We had finished dinner. My sister said we should watch a movie. She was going to get a shower and asked me to find something good and cue it up.I had ...he movie ready and was sitting on the couch when Nandini came in after about 20 minutes. She was wearing a thin kurta, and it seemed nothing else. My cock hardened a bit.My sister was very attractive in a very nerdy way. She wore glasses that made her look very professorial (she actually is a professor). I had always been mildly interested in. I was getting worried thinking if it will fit into my unprepared asshole."Do you like my cock?" "Yes mistress, I do." Good, now, open your mouth!"She grabbed my head with both her hands and as I opened my mouth she slowly started to push my head against her cock. It was so fat i nearly dislocated my jaw but I managed and let out a faint moan .She pushed it inside few inches and then took it out, then she started to slowly fuck my mouth, deeper and deeper with every stroke. It was so huge I. She jumped down off the table and slid off her tennis shoes. Her feet were cold in just her thin white ankle socks. She slowly unbuttoned her jeans and slid them down her small hips. Her long legs were smooth and silky against the rough denim. She bent over and pulled the leg of the jeans down past her feet. She heard a knock at the door and spun around as the door opened. She stood there, in her white t-shirt and panties. Her white lace bra and matching boy shorts were clearly visible. I patted her wide rump as she went and got a smile for my efforts. An hour or so and several more tankards later, Nan came to my corner table, looking crestfallen."I dinna can do it," she said, "the boss has promised without me knowin' it. I'm truly sorry." Promised you," I said, "Who to?" One of the sheriff's deputy's, a mean one at that." She jerked a thumb over her shoulder."The big one with the red curls?" I asked."Aye," she said. "He's a reg'lar." I'll talk to him." Oh," she said, eyebrows.