In a video Stefani posted on Instagram on Tuesday (May 26), the country singer is seen showering Kingston with kisses. The 14-year-old smiles before escaping and wiping his face.
"happy b day kingking gx @blakeshelton," Stefani captioned the post.
"happy 14th bday to my first born son- thank u God for marking me HIS MAMMA GX #loveukingstonjames, she wrote in the caption.
Stefani's son Kingston is the oldest of her three kids. She's also the proud mother to 11-year-old Zuma and 6-year-old Apollo. She shares all three with her ex-husband, Gavin Rossdale. Stefani and her kids are currently quarantined on Shelton's Oklahoma ranch.
Shelton and Stefani met in 2015 on the set of The Voice and started dating shortly after. The couple recently released a duet together, "Nobody But You," from Shelton's Fully Loaded: God's Country.
"This was one of those songs where the more I heard it, the more I fell in love with it," Shelton said. "I also realized how important it is for me and where I am in my life, and I think that's why [writer] Shane [McAnally] was trying to get it to me."
"It fits my story," he added. "I was about to go in and record when I decided that it needed Gwen on it- because it is our song. I think it's magic."
"Nobody But You" marks Shelton's 27th career No. 1 country single and is Stefani's first No. 1 country single. She recently made her Grand Ole Opry debut performing the song alongside Shelton live from Oklahoma.
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