Duchess Kate is glowing Royal Mum

Britain's Catherine, the Duchess of Cambridge, leaves the Tusk Conservation Awards at The Royal Society in London, September 12, 2013. (REUTERS)

Britain's Prince William, the Duke of Cambridge and his wife Catherine, the Duchess of Cambridge, leave the Tusk Conservation Awards at The Royal Society in London, September 12, 2013. (REUTERS)

Britain's Catherine, the Duchess of Cambridge, leaves the Tusk Conservation Awards at The Royal Society in London, September 12, 2013. (REUTERS)

Britain's Prince William, the Duke of Cambridge, and his wife Catherine, the Duchess of Cambridge, attend the Tusk Conservation Awards at The Royal Society in London, September 12, 2013. (REUTERS)

Britain's Prince William, the Duke of Cambridge, and his wife Catherine, the Duchess of Cambridge, attend the Tusk Conservation Awards at The Royal Society in London, September 12, 2013. (REUTERS)

Britain's Prince William, the Duke of Cambridge, and his wife Catherine, the Duchess of Cambridge, arrive to attend the Tusk Conservation Awards at The Royal Society in London, September 12, 2013. (REUTERS)

Britain's Prince William, the Duke of Cambridge, presents the first Tusk Conservation Award to Tom Lalalmpaa, wearing his traditional Samburu dress, from the Northern Rangeland Trust of Northern Kenya, at The Royal Society in London, September 12, 2013. (REUTERS)

Catherine, the Duchess of Cambridge, applauds her husband Britain's Prince William, the Duke of Cambridge, following his speech at the Tusk Conservation Awards at The Royal Society in London, September 12, 2013. (REUTERS)

Britain's Prince William, the Duke of Cambridge, and his wife Catherine, the Duchess of Cambridge, arrive to attend the Tusk Conservation Awards at The Royal Society in London, September 12, 2013. (REUTERS)

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