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Hot mama!

Kristin Cavallari is currently pregnant with her second child, but she certainly didn't look it in the family snapshot she posted to Instagram!

"Been having a beautiful, relaxing family va-cay. Thanks @mikoh_ for the perfect preggers bathing suit," she captioned the photo of her walking with husband Jay Cutler and son Camden.

The couple are expecting a second son, so K-Cav better be ready to be outnumbered in her household!