She quickly set Trump straight about appropriate political conduct for White House family members, which of course is that the commander in chief's kids have no business presiding in the president's stead.
Seated at other seats nearby Ivanka Trump were German Chancellor Angela Merkel and Turkey's Recip Tayyip Erdogan.
Trump, who has previously condemned public attacks on his own daughter, went on to single-out Hillary Clinton and her daughter Chelsea, saying that the media and public would have vouched for her if she'd done the same.
A photo on Twitter shows Ivanka Trump sitting at her father's place, between Chinese Premier Xi Jinping and British Prime Minister Theresa May. Were you giving our country away? "When other leaders stepped out, their seats were also briefly filled by others".
When Clinton says that neither of her parents would think to even ask her to take their place on the world stage, she's right.
While Trump has defended Ivanka's role during the summit, the first daughter's participation during the meeting reportedly irked US allies.
I think it's more what you'd expect from a dictator really, using a family member to represent himself at an worldwide summit, than you'd expect from a democratically elected American president. "Might be the only bad thing she has going, if you want to know the truth".