She carried a green clutch and wore green stilettos.
McDonald, 48, explained that when she was eight months pregnant with her second child, she constantly touched her bump - something for which Markle has been criticized and teased.
She added, "My sister was in her class, so they were the same age".
Kate, who wore a Gucci blouse and pants by Jigsaw, was also taken with Kameron Batta, aged nine months, and held out her hands as he tried to walk from his mother Kriti Batta, 35, when the parents gathered together to have a chat.
The friend also told DailyMail.com that Meghan has been left baffled by her family's constant calls for her to spend more time with them, saying that she has always been short of time for reunions with relations due to her busy schedule.
Meghan, 37, and Harry, 34, are now gearing up to move from Kensington Palace in London to Frogmore Cottage in Windsor, where they will raise their little one.
Samantha in particular has repeatedly called on Meghan to spend more time with their father, telling DailyMailTV last month that she should have visited him while in the USA for her NY baby shower.
Once outside, while teetering gingerly on her high heels and gripping Harry's arm for balance, Meghan was given flowers by two Ottawa-born children whose parents work at Canada House.
Meghan's right-hand woman Amy Pickerill recently handed over her resignation letter.
In the letter, Meghan said her heart had been "broken into a million pieces" by his continued media forays and accused her father of lying about being cut out of her life. It was also in Toronto that Meghan and Harry made their first public appearance at the Invictus Games in 2017.
Laura McFarlane, director of Leap, joined Kate and others in a discussion about the project and said afterwards: "It really is very important the fact that Kate has come to see at very close hand how we actually support parents in terms of developing stronger relationships with their children". There were constant rumors previous year about the two women hating one another.
In her children's absence, Prince William's wife beamed with joy as she met some of the tiny tots.
Barr's surprising reversal lets Vikings keep key piece
The one big advantage the Vikings likely had in their negotiations is the fact that Barr is familiar with their defense. Pro Football Focus ranked Barr as their third highest rated free agent linebacker after Jordan Hicks and C.J.