Snowed in at a Weasley Gathering

Dudley Dursely was invited to a holiday dinner at the Weasley by his cousin Harry. Will he be able to show these people that he has changed? Or will he forever be thought of as the bigot his parents made him into in his youth? Written for both Marauder Map Madness, and Fortnightly Challenge Thread's Fibonacci Sequence on Hogwarts School of Witchcraft and Wizardry.