Writing on a parenting forum, the mum said she thought the decision for Prince Harry and Meghan Markle's wedding to take place in Spring is not fair for Prince William's wife, as Kate Middleton's due date to give birth is in April.
"When Meghan walked past she said the same thing".
"It is such an honour to see the royals", Ms Nurzhubalina said.
Just a few days after announcing their engagement, the couple were carrying out their first joint royal engagement.
Harry has spent a significant amount of time in the city both publicly and privately since he first met with young people there in 2013 when he was exploring issues around youth violence.
'If she has Hyperemesis Gravidarum that lasts till term she really won't enjoy the day, I remember one heavily pregnant Mum when I got married going home in the end to rest she was struggling that much'.
It will be the first of many such engagements that Markle will undertake: On Friday she carried out her duties with enthusiasm, gripping the hands of cheering crowds as they lined the short route.
The couple, who will be married at St George's Chapel, Windsor Castle, next May, are planning to tour the United Kingdom in the six months leading up to their wedding so the former actress can get to know her new home.
Crowds gather outside the Nottingham Contemporary in Nottingham, ahead of a visit by Prince Harry and Meghan Markle to a Terrence Higgins Trust World AIDS Day charity fair on their first official engagement together.
Her outfit perfectly co-ordinated with Prince Harry's - he wore a smart navy coat and cream scarf. She's always been close to Harry, so I assume she'd want to take part and have a time similar to her wedding, partying till the small hours, ' she wrote.
With no private secretary yet, she had to hold the flowers and her handbag in the same hand but carried on greeting well-wishers.
Braving the chilly weather without gloves during a walkabout in Nottingham, Ms Markle's sparkling diamond engagement ring, designed by Harry, was on show.
While the monarch is famed for her classic handbags, and rarely seen in public without one, the Duchess of Cambridge rarely does so on official visits.
Harry and Meghan made their way down the lines of excited fans, with the Hollywood star appearing to be a natural as royal watchers desperately tried to get her attention.
She brushed her long hair from her face and smiled broadly as she shook hand after hand.