Her three children were involved with the royal wedding, with her daughter Ivy acting as a bridesmaid.
Mr van der Stroom said: "He [Prince Harry] said missing a mother is like missing some kind of security, how you need that as a son and it falls away when you lose your mother".
The 34-year-old prince has been spending a lot of time with Doria Ragland recently as she's been helping the couple settle into their new roles as parents following the birth of their son Archie Harrison Mountbatten-Windsor on May 6.
Kate greeted her fans during a walkabout at Bletchley Park. He said: "Yes absolutely, [I'm an] uncle, second time for me".
She went on: 'Are matching shoes too much?' Royal fans are stunned at the access Ragland is receiving that Carole Middleton certainly never enjoyed. Nicholl reports that Middleton was told not to pose for pictures or interact with the paparazzi but was given access to the royal press office and advisors for support.
"We honour and celebrate each and every one of you".
Elsewhere one royal fan commented: 'Perfect. oh those eyes.
Archie has been a topic of conversation on those visits.
Another wrote: 'I hope to London to meet Archie'.
The visit took place after Archie's father, Prince Harry, returned from a day of official engagements in Oxford, according to ABC News royal contributor Victoria Murphy. "My biggest fear was that I'd lose my family, but we've stayed close", she told The Telegraph.
The couple remembered Prince Harry's late mother Princess Diana with the caption, but also added another subtle tribute in the image.
While many in the USA may not have been aware of the close relationship that remained between the royal brothers and Princess Diana's family, it's been well-known in England that the families have remained extremely close.