Nicky is mom to three kids and Paris recently welcomed her second baby.

Paris Hilton and Nicky Hilton Rothschild attend the Stella McCartney show during Paris Fashion Week Womenswear Spring/Summer 2024 on October 2, 2023 in Paris, France.

Nicky and Paris Hilton at Paris Fashion Week. PHOTO: DAVE BENETT/GETTY

Nicky Hilton Rothschild is finding a new way to bond with sister Paris Hilton.

While chatting with PEOPLE at the Flamingo Estate x Mytheresa Holiday House party, the entrepreneur mom, 40, opened up about her relationship with her sister Paris, 42, admitting that their bond has changed since they both became moms.

“I mean, usually around this time of the year we’re trying to figure out what we should do for New Year’s Eve, should we go to Vegas? But this year we’re talking about doing a trip with all the children,” Nicky tells PEOPLE.

Nicky is mom to three kids — daughters Lily-Grace Victoria, 6, and Theodora “Teddy” Marilyn, 5, and her son, whose name she has not yet revealed — whom she shares with husband James Rothschild. Paris shares her two kids — son Phoenix, 10 months, and newborn daughter London — with husband Carter Reum.

For Halloween this year, Nicky shared photos of her kids celebrating the holiday on Instagram. In one photo, her son — born in July 2022— sat studying some treats in his hands carefully while dressed as Mickey Mouse.

Paris and Nicky Hilton regret 'Sex and the City' no-show - Yahoo Sports

In May, Nicky shared a special moment with her daughters, enjoying one of Taylor Swift’s three sold-out shows at MetLife Stadium.

“Witnessing the pure joy in their eyes as they experience their very first concert. 🥹💕🎸🎤🎶💖,” she captioned the post.

In the video, Teddy could be seen wearing a rhinestone dress and cat ears while watching Swift perform.

In March, Nicky spoke with PEOPLE about balancing her life as a fashion designer and a mother. She said during the interview that she’s savoring the years that she can select the outfits for her children.

“Balancing my kids with my fashion design business is a never-ending battle,” the devoted mom said. “But it’s important to set the right example for the children from the beginning.”

“My daughters like the colors pink and purple now, and they are girly girls in the sense that they love fashion and dressing up,” she said.

“My youngest daughter used to tell me that her favorite color was gray. Thankfully that has changed!”