.." she moaned as I slowly moved my finger in and out. I wanted to take my time, get her body used to it. The last thing I wanted to do was hurt her. ...More?" I asked, my thumb coming up to rub her clit. She whimpered, and as she arched her back again I licked over her neck. "God, more, please..." she begged. I added another finger, but held still as I noticed the way she hissed in pain. "Hurt?" I asked, worried. She shook her head. "A little," she responded. Her hands went to the back of my. .. Is that from..." She got up and left. I felt so awkward. I had just seen my sister and her girlfriend fooling around. But I was aroused. Not from her girlfriend though. My sister looked amazing with her legs spread. After a little while my phone rang. It was my mom. My mom and dad were on a trip for their anniversary and had just left he day before. After I got off the phone with her, all I could think about was my sister. Once again I heard foot steps. Then my sister turned the corner.. His cock twitched with excitement."Tell me what you want" Sarah asked."I want to bend you over and fuck you so hard!" He enthused.Sarah walked over and licked her fingers, wiping her saliva on his cock to lubricate it and then turned away and bent over the bed. She again licked her fingers and reached down and lubricated her pussy before guiding Carl's rock hard cock in. He pushed forward and in three thrusts was balls deep in her tight hole. Both of them gasping with pleasure. Carl was true to. It was awesome her tiny body twitching with every injection of his seed, and she, screaming her orgasmic release, such as I had never seen in any woman before, even in a porn film, his heavy body collapsed on her, as she again passed out. While she was comatose he withdrew, Dennis getting a close up shot of her cum filled cave, reamed out and wide open, dripping with his seed, as he rolled alongside her, his long tool laying on his leg like a huge soft black extra arm, still dribbling white.