WHEN titian-haired publish ing titan Judith Regan took up with former top cop Bernard Kerik, she thought she'd met her match. And vice versa. But the illicit relationship came tumbling down, a friend of Regan's told me, not when she discovered her married lover had another mistress. It ended horribly after Regan learned Kerik's wife was pregnant. After that jolting discovery, Regan — as volatile, driven and foul-mouthed as any man — began using other words to describe her lover. "He's maniacal. Insane," a terrified Regan confided in a pal. Kerik, she said, had Regan followed to Los Angeles. He...
