Bobby had whisked Mary off to Ireland, and she got pregnant. He proposed right away, and that was when Mary learned the truth, that Bobby and Emily were still married. She didn’t care. She was that much in love. Like Carolyn Bessette, her future cousin-in-law, Mary chose to ignore these blazing warning signs. Like Carolyn, she imbued her Kennedy man with all the qualities he lacked—self-awareness, humility, and intelligence. Mary was brilliant, always top of her class, a voracious reader and generator of ideas. Bobby, not so much.

