The 33-year-old country singer usually stays away from putting Isaiah in the spotlight, but on the rare occasion that she does post a pic, she can’t help but gush over his cuteness. On Mother's Day, the singer shared another adorable picture of her angel with a simple and sweet message as the caption.
"Plans for today: snuggle with this handsome guy. That is all. Pretty sure it's going to be a great day! #happymothersday," she wrote alongside the playful pic.
While Underwood is protective over her son getting too much social media exposure, she’s not afraid to gush about her husband, Mike Fisher, who she just celebrated her sixth wedding anniversary with on July 10.
"Six years ago today, I said 'I do,' to this handsome fella. I meant it then and I mean it now. God put us together and continues to bless our marriage," Underwood captioned a photo of the two lovebirds on a romantic getaway in Cabo San Lucas, Mexico in early July.
"I couldn't imagine this life without you, @mfisher1212 I am thankful for these past six years together (and, of course, for our beautiful son, Isaiah) and I look forward to spending the rest of our lives in love," she added.
See more from the couple's trip to Mexico in the video below.