October 24, 2016 03:30 PM

Kristin Cavallari‘s children may all be under 5 years old, but the mom of three believes she’s already given them a strong foundation.

“Becoming a mom is really where I’ve blossomed … I finally feel like I’m where I’m supposed to be in my life,” the former star of The Hills tells PEOPLE.

Cavallari and her husband of three years, Chicago Bears quarterback Jay Cutler, are parents to daughter Saylor James, 11 months, and sons Jaxon Wyatt, 2, and Camden Jack, 4.

“I’m very comfortable with being a mom, and I’m proud of the way that we’ve raised our kids,” says the fashion designer and author, 29. “I’ve done a few controversial things apparently, but I’m so confident in my decisions and my kids are happy and healthy, and that’s all I care about.”

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As a mom of two sons and a daughter, it’s likely that at least one of her kids takes after her. In Cavallari’s words, that would be her middle child, Jaxon.

“I’m not proud of this, but my middle child, Jaxon, has been swearing,” she admits. “And I’m like, ‘Where does he get that? … Oh yeah, that’s me, I’m the culprit.”

It doesn’t stop at copycat language, though, according to his mom. “He’s a little me. And he’s tough. He’s very tough, stubborn, like, he’s going to get his way. That’s also me.”

Although Jaxon is the child who reminds Cavallari the most of herself, her youngest is the one currently serving up the most laughs for the family.

“Right now she’s feeding herself. She sits in her highchair and she just discovered that she can feed the dog,” she says. “So she literally takes her food and she throws it on the ground, and we’ll be like, ‘Saylor, no.’ And she just starts laughing.”

“She makes the biggest mess — it’s all over her, it’s all over her hands, all over her outfit, and all over the floor,” Cavallari continues. “Thank God we have the dogs for the floor, but I just take Bounty paper towels and I just wipe her down, head to toe, and we’re good.”

Cavallari confesses her biggest wish for her kids isn’t super unique, but that doesn’t mean it isn’t genuine.

“It’s corny, but I just want them to be happy,” she says. “I’m sure every parent says that, but it’s true. I just want my kids to have a happy life and be comfortable in their own skin, and go out there and do whatever it is that they want.”

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