I lowered my mouth as far as I could and sucked, as he began to buck in and out of my mouth. I moaned, letting him feel slight vibrations as he finall... slid a little bit down the back of my throat, even daring to swallow to let him feel my throat tighten slightly around him. ‘I can’t take this, I need you.’ He gasped out causing me to look up only in time for him to rip my panties off my body, drag me up, and position me on top of his cock. I wondered for a minute there if he was going to do. He carried me allthe way upstairs and laid me gently on the bed. He slowly and cautiouslygot on top of me and we were both exploring each other's bodies andmaking out passionately. I started unbuttoning his shirt and his pants.He was getting very aroused and I suggested that we both get intosomething a little more comfortable. I went into the walk-in closet andfound a very sexy La Perla silver satin nightie and took it to thebathroom where I changed. I took off my blouse and my leather skirt. 'Please before God spare me that, please'!He just smiles. 'You had your chance to put this off by taking my seed with your beautiful mouth'. 'It is now time for you to know this other pleasure'. 'Fear not'. 'Your sweet pussy has me ready to fill you again and this excites me'. 'I will not use you long before you draw my seed into your body again'.With her still pleading he comes out of her pussy and presses his knob against her well lubed flower. As before she squeezes to try and prevent his. "Son of a bitch," I said. Apparently, the shock of seeing my sister in this context had left me limited to obscene language."Told you it was huge," Joe said. "Our sister's not just a slut, she's an internet slut." Unbelievable."I watched as Joe spent several minutes clicking on pictures or running the video clips. I saw Christine kissing a darkhaired woman and sucking her tits, Christine sucking on a guy's cock and letting him fuck her. Christine taking another load of come into her mouth..