I stood straddling her body, carefully controlling my strokes by bending my knees. A few minutes later however she began asking me to fuck her ass har...er. Gradually everything escalated to where I was actually punching my stiff prick into her with everything I had, even as she kept pleading for me to keep fucking her ass harder and harder. She collapsed from her knees to lying flat on her stomach and began rubbing and fingering her own pussy. I moved my hands from her hips to the headboard.. Then, he throws her on the bed. Dont try to get away from me, he says angrily. He ties her hands to the headboard and her legs to the footboard. He smacks her inner thighs again and she begs him to stop. Dont pretend you dont like you, you slut. He climbs onto the bed, in between her legs. He leans down and kisses her. Then, he kisses her neck and chest. He makes his way down to her boobs and he takes one in each hand, forcefully squeezing them and flicking the nipples. He puts one nipple in. .reaching down in front of her and slipping my fingertips beneath her tiny bikini top where I feel the soft flesh of her petite breast, and the rigid stiffness of her nipple.She smiles and giggles and murmurs with pleasure as I run my fingers deliberately over her nipple. Her fingers tighten slightly around my cock, holds it steady and she looks up at me again."Do you want to fuck my hand?" she says in a cute little voice that almost makes the question sound innocent. "Do you want to fuck. ” “You've just been waiting this whole time?” “Well, not exactly. I've played with you when you're asleep a couple times. Here's your shorts back.” She handed them to me. “Oh my God, Sinead.” The full reality of this was setting in- that she was no longer my sister, but my girlfriend. It occurred to me how suited we were for each other, how similar our interests were, how well our personalities matched. It seemed almost as though we had been made for each other, even if we were brother and.