Kristin Cavallari Snaps Baby Bump Selfie at the Gym
01/19/2014 AT 05:00 PM EST
The reality star-turned-designer, 27, who's expecting her second child with husband Jay Cutler – took to Instagram on Saturday to show off more than her fit form – check out that baby bump!
"Gym selfie," she writes. "Baby bump getting big!" (Check out her "healthie" below.)
Since debuting her baby belly in November, she's kept mum on whether son Camden, 17 months, will be joined by a little brother or sister.
"It's harder because I'm tired, and then I still have to be a mom to Camden," she told PEOPLE of her pregnancy. "But it is easier in the sense that I know what to expect."