She looked at me and watched me quickly take my own cock out and start to masturbate quickly. With that, she took his cock in her mouth and sucked it.... She licked around his head, as she wanked him slowly. He had a big cock and it was amazing watching her enjoy it. She licked up and down his shaft before taking it in her mouth. After a few moments he paid her some attention, spreading her legs and moving in to lick her pussy. My wife enjoyed this and spread her legs lifting them up and wide. I. "Look mate," he explained, "you're always complaining what a bitch she is and how you would like to get even with her, well now's your chance." Yes I know," I said, but still she is still my sister."She'll never know," he kept pushing, "that's the beauty of this thing, one drop in her drink and we both fuck her, next morning she wakes up with a headache and no memory of what happened." Yeah, but I still don't know," I said."Ok look," he said, "what we do is this, one night when we're all alone. He had many fantasies involving the two of them. In some he and another guy were watching Anna and another woman pleasure each other, but in most he was there with her participating in some way while her pussy was being pounded on by other men. The common theme in most of his fantasies was there were more men than women and Anna was always being fucked by guys with huge cocks. He quietly wondered if she would be spoiled by these big cocks and not find his average cock adequate, but, ultimately,. "Do you ever want to leave this place," asked the woman. "Yes, please," I stated. "I might let you leave here someday, if you agree to do something for me," stated the woman. "Anything," I stated, eager to end my nightmare. "I want you to beg me to allow you to have a sex change operation." "You will get larger breasts, higher voice, few minor changes to your face, and of course a vagina." "All you have to do is ask," stated the woman. I wanted my freedom very badly, but her request was too.