I didn't have to give her any instructions. She was by no means a virgin, and although she would never be a great scientist, fucking came natural to h...r. She made the most of the limited range of movement she had, slapping her butt against the wall as she fucked her brother. It wasn't long before she had another one of her dripping wet orgasms. Panting and shaking she steadied herself with one hand against the opposite wall and pushed back against the hole as much as she could and let her. "By the way," dad asked, "just who do I say is coming?"I did not want to baby sit for Sheri since she knew me really well. Icut her yard. But dad wasn't in the mood to argue about it, and since Iwas still alive, I accepted my fate. Swallowing hard, I said,"Carolyn", and dad picked up the phone. He set the time for me, thentold me what time I had to be there. Not wanting to wear slacks orjeans because it might help her recognize me, I simply went in thekitchen and made us some sandwiches. Dad. Suddenly the plastic tube was pulled from my anus and quickly replaced with a small butt plug. Steve then told me that he would be back shortly and as he turned and left the room I squirmed in the stocks as the liquid sloshed and churned inside me.After a while I started to come over a little dizzy and light headed and was relieved when I heard Steve come back into the room. He removed the plug from my anus and I couldn't stop myself from immediately expelling the remaining liquid which spurted. I felt my load accumulating, pin and needles on the tip of my cock, heart beating so fast , vision almost blurry and she knew it. And suddenly I felt an eruption of ecstasy, resonating from my cock - encouraged by her lips - to every nerve ending of my body.It came like I had never before, again and again my muscles convulsed and pumped it out all over her face ,her tits and into her mouth. I looked at her as I lay there half paralyzed as she swallowed by cum, licked what ever she could off my.