Hilary Duff and husband Matthew Koma are a bonafide "unit"- but once a year, the power couple gets into a drag-out, explosive fight. "Everyone's like, 'How is it working with your husband? Do you guys fight a lot?'" Duff, 38, told Dakota Fanning while chatting with her for Interview's Monday, February 23, story. "I'm like, 'We literally never fight.'" After Fanning, a good friend of the couple, said, "Yeah, you guys never really fight," Duff clarified that things can get scrappy between her and Koma, 38, whom she wed in 2019. "Well, that's not true.