Mr. Hughes was the late father of Hogarth and the late husband of Annie Hughes. He was a Air Force Pilot. His death is unknown but it's implied he was killed in action. He was never in the film, although there is a photo of him in Hogarth's bedroom. He is mentioned by Hogarth Hughes
Although Hogarth's father was never mentioned throughout the final film, but in a scrapped introduction of Hogarth and Annie scene, Annie mentions to Hogarth that he laughs just like his father and Hogarth tells Annie that he misses him.