Photo: David M. Benett/Getty

Princess Beatrice of York (L) and Sarah Ferguson, Duchess of York

Sarah Fergusonhas a sweet name for her granddaughterSienna Elizabeth!

“What is it like to be a grandmother? Talk us through that,” moderator Samantha Barry asked.

“I love seeing my girls, who are exceptional. Full stop, they’re exceptional,” Sarah said of Beatrice, 34, andPrincess Eugenie, who shares sonAugust Philip Hawke, 2, with husbandJack Brooksbank.

Princess Beatrice, Sarah Ferguson and Princess Eugenie.Sarah Ferguson Instagram

Sarah Ferguson Rollout

“Princess Eugenieand Mr. Jack Brooksbank are pleased to announce they are expecting their second child this summer,” the palace said in the announcement. “The family are delighted and August is very much looking forward to being a big brother.”

The Duchess celebrated the news of Eugenie’s pregnancy with anInstagram tribute, where she similarly shared a nickname for her younger daughter’s son.

David M. Benett/Dave Benett/Getty, Sarah Ferguson/instagram

Sarah Ferguson

“You will be sharing puddles, Augie!” Fergie wrote alongside a photo of her grandson playing in a puddle while wearing a yellow raincoat. “Superb news, Granny heaven…. So deeply grateful.”

The Duchesstells PEOPLEexclusively in this week’s issue that she’s savoring life with her grandchildren, who “just follow me around like Peter Pan.”

“I’m ‘Super Gran Pan!’ " she says, adding that the little ones “think I’m very funny.”

Sarah Ferguson.Zoe McConnell

Sarah Ferguson Rollout

Can’t get enough ofPEOPLE’s Royals coverage?Sign up for our free Royals newsletterto get the latest updates onKate Middleton,Meghan Markleand more!

Becoming a grandmother came naturally to the longtime children’s book author, whose bestsellingBudgie the Little Helicopter series became a popular animated show and whose enduringLittle Redcharacter also inspired a series of books. She also hosts a YouTube series for children,Storytime with Fergie and Friends.

“Everyone says, ‘Oh, has it changed your life?’ And I go, ‘No, because I live [in the mindset of ] 3- to 6-year-olds.’ So I’ve now got another audience that likes me,” Sarah says.

source: people.com