Dads Second Wife Was A Cheating Slut

My dads second wife was a real classic bitch of a step mom, if I can even call her that, I was seventeen when they got married and right away she started treating me like a slave. My dad was travelling a lot for work back then, one weekend after telling her I was going to be staying at a friends a few hours away it fell threw so I drove back home. This was long before everyone had a cell phone and as I am coming down our street I see this strange car in the driveway. I thought it was odd because it was like eleven pm so why would someone be over and something in the back of my head just told me to check it out instead of coming in all noisy. I parked on the road and walked around behind the house, looked in a few windows and did not see anyone downstairs, I slowly crept in thru the garage and into the house and within a minute hear sounds of sexual ecstasy coming from upstairs. She had a guy in their room having sex with him, walked upstairs and listened by the bedroom door for a few minutes then went to my room and just stayed there waiting for him to leave. Hour later after what can only be described as a pussy pounding finishing fuck he got dressed and left, I had no idea she was totally naked for seeing him off downstairs and was waiting in the hallway upstairs for her to come back. She screamed like someone was going to m****r her when she saw me, covered her boobs with one hand and her pubic area with the other and started yelling at me like I was the bad one here. She started crying begging me not to tell my dad and I pushed her down the hallway to my room, she was staring at me then over at the bed and just shook her head no but laid down anyways. I pulled her back off the bed onto her knees and made her suck my cock as deep as she could take it gagging her a few times, did not want her enjoying this at all so I just kept doing it making her gag now and then. I got called a few names and told her that was till better than a cheating slut like you, told her to get up on the bed doggy style and rammed her pussy quite a few times and thumbed her ass some listening to her grunt the whole time. Some where in there she yelled out Fuck, I want to be able to walk straight tomorrow as she grunted and groaned. I pulled out and told her to lay down on her back, crawled right up there over her face and made her stroke me off until I came squirting it all over her. My dad would still be gone for three more days, I woke up the next morning before seven or so, walked right into her bedroom and got on top of her in bed shoving my cock in her face to suck on. The look on her face was one of disgust and I am just fucked, she opened up and did it without complaining, I had a lot of fun with her that day and she knew this was not going to go well for her with me having this over her. That afternoon she just relented, told me fine if this is what it going to take to keep me quiet then fine. Day two she had a change of heart telling me that I did not even have any proof there was a man here or she had this supposed lover so I could fuck off as far as she was concerned. I laughed and told her well, that may be so but his car should be easy to find given it was in older one and stood out easily. Week later when my dad was home again I showed her a piece of mail I had taken from his mailbox and oh by the way hope you knew that he is married also. Her mouth dropped open and she said WHAT!! in the loud whisper even though we were the only ones home at the time, she gasped crying and trotted her ass upstairs slamming her bedroom door. I figured it would be a bad time to ask for a blow job so I left her alone for a few days but already had a plan for when my dad left on business again. She lasted about two years, my dad actually caught her over at this other guys place, she even screamed at him that I had been r****g her for this whole time also telling him his son was a complete asshole. Did not even bother him and he told her she probably like me doing it to her, he asked me about it later on and I told him Hell no, are you kidding me, I could not stand that woman. He believed me of course because she was caught red handed cheating on him. I saw her like a year later at the store and just laughed at her and blew her a kiss. I still remember her fat cellulite ass cheeks bouncing around as I fucked her hard doggy style and holding onto her dark curly hair when fucking her mouth, honestly it was a lot of fun black mailing her for sex because to tell you the truth I do think on some level she liked it because her pussy got quite wet when playing around with her.