Despite Harry and Ron going back to to Number Four Privet Drive, despite Dudley's attempts to make up for the past, Harry is reluctant to reconcile, and after he leaves without even making sure Ron is with him, Ron sees how distraught Dudley is, that he really wanted to make amends, and the two of them bond.
Dudley has a secret, and it's time he told his father about it. Will Vernon be understanding, or will Dudley be treat like his cousin was for his differences?