Charlie and the Chocolate Factory
These two very old people are the father and mother of Mr. Bucket (1.1).
Charlie felt it worst of all. And although his father and mother often went without their own share of lunch or supper so that they could give it to him, it still wasn't nearly enough for a growing boy. (1.14)
But as soon as they heard the door opening, and heard Charlie's voice saying, "Good evening, Grandpa Joe and Grandpa Josephine, and Grandpa George and Grandma Georgina," then all four of them would suddenly sit up, and their old wrinkled faces would light up with smiles of pleasure. (2.2)