"Where'd you pick up your love of football?"
Now she smiled, grateful that he'd changed the subject, even a little. "That was all Aunt Tab. Her husband was a faithful Chiefs fan even back when they were in Texas [the Dallas Texans]. His loyalty followed them to Kansas City. Lasted 'til the day he died." Her smile deepened. "Aunt Tab kept up the tradition and it just kinda got passed down to us. I wish I could have met him. I think we would have been like peas and carrots. She always said I carried a bit of his ghost because we were entirely too much alike."
"How long were you with her? Must have been a long time to breed such loyalty to a team that hasn't been to the Super Bowl since--"
"Hey!" She laughed, lobbing a slice of bread at him. "A team is more than its win-loss column, you know."
"As anyone with such a shoddy win record will attest." [My research shows the Chiefs with an all-time record of 383 wins, 334 losses. Not so shoddy.]
"Jerk." Shaking her head, she shot him an assessing look. "And just who holds your loyalty, oh god of the gridiron?"
"You don't want to know."
"Oh, no. If you're a Raiders fan, you can leave right now."
I assumed the "they" in sentence 4 referred to the team, but most readers would have thought you meant Tab and her husband.
It was fine to begin with, but when someone's droning on about a football team, you probably want to get in and get out and get on to something more interesting to the readers. Like a murder.