Kristin Cavallari Claps Back at Criticism Over 24-Year-Old Boyfriend as She Makes Debut in His Montana Boyz TikTok

The 'Laguna Beach' alum hard-launched her romance with influencer Mark Estes earlier this week on Instagram

Kristin Cavallari is not ashamed to be dating a younger man.

Just three days after the Laguna Beach alum, 37, went Instagram official with her new boyfriend Mark Estes, she joined the 24-year-old and his friends in a TikTok video shared Friday on their joint account known as the Montana Boyz.

The clip features the TV personality and all three of the content creators — Estes, Kaleb Campbell Winterburn and Kade Wilcox — who make videos about their cowboy lifestyle and dance to country music.

The Montana Boyz appear to welcome Cavallari into their crew as they all dance and lip-sync along to Jason Aldean’s 2009 hit “She’s Country."

Related: Kristin Cavallari Met New Boyfriend on Social Media: 'He's Not Your Typical 24-Year-Old' (Exclusive)

After Campbell, Winterburn and Wilcox each make an appearance, Estes, wearing a leather letterman jacket and snapback hat, mouths the lyrics before he introduces The Hills alum by pointing to her.

Cavallari, dressed in jeans and a shirt that reads "This Ain't My First Coors Rodeo", is all smiles in the video and grooves along to the chorus of the country track. Just before the clip ends, Estes gives her a sweet hug  from behind.

The Montana Boyz also left a cheeky caption: “Brother she’s country…”

A few hours after their video was posted, Cavallari shared her own TikTok in which she responded to the criticism she's received for dating a younger man.

"When they’re all up in arms that im dating a 24 year old. Andddd?" she captioned the video, which showed her mouthing the words to a clip that said, "So what are you gonna do about it?"

When another voice responds, "We're reporting it," Cavallari continues mouthing to the clip's audio. "Are you gonna arrest me? Are you gonna give me a ticket?" she says before flashing a cheeky smile at the camera.

Related: Who Is Kristin Cavallari's Boyfriend? All About Mark Estes

Cavallari’s first appearance on her influencer boyfriend’s joint TikTok comes shortly after she revealed that the two were dating on her Instagram on Tuesday.

At the time, the fashion designer announced their relationship by sharing a selfie of the two smiling while on vacation in Los Cabos, Mexico.

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"He makes me happy 🤍" she captioned the shot, which Estes later shared on his Instagram Story with two hearts.

Related: Kristin Cavallari and Mark Estes Spotted at Cabo Airport After Sexy Vacation Where They Debuted Relationship

Estes also posted a PDA-filled TikTok from their tropical getaway. In the video, the couple sang along to the words of “(Kissed You) Good Night” by Gloriana while standing in front of an ocean-side pool. After Estes lip-synched to Cavallari, she returned the favor and he pulled her in for a kiss.

The mother of three then rolled her head back with a laugh before hopping into the former college football player’s arms. From there, Estes carried her toward the camera, his arm wrapped securely around her torso, and one hand at her lower back.

Shortly after the couple revealed that they were an item, a source told PEOPLE that they have been “dating longer than people think,” but “have kept it very private.”

“They’re serious enough now that they were ready to go public,” the source explained, mentioning that the two originally met on “social media.”

“They’re really happy together. He’s been so great to her and is just a really nice guy,” the insider added. “He’s not your typical 24 year old. She’s having a great time and is living her best life with him.”

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