Apology
Our story starts during Harry and Draco's wedding. The ceremony has taken place and now the newlyweds are going around greeting all of their guests.
Harry gasped as he stopped in front of his aunt Petunia and uncle Vernon.
Draco nudged him and smiled. "I don't believe that we have been introduced before?"
Harry muttered, "This is my aunt Petunia and uncle Vernon, Malfoy. Aunt and uncle, this is Draco Malfoy."
Draco shook their hands and said, "I think that it would be best if I left you three alone. It appears you have some issues to resolve."
Without another word, he headed towards his parents on the other side of the room.
Harry scowled at his retreating back. He turned back to his aunt and uncle and asked, "What are you doing here?"
Petunia stated, "You invited us."
Harry sighed. "I never actually expected you to turn up though. You hate me after all."
Vernon mumbled, "About that, we came here to apologise about the way we treated you growing up."
Harry laughed. "Now, that is funny."
Petunia told him, "We're being serious."
Harry inquired, "After all these years, why are you apologising at my wedding?"
Vernon admitted, "We have been meaning to for a while, but there was never a right moment until now."
Harry smirked slightly. "You never were one to choose the right moment, uncle."
Petunia frowned. "Well, do you forgive us?"
Harry grinned. "Of course I do, that's all in the past. I'm a married man now. Well, twice married with children, but that's another story."