I convince my stepsister to have sex with me.

I got up in my boxers and went to the kitchen to make breakfast. I found my slutty sister in law alone in the kitchen and said hello. She noticed I was in my boxers and couldn't take her eyes off me, she was staring at my cock while biting her lip, and I could tell she wanted me to take them off. So, the moment I realized what she was after, I pulled down my boxers and asked her to suck my cock. She obviously refused at first, since I’m her brother in law and she didn't want her boyfriend finding out. But it didn't take much to convince her, I knew she was great in bed and loved sex. She played the shy girl at first, but ended up sucking my cock like a total slut licking my balls and even my ass. She sucked every inch of me, and then I fucked her hard, pounding her from behind. She was incredibly horny and totally submissive, letting me fuck her in all kinds of positions. She asked me to cum in her mouth so there wouldn't be any evidence that she was cheating on her boyfriend with me.