It had been just a few minutes later when his cock began to swell up. With his two buddies Mike and Trevor urging him on, I felt an even tighter grip ...round the back of my head. He began to arch his back once again as I felt his ass tighten up. He was on the edge of a powerful orgasm as another wave of adrenalin tore right through me. I began to let out a loud muffle moan as I tried in vain to remove his cock from my mouth. My fingernails now dug deeply into his ass as there were only seconds. As if he heard her thoughts, he nipped at her neck softly with his teeth. She moaned, but the sound was lost in the music. Her knees went soft and she sagged slightly for a moment before regaining her composure. She felt her thong get damp and she ground her ass into his groin again. Judging by the bulge she felt there, she was not the only one enjoying themselves.She could feel his smile against her neck. She turned again to face him, rolling her body and rubbing her breasts against his. She hadn't been aware that he was going to effectively blind her like this, but she found that it turned her on like crazy. "What's going on", she asked, trying to make her voice sound frightened. Her husband didn't respond, but she suddenly felt something cold and sharp press against her neck, just below the drawstring for the sack. "What the fuck", she said aloud. "You brought a knife?" Sarah couldn't believe that Charlie was actually using a weapon for this and she felt her desire to. She looked up at me "What's wrong? Don't you think I am pretty?" her eyes had tears in them. "No baby, that is not the problem, I think you are beautiful, and the best thing in my life, but what I did was wrong" I put my arms around her and hugged her, stroking her beautiful blond hair. "I am your step-dad, you are as much my daughter as if I was really your father, I love you so much, and I do not want to ever hurt you" She looked up at me again, "I love you too, and I want you to be.