Lisa's next plea turned into a yell of pain, She tried to wriggle and squirm, but she was bound too well, My cock dribbled again. Don slowly stroked h...r cunt region,"OH, GOD. Please no," Lisa was sobbing now, tears streaming down her cheeks, for the first time I was concerned about her well-being. Is this what her husband warned me about, should I intervene? Inside my jeans my cock told me I was enjoying this too much to stop it and anyway, surelt there would be no material damage to this. Before leaving for the day I told him, "I'll be around a couple more days so if anything comes up you're unsure about give me a call on my cell. Its Monday now and I expect to be leaving Thursday."On my way home I decided I didn't feel like cooking so I stopped at TGIF for dinner. After dinner and a couple of cold brews I continued my trip home. It didn't feel right to eat out by myself but I figured I'd better get used to it for awhile. Maybe forever for the way I was feeling about my marriage. "You?" Both tones of her voice sounded odd, ragged, as she asks me. "Our genetic code is different. It won’t work. And you are only human." Her whole body shakes, and I can tell she is in dire distress. “We have to try something,” I plead."I may have no other choice." She now sounds resigned to the possibility.Her hands move in the air before her, hitting her invisible buttons, and the white light around me turns to the healing greenish-yellow for a moment, restoring my strength and killing the. I closed my eyes and my sister entered my mind, her long legs leading up to her tight arse, her C cup tits bouncing as I imagined her slim fingers slowly wrap around my cock and gently glide up and down the length of my cock, I could feel a build up of tension between my legs, my whole body was shaking, I gasped and my cock erupted with three streams of thick white goo landing on my chest. I lay there, motionless, taking in the blissful feeling of my first orgasm. Then I heard the front door..