I got this idea from a Tumblr post, so some credit goes to them.
It was the first Christmas after the Battle of Hogwarts. Everyone had come to the Burrow to celebrate: Harry, Hermione, Luna, and Neville.
Molly Weasley was cooking dinner while everyone else was out and about. George, having nothing to do, came to help.
"Mother, is there anything I can do to help?" George called.
Molly turned around, carrying a platter of assorted fruits.
"Yes, Fred, you can -" Molly stopped dead, realizing her mistake, and dropping the food, causing a loud crash.
"Oh, George, I'm sorry..." she said, her eyes glistening with tears. She dropped down to her knees to pick up the food, crying.
George kneeled beside her, helping her clean up the mess.
"Honestly woman," he whispered, a single tear running down his cheek. "You call yourself our mother?"