How does the author use foreshadowing in The Difference?

At first, George responds to his wife's mention of his affair in a stereotypical manner. He makes excuses, tacitly blaming his wife, and denying any emotional attachment to his mistress. When he sees that his justification is making little effect on his wife, his actions turn to the ridiculous, as foreshadowed by the narrative voice which remarks that "his face cleared [of gloomy severity] as if by magic."
Suddenly, George has come to the epiphany that Margaret is upset because she is tired and hungry. "You must try to eat a good dinner," he says, and then lifts her in his arms to take her to the dining room. The implication is clearly that once Margaret has a full belly, her head will clear of all this nonsense. The final scene strikes a true note of humor, as the reader envisions Margaret lying deathlike in the arms of her husband, listlessly gazing out the window at the falling leaves.