I hated my sister in law from the first time I met her and it was obvious she felt the same way about me. The hatred continued till about 5 months ago. The truth is that I have always lusted after her and I now know she felt the same way about me. Fiona is a really stunning woman. She is so pretty and has an amazing body. She is also known as the town slut. Everybody I can think of has fucked her at some time. Anyway, five months or so ago we were at a family wedding with our respective partners and for some reason, despite our hatred for each other, there was a huge sexual tension between us all day. Late in the night we were both outside alone having a cigarette when I guess the booze got the better of me. I told her I hated her but that I couldn\'t think of anyone I wanted to fuck more in the world than her. She told me that she despised me and that if I didn\'t put my cock inside her straight away she would hate me even more. I have never experienced sex like that fuck. All that pent up lust and hatred culminated in one glorious mating that I reckon is the best sex I have ever experienced. I\'ve been lucky enough to have had quite a few women in my time but nobody, not even her sister has ever given me such sexual pleasure. Since then I have fucked her many times, now about once a week. We both know we should be together but for family reasons we haven\'t taken that step. She has told me that she wants me to make her pregnant and I would so love to do that. But I still love her sister so much and would hate to hurt her. I suppose, at the moment, I have the best of both worlds. A hot wife who I love fucking and her sister who is my gorgeous, insatiable slut.