Meanwhile, Michelle - who has Sasha, 19, and Malia, 22, with Barack, who she wed in 1992 - previously opened up about the ups and downs of motherhood.
She said: "Motherhood has taught me that, most of the time, my job is to give them the space to explore and develop into the people they want to be. Not who I want them to be or who I wish I was at that age, but who they are, deep inside. Motherhood has also taught me that my job is not to bulldoze a path for them in an effort to eliminate all possible adversity.
But instead, I need to be a safe and consistent place for them to land when they inevitably fail; and to show them, again and again, how to get up on their own ... When Malia and Sasha were newborns, Barack and I could lose hours just watching them sleep. We loved to listen to the little sounds they'd make – especially the way they cooed when they were deep into dreaming. Don't get me wrong, early parenthood is exhausting ... But there is something so magical about having a baby in the house. Time expands and contracts; each moment holds its own little eternity."