She also married into one of America's snobbiest of Wasp dynasties, the philanthropic Mellons of New York, and is a sought-after fixture on the London social scene. Even in her private life, Tamara Mellon, 35, displays an impulsiveness typical of her father: when she separated from her husband, Matthew, last year she famously had a Mrs Robinson fling with Oscar Humphries, 13 years her junior and son of Dame Edna's creator, Barry Humphries.