I blackmailed my Mum

I'm Chris 21 and last year I saw my mum Belinda 40 with another man, I didn't know the man then. But I soon found out he (Tom) worked at the same company as she did and he was also married. My father Donald 47 is an arsehole of enormous proportions, but he also has a prenup with Belinda that if she plays up, she gets nothing. Our family is well off and if Donald found out Belinda wouldn't much at all. I worked out pretty quickly that Belinda's secret meeting were just sex and not a relationship. I'm no playboy far from it, but I'm not a virgin. I've hired hooker before and got sex that way, also I've fucked our drunk neighbor a couple of times and she is in her sixties. I'm an sexual opportunist and use what ever I can to get what I want. So I managed to get video of Belinda getting fucked by Tom and so the next time Donald was away and Belinda was home alone with me I played the video for her. She was totally shocked and angry with me at the same time. But she calmed down after awhile and I told her what I wanted from her, She wasn't happy that her only son wanted to fuck her. She refused and I decided to wait and let her think it over. The following day was raining and I was sitting watching T V, Belinda started asking if I would sell her the video and I said I want sex nothing else. I then added It was like a form of insurance for her as well, if I was fucking her I couldn't tell Donald or even show him a copy disc as I would be just as involved as her. She left me alone and went into the kitchen. Later she called me into the kitchen and asked why was I punishing her so badly. I told I wasn't punishing her I just wanted sex and use whatever means I can to get it. Also if she was horny and had relationship outside the family there were more risk of her getting seen and Donald finding out. But if people seen us together they wouldn't think anything wrong about seeing mother and son together, short of catching us in bed fucking that is. Also she didn't have to go sneaking around, we could go somewhere together and Donald wouldn't suspect anything. She left to think a bit more and then agreed to try sex with me as long as I destroyed the video. I answered after we fuck at least 3 times, she nodded and I asked when do you want to start. I will let you know she said, later that day she told me we could fuck and we went to her bed and we had sex and it was a little awkward at first, being naked with your mother the first for sex. But that night I joined her in her again and it was a lot better and the next morning we fucked again. I thought about asking her to give another fuck before destroying the disc. But decided to show I could be trusted and keep my word. I destroyed the disc after showing it was the right one. She was happy that it was destroyed and that I didn't have a copy. Later in the day, she told me I could join her again that night her bed. I've fucking her so regularly since then, she has told me she is happy with arrangement as is. Donald is home sometimes I fucked Belinda and he doesn't suspect anything.