Kristin Cavallari shares sons Camden, 10,

and Jaxon, 8, plus daughter Saylor, 6, with ex-husband Jay Cutler

Kristin Cavallari is getting real about her post-baby body.

During a Q&A session Tuesday on The Hills alum's 

Instagram Stories, one of her followers asked, 

Are your boobs real? 

They look amazing! (Jealous mom of 2 here)."

Cavallari — who shares sons Camden, 10, and Jaxon, 8 

plus daughter Saylor, 6, with ex-husband Jay Cutler  

responded, "Gonna keep it real with y'all: got a lift after breast feeding all 3 kids."