Though Kristin Cavallari’s three kids — sons Camden, 11, and Jaxon, 9, plus daughter Saylor, 8, whom she shares with ex Jay Cutler — are not young children anymore, the reality star, 37, is now thinking about her future with her younger boyfriend, Mark Estes, 24. “The one thing, I’m not actively thinking about it, is, you know, he wants to have a kid. I’m mulling it over,” she shared on the Tuesday, April 2, episode of her “Let’s Be Honest With Kristin Cavallari” podcast. “If he ends up really being the one, I would have a kid.” “Yeah, I have to. It’s become pretty serious, this relationship, …
