Privileged conversation

She is a Broadway dancer, exquisite and mercurial. He is a dedicated psychiatrist, happily married to a beautiful woman, the father of two lovely children vacationing with their mother on Martha's Vineyard. "Good morning, sir," she said, as she passed David Chapman on a sunny June day in Central Park. Moments later, she was locked in mortal combat with a mugger, and David came to her rescue... They tell each other some truths, but only some. They know each other's mysteries, but only some. They slip into a realm of sensual deception and imminent danger... For who is Kate Duggan really, the…