Budget Car Rental's newest Common Projects Shoes Sale

Jessica Simpson and Eric Johnson Kevin Mazur / WireImage

By the looks of their steamy and silly social media, Simpson and Johnson, 36, make plenty of time for each other, but bonding with their children ' Maxwell Drew, Common Projects Sale 3, and Ace Knute, 2 ' is also a top priority. And hitting the road can be a great way to make that happen.

"Growing up, some of my best memories are road trips," says Simpson, who was recently named Budget Car Rental's newest Common Projects Shoes Sale brand ambassador. "Somehow I always got lucky on the way to my nanny's house and I would get a lotto ticket and I would win. Even if it's a dollar, I still would always win!"

The fashion designer, who stars in Budget's new ad campaign, adds: "Now when we go on road trips I'm always like, 'Hey, Eric. We have to buy a lotto ticket! I bet we'll win!'"

For more on Jessica Simpson's life as a mogul mom, pick up the latest issue Common Projects Sale Online of PEOPLE, on newsstands Friday.