A few years ago, best friends Catherine Belknap and Natalie Telfer—aka Cat and Nat–decided to dish on what life was really like being a mom. Their funny videos became a huge hit with parents around the world, and their first book was born. Cat and Nat’s Mom Truths has become a lifeline for parents who feel alone in balancing motherhood, career, body image and more. Now they are back with a second book, Cat and Nat’s Mom Secrets: Coffee-Fueled Confessions From the Mom Trenches. They recently stopped by The Marilyn Denis Show to chat about what it was like to write their deeply personal stories and share them with the world. Watch the full interview in the video clip above