A candid moment betweenQueen Elizabethand Princess Anne in front of President Donald Trump and First LadyMelania Trumpis resulting in some raised eyebrows.

A video fromTuesday evening’sBuckingham Palace reception, which marked 70 years of NATO, shows a now-viral interaction between the 93-year-old monarch and her only daughter. In the clip, the Queen shakes hands with President Trump and the first lady, then looks to Princess Anne, who shrugs — and many called it a “disagreement” between the mother and daughter or a snub to the American president.

Low explained thatQueen Elizabethturned to Anne to see which world leader was next to be greeted. However, the Trumps were last, so Princess Anne raised her hands in the air, laughed and said: “It’s just me.” She then added, “And this lot,” motioning to the members of the royal household behind her.

Geoff Pugh - WPA Pool/Getty

Princess Anne, Queen Elizabeth

“This excellent bit of sleuthing comes from the very wonderful Laura Elston of the Press Association, who is as impartial a witness as you could hope for,” Low added on Twitter.

Queen Elizabeth and NATO leaders.YUI MOK/POOL/AFP via Getty

NATO heads

President Trump sat next to Prince Charles, who hosted the Trumps for tea earlier in the day, during a photo-op with the rest of the NATO leaders in attendance.

Kate Middletonwas also in attendance without her husbandPrince William, who is wrapping up a four-day royal tour of Kuwait and Oman.

Kate Middleton.

Kate Middleton

Multiple sources tell PEOPLE that they have observed agrowing confidence in Princess Kate, 37. While raising her three children withPrince William, she has found passion and purpose in helping mothers and children everywhere. “She is finding her voice,” says a well-placed palace source.

Buckingham Palace reception

Can’t get enough ofPEOPLE‘s Royals coverage?Sign up for our free Royals newsletterto get the latest updates onKate Middleton,Meghan Markleand more!

Two royal family members who are also not in attendance areMeghan MarkleandPrince Harry.The Duke and Duchess of Sussex are missing the event as it falls during their “family time” off from royal duties. The new parents previously revealed that they would betaking about six weeks offtowards the end of the year amid their concerns that theintense scrutinythey’ve faced has been tough on the couple.

source: people.com