Instead, the First Lady hugged Mrs Cogdell's two youngest children - Maysie, eight, and five-year-old Presley.
Despite an undoubtedly busy schedule, the President's wife remained relaxed, introducing herself to everyone personally as 'Michelle'.
Loved the hair, pinned back simply: there is nothing stuffy about this woman.
For the daytime, Sarah Brown made the shrewd choice of wearing a tailored navy outfit by Britt Lintner, an American former banker who now runs her own fashion label in London.
She began a relationship with Callum but dumped him after discovering he was using Bethany for delivering drugs.
Her sister in law, Kylie Platt, would later murder Callum after she found him attacking Sarah and three months later, Sarah would find out she is pregnant with Callum's baby. Father Brian initially rejected Sarah because of Gail's affair with his cousin Ian Latimer.
Sarah gave birth prematurely but baby Billy lived for only three days.
Crew ensemble, she wore a black satin A-line coat over a fitted dress with a cream bodice, topped off by her trademark pearls.
I get the feeling Mrs Obama is a bit scared of the Queen, and toned down her usually quite sparkly, out-there evening look for the occasion.
Power dressing: The G20 spouses line-up on stage at the Royal Opera House; From left, Ban Soon Taek, wife of UN Secretary-General Ban Ki-moon, Chikako Aso, wife of Japanese Prime Minister Taro Aso, Laureen Harper, wife of Canadian Prime Minister Stephen Harper, Gursharan Kaur, wife of Indian Prime Minister Manmohan Singh, Michelle Obama, first lady of the USA, Kim Yoon-ok, First Lady of Korea, Sarah Brown, wife of the British Prime Minister, Margarita Zavala, First Lady of Mexico, Svetlana Medvedeva, wife of Russian President Dmitry Medvedev, Emine Erdogan, wife of Turkish Prime Minister Tayyip Erdogan, Margarida Barroso, wife of Jose Manuel Barroso, President of the European Commission, Therese Rein, wife of Australian Prime Minister Kevin Rudd, and Dr Pimpen Vejjajiva, wife of Thai Prime Minister Abhisit Vejjajiva Speaking at the Elizabeth Garrett Anderson Language School in Islington the First Lady said: 'I am an example of what is possible when girls from the very beginning of their lives are loved and nurtured by people around them.
Stage presence: Michelle Obama chats to fellow G20 spouses today including Chikako Aso, wife of Japanese Prime Minister Taro Aso, Laureen Harper, wife of Canadian Prime Minister Stephen Harper and Gursharan Kaur, wife of Indian Prime Minister Manmohan Singh The 44-year- old mother of five said last night that she expected Mrs Obama to keep her distance.