The Cambridges returned to the UK in time for Mother's Day, which was established today in the UK.

And while the Duke and Duchess of Cambridge are now reunited with their children, Prince George, Princess Charlotte, and Prince Louis, even when they were in the Caribbean last week, it seems that William and Kate's trio was on their minds.

To deal with jet lag, the eternal enemy of world travelers, Kate was in the Royal Suite at the San Ignacio Hotel in Belize at 4 a.m. talking on WhatsApp and arranging playdates for the kids, royal expert Rebecca of the Daily Mail English reported.

"For the Duchess of Cambridge, motherhood never ends," English writes. So when Kate's jet lag kicked in during this week's Caribbean tour and she saw her waking up in the middle of the night, she "tap-tap-tap-tapped" her WhatsApp messages, from George's soccer game to Charlotte's ballet lesson to Louis' bedtime routine back in England, I'm told she spent time organizing everything."

English wrote that the Cambridges "try to time the departure and arrival times of the royal tour to coincide with the time they kiss their children goodnight and give them breakfast." Tonight's flight on the RAF Voyager will be in time for tomorrow's Mother's Day brunch."

This is a new way of balancing being a working royal and a parent, "something the couple has cultivated by learning lessons from the past," English said. The Queen herself first visited Jamaica in 1953, as part of a Commonwealth tour, and was away from her young family for as long as six months. (Her son Prince Charles was born in 1948, and her daughter Princess Anne in 1950.)

"Even though the Cambridges had vowed never to travel more than a week while their children were young, even, or perhaps especially, during a tour thousands of miles from home," English wrote, "home life called.