Strange marriage of my Aunt

Just by pure accident I found out my quiet shy aunt marriage was a sham. My aunt my father's youngest sibling had married at 23 in 2019 and was yet to have any children of her own. She was born when my father was 17 and he married at 21 getting his girlfriend (my mother) pregnant so there's just over 4 years different in our ages. She was raised by their mother after the passing of their father when she was 7 and homeschooled. Making her a very shy woman, her mother even arranged her marriage to a man 17 years older than her. The man was rich and into politics and mainly wanted a trophy wife, who would be quiet and passive. Which was my aunt being perfect for, I would discover their marriage wasn't consummated in all their years of marriage. Her husband was GAY and because of his strong rightwing politics, couldn't let it be known. His assistant was his lover, and my aunt was used to make him seem like a normal average man. I went to visit my aunt with a baby's quilt made by her mother (lives with my parents). Her mother was unable to get about easily due to arthritis and as I'd to pass her home I was chosen to deliver it. I arrived and saw my uncle kissing his male assistant, luckily for me my aunt saw me and quickly got me out of the way. She told me everything and made me promise not to say anything to anyone. I agreed to keep the secret, feeling sorry for my aunt. The next day I heard my father say my uncle was away for a week and decided to visit my aunt to keep her company. The quilt was supposed to be encouragement for my aunt to get pregnant. But without actual sex there was no chance of that. My aunt was happy to see me as she wasn't allowed to visit anyone while her husband was away. So, every time he went away, I visited her and took her mother sometimes as well albeit rarely as she wasn't able most times. Finally, I was feeling a bit bored and a little horny and my uncle was away, so visited my aunt. She sat close to me we were touching, not that she meant for anything to happen. As I said I was a little horny and so I made a move on my passive aunt who didn't know how to respond. I took it further than I at first was going to do, not that I thought about any. No actual intercourse, but I did get to finger her and suck her breasts. Then my phone rang, and it broke my lust. My aunt was at first somewhat shocked but had liked my attention and so the next time I visited. I was able to try again and that time I bedded her, taking her virginity and making her my willing lover. I used condoms and sex became regular between us, I've had relationships and sex with my then girlfriends. But nothing as intense as with my aunt, of course it couldn't stay secret. My uncle returned early, and we were caught, but so was he, he couldn't divorce her without his secret becoming known. I said people were starting to wonder about his marriage as there were no children and him being such a family man. We came to a sort of agreement; I would comfort his wife and maybe even get her pregnant and he could continue on as usual. He willing agreed as it would solve a problem, he had become aware of and so I stopped using condoms with my aunt. I got her pregnant fairly quickly and that made my grandmother very happy, albeit she didn't know I was the father of her upcoming grandson. Now my uncle passed away just over 15 years later and had 4 children according to obituary all fathered by me. His lover had passed away 2 years earlier and my uncle then retired from politics, but his health was bad at the time as well. Our secret is still secret as there is no reason to expose the truth. I also married a girl I started dating while fucking my aunt. With my uncle's help we bought the house next door to him and my wife, and I would watch over my aunt while was away. My wife willing joins in sex with my aunt and has had 5 children for me in our 17 years of marriage, marrying 2 years after I started fucking my aunt. We were included in my uncle's will and my aunt is past having children but is still a very willing bed partner of ours.