Kristin Cavallari is doing the near-impossible: parenting three kids under the age of four.
Thankfully, the 29-year-old former reality star isn't doing it alone and, when ET's Katie Krause caught up with Cavallari at the re-launch celebration of her jewelry line, Emerald Duv, in West Hollywood, she revealed whether she or husband Jay Cutler is the "bad cop."
"Jay would probably say that I'm the good cop and he's the bad cop," she said. "Although, when he's not there, I mean, listen...The kids are not walking all over me. I know how to set boundaries. I know how to get them in check."
EXCLUSIVE: Kristin Cavallari Posts 'Glamorous' Breast Pumping Pic, Says She Can't Wait to Get Rid of It
The couple has two sons together, Camden, 3, and Jaxon, 1, and welcomed their first daughter, Saylor, in November. Cavallari broke down her and Jay's differing parenting styles for us.
"Camden, my oldest, is an amazing kid. He listens so well...Saylor's the happiest, easiest baby. It's Jaxon, our middle child, that is our wild child rebel," she explained. "I'm more along the lines of like, 'You know what? He's a kid. He's making a little bit of a mess. It's all good.' And then he'll clean it up. Jay is sort of, like, he doesn't want the mess to begin with."
Meanwhile, she said baby Saylor is starting to make noises, but hasn't said her first word just yet. "She's been rolling over for a while now. I feel like she'll probably be crawling during the next month and a half or so. So, that's very exciting," she shared. "But Jay does want it to be like, "Say 'Dadda', say 'Dadda!'"
And the family of five will stay just that, if Cavallari has her way.
"We feel like a very complete, whole family," she said. "Now that we've got our girl too, it's nice. She's sort of shifted the balance in our house and the energy has really changed and it's a really nice feeling. She's been very calming for everybody."
EXCLUSIVE: Kristin Cavallari 'Really Happy' About Ex Brody Jenner's Engagement
Though Cavallari dabbles in many different careers -- including the jewelry line and her recently-released memoir, Balancing in Heels: My Journey to Health, Happiness, and Making it all Work -- she claimed that, for the most part, she's a stay-at-home mom.
"I cook dinner almost every night and I'm taking my kids to school. I'm going to the grocery store. I'm making dinner, doing all of that," she said of balancing home and work commitments. "When I need to, I can make time to focus on the jewelry or the shoes or whatever it may be."
Just don't expect the former Laguna Beach star to merge the two worlds -- she absolutely does not want to do a reality show with her family.
"No! We get offered it all the time," Cavallari objected. "We want our kids to live as normal a life as possible."
ET recently sat down with Cavallari and discussed how she and Cutler make their marriage work. Find out what she had to say in the video below.