On June 12, the Total Bellas star shared a pic of Artem with the couple's son Matteo, along with a lengthy caption celebrating the Dancing With the Stars pro's 39th birthday.
"Happy Birthday @theartemc! You are truly the world's greatest Dada," Nikki wrote. "You are the kindest soul I have ever met, everyone feels it and says it when they come in contact with you."
Nikki, who previously dated John Cena for many years before the couple ended their engagement in 2018, struck up a relationship with Artem in 2019 after the two met while being partnered up on season 25 of Dancing With the Stars. The couple got engaged just months later in November 2019.
"You are the best thing that has ever happened to me," Artem wrote in an Instagram post about their engagement in January 2020. "So excited for what's to come I love you more than anything and thank you for saying Yes."
Months later, the two welcomed Matteo in August 2020.
Nikki continued her birthday post to Artem by applauding her fiancé's "drive, passion and love when it comes to dancing and cooking."
"I just love how your eyes light up when we talk about construction, remodeling, fishing, choreography or motorcycles lol And I love how you love our Matteo. It melts me," she shared. "As well as when you come up behind me in the kitchen to twirl me or dip me. You and your dance moves are a one of a kind. I'm lucky you call me yours. And that I'm your favorite lunch date. (for some reason in our relationship this means I Love You lol.)"
She concluded the post with, "Happy Birthday Papi! Can't wait to celebrate a year older with you! Muchos besos! Te amo mucho!!"
This isn't the only time that Nikki has put her love for Artem on display on social media. Back in April, she shared a video to Instagram of the two slow dancing in their kitchen, along with the caption, "I just made @theartemc reenact this because we were just listening to Billie Holiday and he grabbed me to dance and then in the middle of the dance he did exactly that! Flipped our food in the pan lol Goodness he's so cute! So him! Lol."