She should never have opened her mouth on this subject!

Kristin Cavallari appeared on Watch What Happens Live on Tuesday night, and host Andy Cohen asked the reality star to elaborate on the comments she made about choosing not to vaccinate son Camden during a Fox and Friends interview on March 14.

"At the end of the day, I’m just a mom. I’m trying to make the best decision for my kid. There are very scary statistics out there regarding what is in vaccines… and what they cause. Asthma, allergies, ear infections, all kinds of things. We feel like we’re making the best decision for our kids," she explained.

We never thought we'd see the day when K-Cav was discussing her stance on parenting rather than her preferences for peplum tops!