."He wasn't at all aroused by Cathy's vulva inches from his face, but Bill, as stated, was intensely curious."I've seen diagrams in books, but the rea...l thing is very different, isn't it," he said. Cathy pulled her labia apart to give him an even better look."Yes, I expect most adolescent boys nowadays have seen quite explicit videos by the time that they get to see a real one up close, so there is no mystery; but I'm sure men and boys of our generation had no idea, Bill; and even when they were. Using mylong, sharp fingernails I began to tease his balls and with one fingerI discretely worked one finger to trace a circle around his asshole. Hespread his legs slightly to give me better access to play with hisballs, but as I started to feed his cock down my throat I dragged afingernail directly across his asshole. He let out a moan of "Oh yes"and as I looked up he nodded to me thru eyes glazed over with lust. Icould feel the beginning spasms and knew he was close to cumming so Itook him. A current of 440 volts run all over my body. Then I controlled myself and realized that I should not think like that she is sister to me. But I don’t know why my feet’s moved towards her room I entered her room she was reading her book of mathematics, my eyes started staring at her while standing on the door of her room. I was interrupted by her voice,” I am sorry bhayia (brother) I won’t disturb you again when u r studying “. I entered her room and sat near to her and said “its ok, what was. ” She put her cup down and we were finally at an understanding. I shifted closer to her and she dipped her chin shyly, her face tilted a little side but her eyes turned to look full in to mine. I explored them for seconds that seemed like minutes, so much youth and happiness in those chestnut brown eyes. I leaned in. They were the softest lips I’d ever kissed and as they touched mine, surprisingly cool, she barely perceptibly kissed back. My hand rose to slide under her pretty curls, tousling.