Hilary Duff is getting real about the fears she feels in her marriage to Matthew Koma. "I always think Matt's going to leave me for some coolio indie songwriter that he works with," Duff, 38, told Rolling Stone in a profile published Thursday, February 19, when asked about her marriage. Koma, however, was quick to debunk Duff's theory. "Which is so insane," replied Koma, also 38. "But also very real. Those are real things to get hung up on emotionally.