Joanne got aroused by Karen being pregnant and she was attracted to Karen sexually. Then one night she joined Karen in her bed and they became lovers, that was another new experience for Karen sex with woman. But Joanne soon realized who was the father of Karen's upcoming baby and so she confronted about it. Not able to lie about it I admitted it, to my surprise she asked me to get her pregnant again also. Instead of sneaking about Karen and me could resume sleeping together fulltime with Joanne also joining us fulltime. Joanne didn't get pregnant straight away, but she did get pregnant and me remarried in April and the baby is due next month. Karen had a boy and she still lives and sleeps with us both still and wants another baby later on.