Kristin Cavallari Says Son, 10, Is Curious About Boyfriend Mark Estes' TikToks: 'Pretty Hilarious' (Exclusive)

Cavallari is mom to sons Camden, 12, and Jaxon, as well as daughter Saylor, 8, whom she shares with ex Jay Cutler

Kristin Cavallari's sons are getting along well with her boyfriend Mark Estes – and they've taken an interest in his TikToks.

Chatting with PEOPLE about her new partnership with KIND Kids soft-baked bars ahead of the back-to-school season, Cavallari, 37, shares with PEOPLE that her son Jaxon, 10, has started to become interested in the videos her 24-year-old boyfriend makes videos on TikTok.

Estes, who is one member of the TikTok group Montana Boyz, has been linked to Cavallari since February 2024.

"Luckily, Mark loves my kids, and my kids love Mark," Cavallari says of introducing her boyfriend to her three kids — sons Camden, 12, and Jaxon, as well as daughter Saylor, 8, whom she shares with ex Jay Cutler.

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Related: Kristin Cavallari Reveals Why She Threw Out a Necklace Her Best Friend Gifted Her Daughter: 'A Little Crazy'

"And it's been a really easy transition and I'm really thankful for that. Maybe enough time had passed, I don't know, but it's just been really easy, so I couldn't be happier about it," the proud mom says.

As Estes has gotten to know Cavallari's kids, one of the former reality TV star's sons has begun asking questions about the TikToker.

"The other night I was making dinner and Jaxon was sitting at the kitchen counter with Mark going through the Montana Boyz's TikTok, like, 'Oh, what were you doing here? Whose idea was this?' Just wanting to know the whole back story of all of them." Cavallari shares. "It was pretty hilarious."

In May, the proud mom celebrated her middle child turning 10 by sharing an adorable throwback photo to her Instagram Stories in honor of the birthday boy.

"Happy birthday to my baby bull, Jaxy!" Cavallari wrote atop her snapshot showing a sweet moment between her and her then-toddler son, sharing a smooch.

"I love you to the moon my sweet man," Cavallari added.

After she debuted her new relationship with Estes in February, a source told PEOPLE that Cavallari's kids "are No. 1 no matter what."

"She will pass on projects because she wants to be with them and she doesn’t have nannies 24/7,” the insider added, noting that Cavallari is “mostly in Nashville” these days.

“She has a very tight group of girlfriends and they have mom time. She purposefully keeps her circle very small now," the source said.

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