The 27-year-old was caught on camera apparently swearing at Murray's semi-final opponent Tomas Berdych's team.
Murray had defended Sears, saying: "In the heat of the moment, you can say stuff that you regret."
But Sears made light of the issue for the final against Novak Djokovic.
Andy Murray's fiancee Kim Sears laughed off the controversy over her colourful language in Melbourne by wearing a 'Parental Advisory: Explicit Content' T-shirt to the Australian Open final.