"The first thing I saw was a flash of anger on her face so I cringed waiting for her to hit me. But instead she sighed and said, "You have a deal."I w...s sure she would never do it so I started to say, "That's okay, Shelly. I'll do ... Did you say yes?" She nodded so I asked, "Are you sure? You don't have to if you don't want to. I'm willing to do it for nothing just because I love you as my sister."I don't know why I was trying to talk her out of it. Indeed there had been many times I imagined. He then told me to stand on the sofa, and put my hands on the wall, within seconds I felt his hands on my asscheeks, started to part them, I was then shocked as I felt his tongue licking my asshole, it felt amazing, id had a few girls lick my ass in the past but he was by far the best, I could feel my cock getting harder as he continued to rim meA few minutes later he removed his tongue from my ass, and told me to turn around, I did as he asked, and he quickly started licking up and down my. Well, I just can't." Are you too bashful?" I... no, I don't think so." Are you afraid of being rejected?" Well... maybe." Oh, Grandpa! Women would be crazy about you. I know I would." No, honey! You don't mean that. I'm just an old man. I don't have anything to offer a woman anymore." Yes, you do, Grandpa. You're still a very sexy looking man."I laughed. "No, sugar, you can't mean that." Oh, but I do, Grandpa. Nobody turns me on like you do." Oh, my goodness! Sweetie, you can't be serious." Oh. She invited me in and after some talk it was already evening. We went to the restaurant to eat and soon after came back to her room.She went to her cubboard, took out her sleepwear and as I watched she started undressing infront of me. She looked over at me with a small almost shy smile as she slowly undid her blouse and dropped it to the floor, next was her high heals and then she slipped out of her skirt, underneath it she wore a small red g-string that barely covered her pussy, she turned.