Who is Kay Graham from Buffett: The Making of an American Capitalist and what is their importance?

Kay Graham inherited the Washington Post when her husband died, but had no idea how to run it. She hired Benjamin Bradlee to run the paper, and it became famous for publishing the Pentagon Papers and then breaking the Watergate scandal. Buffett began to buy stock until he owned 10%. He was invited onto the board of directors in 1974. Buffett and Graham became fast friends, and many suspected the relationship might be more than just platonic. No one ever knew for sure, but Buffett "schooled" Kay in the financial management of her business, an action for which she was certainly grateful.