United Kingdom, June 2 -- Kristin Cavallari doesn't regret cutting ties with her dad.

The 38-year-old star decided to stop speaking to her dad, Dennis Cavallari, after he "crossed the boundary" with her kids, and Kristin now considers the move to be "the best decision [she's] ever made".

The blonde beauty - who has Camden, 12, Jaxon, 11, and Saylor, nine, with ex-husband Jay Cutler - told People: "I mean, honestly, and this might sound messed up to some people, but it's the best decision I've ever made, cutting my dad out of my life. Such a weight has been lifted from me.

"There's not one day where I miss him. I don't know if it was two or three years ago, but I mean, I was an adult, let's say I was 35 [when I decided]. It was 35 years...