The couple are on a two-day official visit to the French capital.
While reports had claimed Middleton was "disappointed" with Prince William's behavior, sources said that it will all blow over.
Princess Kate in Paris looks like she is more in love than ever with Prince William despite criticisms her husband received because of his "dad dancing" and controversial "all-male" ski trip last week.
William and Kate's trip will be seen as a bid to build on the UK's relationship with France ahead of the first formal stages of Brexit.
The Duke and Duchess of Cambridge have met with victims of the Paris attacks on the same day a radicalised attacker was shot dead in Orly airport.
The dinner was hosted by Her Majesty's Ambassador to France, Edward Llewellyn, at the British Embassy in Paris.
It has fueled claims from the tabloid press that the second in line to the throne does not work hard enough.
On Saturday, March 18, the couple cheered the Wales rugby team as they took on the French in the final Six Nations match at Stade de France.
Later the couple surprised tourists and art lovers at the Musee d'Orsay, the highly popular museum housed in a former railway station, by arriving for a visit that had not been announced to the public in advance.
"We think you are very strong and very courageous, you've made fantastic progress", he told her, and when she told the couple she wanted to get into the fashion industry, Kate said she'd keep an eye out for her designs.
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This fall, Prince William will join the senior ranks of the Monarchy, leaving his duties as an emergency pilot to take on royal duties full time.