I moved out from under her and Mark took my place. He guided my cock as it slid easily into her well fucked, cum filled cunt. He licked the length of ...y cock as it slid in and out of her, licking the mixed cum from my shaft. After watching and tasting their cum as all these guys fucked Penny my cock was nearly ready to explode and watching the guys all playing with each other as they watched me taking my turn fucking her it wasn't long before I came, adding my load of cum to her already filled. We arrived at their house on Friday in the late morning with plans on staying until Sunday morning. We were greeted at the front door by my brother-in-law with the usual hugs and hellos. We made our way to the kitchen where the kids ran to greet each other and finally my sister-in-law walked into the kitchen behind them... wearing a bright yellow shirt. We exchanged hugs and we gave each other quick glances of coy smiles. Even though we've played before it's still a little bit awkward the first. ”“Never!” I said defiantly, playing along.“We’ll see how long you can keep your sanity,” he said evilly. He pinned my arms behind my back and forced me to the game room. In those heels, I was just trying not to fall over. He deposited me on the throne and quickly bound me to it. Using our easy-fasten restraint straps, he wrapped my wrists to the arms of the throne. Loops around my shoulder and armpit pinned me against the back. More straps tied my feet—still in high heels—and knees—spread. I was surprised, we hadn’t shared the same bed for six years, not since I was ten and I had innocently placed my hand on her breast when we slept. My mother had woken up and yelled at me that time. Now however I knew why, then it wasn’t quite so understandable.“But Mom I don’t wear any PJ’s.” I said trying to get out of this. I knew the duvet on my bed would be lovely and warm tonight, after I’d spent enough time in it to raise it’s temperature. But my Mother was adamant that I sleep with.