Step-son seduces his cheating step-mother, Part 1

My step-sons calls me into the living room. He calls me out for cheating on his step-dad and shows me a video that he took catching me in the act. I am shocked that someone found out. I was so careful. I feel ashamed. He threatens to tell my husband, so I beg him not to, offering him anything. Surely he would love a new video game or something like that, but to my surprise, he tells me that he wants to see my new tits. I am taken back and start to get very mad. He tells me that he is serious, but I brush him off telling him thats gross, Im his stepmom. He again threatens to tell step-dad so I finally give in. I slowly pull out my new tits. I am disgusted, humiliated, and pissed off. I notice my step-son touching his cock through his pants. I put my tits away and tell him were done. He threatens again to tell my husband so I give in, turn my head away and pull my tits out for him to see. He makes a deal with me as he strokes his cock staring at my breasts.