I caught my mother with another man

My family is rich and I'm their biggest disappointment I didn't finish high school and left to become a mechanic. My father is the biggest jerk I've ever met; thinks he knows everything because he is rich. He's not and I can't figure out how he graduated college and still be so dumb. Like everyone knows Australia is an island right, my father said it was part of Africa. Looked shocked when I showed him it on a world map, after several moments said he was just testing me. Anyway, he is an A**hole and treats my mother rather poorly, he has secret affairs but has a prenup with my mother. She wouldn't get much if she got caught having an affair. As the youngest of 3 I'm the only one not to go to college, both siblings are married and I 23 still live at home. I'm not that dumb you see meals provided and laundry done by the house staff not my mother. I've seen my father with several women, and he knows it as he saw me. So, no hassling me to move out, my mother 50 seemed content to be a neglected wife. Till the day I saw her with a stranger coming out of a motel room, I'd been called out to a breakdown. She saw me and tried to hide her face, so she felt guilty you could say. She left in her car and he in his, I got home before my father, I wasn't too concerned over her affair as my father was having them also. But my mother was very worried, it according to her first fling outside of marriage. True or not I still wasn't concerned. My mother is a great looking woman for her age, so when she offered me anything to not say anything about what I saw. I do okay dating, no special girl as yet. My evil side you could say came out, not expecting her to agree asked for sex with her. Ready to say, I'm just teasing you and I wouldn't tell the jerk anyway. When she answered OKAY if that what it takes. I was at first shocked and then aroused, of course we couldn't start that evening. But I said the lake house on the weekend, she agreed. Shortly after my father arrived home, said he would be playing golf all weekend. My mother said she was going to the lake house to paint and was taking me to clean up around it. My father thought it a perfect idea, I did too actually. Two days later Friday afternoon on my getting home, my mother was ready to go the lake house. A quick shower and we left after dinner, two hours later we were at the lake house. I still thought my mother wouldn't thru with it. But she asked me after we entered the lake house, did I want to fuck her straight away or shower with her first. My response was whatever you want, shower first then she said. She seemed quite willing on us entering the shower naked together and I got to fuck her in the shower, fucking again in her bed. In morning more sex and she started telling me she had needs and my father was doing his part. I just nodded I was going to tell her about his affairs but decided not to. Mainly because she might stop having sex with me and become upset, I hadn't told her before. So, I would keep both secrets and enjoy the benefits you can say. By the time we got back home my mother had really warmed to the idea of sex with me. No sneaking around, if seen together it just mother and son, even if naked we could say we were sunbathing, unless caught fucking that is. I'm still dating girls and regularly fucking my mother, I get a lot more sex off my mother then, my dates. Seeing my father again with another young woman, I decided to leverage it to my advantage. That's how I got my new pickup, he told my mother it because I was helping her a great deal more. She said OH he really is helping a great deal and smiled at me as she walked away. My father is still clueless as if he knew would've filed for divorce. I'm not so dumb after all.