Something that never seemed right to me, was when Kay first met Michael's family at Connie's wedding. As Mike and Kay were eating their lasagna, Mike told her the story of how his father got Johnny Fontane out of his contract. He truthfully told her, in no uncertain terms, exactly what his father and Luca Brasi did. At this point in the film, Kay was the straight laced New England, non Italian school teacher. I think its safe to assume that, at the most, she heard of "gangsters", but was never really exposed to them. My question is, why did she still stay with Michael? Sure he said "That's my family, Kay. It's not me." Did she really think the fruit fell that far from the tree?