Kristin Cavallari used her new official app to share the first-ever picture of her 2-month-old son Jax. The former Laguna Beach star shared the snap in a blog post titled "Family Time," which also included sweet pictures of visiting a zoo for the first time with her eldest son Camden, who is 22 months. "This year we took Camden to the zoo for the first time, I cooked up a storm, we had family in and out, and most importantly we adjusted to now being a family of four with baby Jax," Kristin wrote. She then shared a picture of her "little peanut." Kristin and her NFL star husband, Jay Cutler, welcomed Jax back in May. They announced the news on Instagram, with Kristin sharing a picture of baby booties and a little hat.