Nicky Hilton Rothschild and Kathy Hilton.Photo: Michael Ostuni/Patrick McMullan via Getty Images

Nicky Hilton Rothschild and Kathy Hilton

Mum’s the word forNicky Hilton Rothschild!

“My mom’s very old-fashioned. She’s like, ‘I didn’t find out for any of you kids. Please, it’s the ultimate surprise in life, do not find out,’ " Hilton Rothschild recently toldE! News, during New York Fashion Week.

The mom of daughtersTheodora “Teddy” Marilyn, 4, andLily-Grace Victoria, 5½, also said she feels “pretty prepared,” given that she has had two children already.

“I do have to start getting the room ready,” she added.

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Hilton Rothschild and her financier husband willwelcome their third childduring the summer of 2022, her rep confirmed exclusively to PEOPLE last month.

In the photo, Hilton Rothschild posedin front of a floral wallwhile cradling her stomach. Her dress featured a sweetheart neckline adorned with jewels.

“They say the best things in life come in threes. 👶👶👶,” she wrote.

RELATED VIDEO: Pregnant Nicky Hilton Rothschild Is “Bumping Around” During New York Fashion Week — See the Pics!

While Hilton Rothschild found out thesex of her first childbefore Lily-Grace’s birth, she previously vowed to wait until the birth of her second child.

The month before Teddy’s arrival, Hilton Rothschild told PEOPLE that she and her husband had no preference on a boy or a girl, and had even decorated the nursery “all neutral.”

That didn’t mean she didn’t have preferences, though. “I didlove having a sister,” she said of her own childhood with older sisterParis Hilton.

source: people.com