The Voice coach and the 48-year-old singer, along with her sons Kingston, 11, Zuma, 9, Apollo, 3, made their way to the championship game between the New England Patriots and Philadelphia Eagles in Minneapolis, Minnesota, on Sunday.
The "Hollaback Girl" singer documented their fun football day on her Instagram Stories, sharing pictures and videos of their time together.
"Blake introduces them to these down-home country things and Gwen and the kids love it. They all love going to Oklahoma and seeing the animals and doing fun things on his giant piece of land," the source shared. "Blake is very much a father figure to her kids. The kids are very mature and Blake treats them as such. He loves them so much, he's always talking about them."
Hear more of how their relationship is sizzling in the video below.