My shy quiet nephew

I married my husband in 2019 I was then 32 and he 51, he had made it to top of his career. He had then decided to start a family of his own and married me, I worked for him and was the only female employee not married and young enough to have children. So, I went the bottom to top, I'm nothing special in looks and hadn't done well with relationships. But after almost a year still not pregnant and so I got tested and nothing was wrong with me. I couldn't get sample off him to test and so I made a copy of his health record and showed it to my doctor. Who said it was most likely him who was the cause of not getting pregnant, he was on a cocktail of different medications for different ailments, and they limit your virility. So, I didn't want to be cast aside because he couldn't get me pregnant. So, I started looking for a replacement in the family and there was only one who was closest to him. His younger sister's only son, her son was then 23 and attending the local university and living with his widowed mother. The mother wasn't well and was in and out of hospital chronic lung disease and the corona virus finished her off. They lived in a house provide by my husband and after the death of his mother I had him move in with us and my husband agreed to that and then sold the house. My nephew by marriage was so quiet and shy, I'd hadn't ever seen someone like that before. It didn't help his uncle was loudmouth know all either, overtime I got really close to my nephew and he relaxed when with me. I took it slowly and when my husband was away, I joined my nephew in his bed and started a sexually relationship him. I wanted to get pregnant and please my husband with a child. I did get pregnant and just in time, as my husband was getting annoyed by my failure to get pregnant. One it was confirmed I was pregnant my husband, returned to playing golf instead of sexual relations with me. I had every test to make sure baby was healthy and got a DNA test to make sure who the father was. My loving husband also decided to get a DNA test, he a really cynical man and a bit lazy also. After doing the swab for test asked me to send it off, which I duly did, after changing the swab with his nephew's swab. As he was the confirm father. When the result returned my husband was happy and only then did, he told his buddies I was pregnant. He wasn't interested in sex with me at least. But I was fucking his nephew anyway, I had trained him to please me and so I made the most of him. Having a boy was also to my husband's liking. The baby came in late 2021 and my husband was home a lot more, till the novelty wore off. I wasn't neglected as I was back to fucking the nephew, in April 2022 my husband had his first heart attack and didn't follow the doctor's advice and had another in June, one would think he would then follow the advice. Not him in September a major heart attack finished him. In his updated will everything went to his son and I and his nephew were the guardians appointed, I as long as I didn't remarry and used his stored sperm to father more children by him. His nephew still fucked me and again got me pregnant, and I had a daughter, and her DNA matched her brother's DNA and so was added to the list of children in his will. I'm quite happy fucking my nephew and as we moved to a large house in the country to raise the children, we've all new staff and the lawyers use my son's DNA as the benchmark to test against. Because my late husband told them he was his son and DNA had proved it. I'm InCharge of his sored sperm, as I'm the one to use it when it is required. But the stored sperm, I've replaced with the nephew's as it is fresher and delivered by him directly and regularly. I've decided to have as many children as I can and never take precautions and he does as I want, perfect relationship.