The Hills Kristin Cavallari "completely done" having kids, won't let them star on reality TV until age 18 06/22/2017 Kristin Cavallari's job as a mom will never end, but she's definitely not looking to get pregnant again. Read More RELATED NEWS Kristin Cavallari debuts new 24-year-old boyfriend Mark EstesBrody Jenner and Tia Blanco welcome their first child'The Hills' alum Brody Jenner engaged to pregnant girlfriend Tiarah "Tia" Blanco TAGS: Dancing with the Stars Laguna Beach Mark Ballas Kristin Cavallari Lauren Conrad Audrina Patridge Heidi Montag Whitney Port Jay Cutler