The royal mum, who was elegant in a Diane von Furstenberg black dress with lace sleeves, left Prince George, 4, and Princess Charlotte, 2, snuggled up for night in nearby Apartment 1a to spend time at a pre-dinner reception with families who have benefited from the organisation. The AFNCCF works to help those who find themselves in vulnerable situations battling mental health challenges.
Kate greeted her guests as she made her way around the room in her floor-length dress, which showed off a hint of a baby bump.
Kate recently returned to her royal duties after suffering from severe morning sickness during the first months of her pregnancy.
The royal is a longtime supporter of the Anna Freud Centre. In January, she visited their Early Years Parenting unit that supports families who have children under 5 years old.
“She knew exactly what these mums were talking about — about children not sleeping and how stressful it is to try and bring up small children,” Peter Fonagy, chief executive of the charity, told PEOPLE at the time. “All the mums said how much she talked to them as just another mum.”
This article originally appeared on PEOPLE