Topic: lust for sis (part 1)I watched as Ellie thrust down onto my penis, I watched as her 18 year old snatch engulfed all 6 inches and I watched as I spurted my seed deep into my sisters womb. I woke, sweating, from the dream and was amazed, this was the fourth night in a row that I had had a dream about my sister. It had started when I had seen Ellie getting out of the shower, she had left the door slightly ajar and I had walked past at the perfect moment, She had stepped from the shower and I had seen her tight ass and I had also seen the side of one of her breasts, it was really just a bump but you know. From that morning on I had been dreaming about her and having daydreams where she would suck me off in her bedroom. I got up with my usual morning boner and got into the shower I jerked off as I thought about the dream. Once I had finished I cleaned up, got out of the shower and had breakfast. As I was eating my cereal Ellie came down in just her bathrobe “Sorry, I left my hairbrush down here last night. ” She said as she walked to the counter, she bent down and her bathrobe rode up showing me a perfect view of the bottom of her ass, she got up smiled at me and ran back upstairs. She was the only girl I had ever known who could give me an erection that quickly after Cumming. I only had three periods at school so I came home early and went up to my room and watched TV. I began to daydream and almost instantly my sister popped into my head, I imagined that she was blind folded and had her arms bound behind her back, I imagined myself pulling her legs apart and pushing my hard cock deep inside her, she moaned in pleasure and I began to pump in and out.