“Me and my little man #lifeisgood,” the Nashville Predators hockey star captioned the seriously adorable snap.
Underwood first shared a photo of their little guy two months ago, captioning an equally sweet Instagram of Isaiah holding a hockey stick with the caption: “The Predators are in the playoffs! Just waiting to get called up! #PutMeInCoach.”
Isaiah, who was born on Feb. 27, is the first child for the couple, who wed in 2010, and the American Idol alum couldn’t be happier to be a mom.
“HAPPY BIRTHDAY TO ME! My 1st present = late night date with a tiny semi-bald chubby dude who likes to grunt & cry & pass gas! #bestgiftever,” she tweeted after turning 32 on March 10, giving her little “chubby dude” a shoutout.