And, despite being married to two of the most influential men on the planet and being rather smartly dressed for a simple cup of tea, they could have been friendly neighbours meeting up for some girl talk.
The US first lady probably had some admiring comments about the minimalist kitchen, complete with sparkling stainless steel fittings, which was installed specially for the Camerons in line with design expert Samantha's tastes.
She dropped in to see Samantha after a full ceremonial welcome in the gardens of Buckingham Palace, presided over by the Queen.
In the inner sanctum at Number 11, Downing Street, where the Prime Minister and his wife live with their family because its more spacious than Number 10
There were kisses and hugs as the Obamas greeted their British hosts like old friends
Samantha Cameron looked chic in an outfit by Peter Pilotto while Michelle Obama scored a fashion triumph in a cobalt coat by Narciso Rodriguez and dress by Roksanda Ilincic
Samantha and Michelle were due to hold a barbecue for military families in the gardens of Number 10 on Wednesday
The two leaders teamed up to take on teenagers at Globe Academy in South London in a game of pong pong
The match clearly brought out their competitive spirits as they high-fived on scoring a point
All down the Mall, Union Jacks and Stars and Stripes flags were flown in honour of the state visit and the special relationship
Earlier, the US presidential couple had been welcomed at the entrance to Buckingham Palace by the Queen and Prince Philip
Her Majesty shows the Obamas exhibits during a tour of the Queen's gallery, with artefacts including a collection of letters from American presidents to British sovereigns
The party laughed gamely as they struggled with high winds during a full ceremonial welcome in the gardens of the palace
They were greeted by a sight that has struck fear into the hearts of Britain's enemies for centuries: the Band, Pipes and Drums of 1st Battalion Scots Guards
Prince Phillip invited Mr Obama to inspect the guard while their wives looked on from the steps
A more sombre moment during the visit with a trip to Westminster Abbey
Like all visiting heads of state, the president laid a wreath at the Tomb of the Unknown Warrior
Talking to choirboys, he said he hoped on his next trip to be allowed to come and sing in the Abbey