A December Bride, a Hallmark Channel movie premiering this month as part of the cable network’s “Christmas Countdown” series, is the second film to be adapted from stories by Christian author Denise Hunter. She and her husband, Kevin, make a brief appearance in the film. The author of 30 novels and novellas, Hunter sees Christian fiction reaching a broader audience because mainstream romance novels have gone too far toward steamy sex. “A lot of regular romance readers are turning to Christian fiction to fill the void,” she says.