I then reached up her back to unzip her dress and moved the shoulder straps aside to let the dress fall to her ankles.Standing there, naked except for... her strappy panties, she stepped out of the dress and grabbed my hand to lead me to the bed. With my eyes fixed on her bare full breasts and pink nipples, she straddled me and smiled before pulling my shirt up over my head and removing it. She then got closer to kiss and lick the side of my neck and crawled her way down my body to take off my. Trying to ease her T-shirt over her head I suddenly and surprisingly felt her stiffen very slightly. I paused and looked at her slightly questioningly."It's been a long time," she said, "two years since Alan has died, and he was sick for a while before. There's been no-one else" "Shush," I said, "relax, everything is okay." I held her hands then stroked her cheekbones and kissed her once again. Now, with her assistance, I lifted the T-shirt over her head and freed her big womanly breasts.. " Fair enough. Follow us then."It only hit me after a few minutes that they must want to have sex with me. "What else do they need an adult human male as a 'guinea pig' for? These little rug munchers clearly want to try having sex with a man." I thought to myself.We went back to her room and they told me to follow all of their orders. I was told to take off my clothes and sit down in Rachel's chair. Lola meanwhile left the room as my stepsister tied my arms and legs to the chair. I gave her a. My Sister is the only one that has made me cum that much before." Your Sister…." His eyes widened as she spoke and incredulously he asked, "You mean….you have had your pussy licked before?" Oh yes, many times. My sister makes me cum all the time, and several of my girlfriends and I share the same fun time play."Her Grandpa fell back and sat on his haunches, staring at her, mouth partly open in disbelief, shaking his head. "I guess I should have known this when I saw you 'Jilling' yourself when.