Disclaimer: Harry Potter belongs to J.K. Rowling. I make no claims to ownership.

Warning: Mention of LGBTQ; incest

Bill is pacing around the room muttering to himself. Harry can't catch all of the words, but he definitely hears, "That foul, loathsome boy who dared to touch my daughter."

Louis' face is carefully blank, but it looks like he's clinging on to his calmness by the thinnest of threads. Harry thinks they've probably all seen Bill like this at least a dozen times each, but Louis, as the only one of Bill's children to still be in school and living at home, is the most frustrated by it.

Percy checks his watch. "It'll be starting soon," he says. "Someone should go check on Victoire."

Bill immediately whirls around. "I'll go."

"No," Harry says firmly, already striding toward the door.

"I'll come, too," Louis says eagerly, leaping to his feet.

Bill glares at them both in betrayal, and Ron takes ahold of him to stop him from following them. All of the Weasley brothers are in the room to keep an eye on Bill, although George looks like he's here more to enjoy Bill's suffering.

Once out of the room, Louis begins to relax. "Uncle Harry, can I ask you something?"

"You already did," Harry quips, because he's a father and has to make that joke.

Louis rolls his eyes good-naturedly before continuing. "It's actually about Lucy."

Now concerned, Harry stops and looks at him. Despite the age gap between them, Louis and Lucy are nearly as close as Lucy is to her sister. Harry thinks they somehow bonded over their similar names.

"It's just…" Louis bites his lip and glances around them. "I'm worried about her. The other day I saw her with a girl."

"Ah." Understanding now, Harry nods. Lucy hasn't announced her bisexuality yet. "Yes, she's waiting until after the wedding to tell everyone."

Louis gapes at him. "You knew?"

"I know everything, Lou," Harry says smugly. "Like how you're dating that Prewett girl."

Louis blushes bright red, showing that he does have the Weasley genes even if his hair is blond. "You can't tell Dad! We're only third cousins, and that means that less than one percent of our genes are similar, and the laws say we can marry even if Dad hates the idea of incest."

Harry raises one eyebrow. One of the bills pushed through recently said that no couple could have less than seven degrees of relation between them. Some of the purebloods protested, but Harry thinks it's a good idea. The wizarding world is too insular. Besides, there are so many more children in this generation that they should have an easier time finding someone to whom they're not closely related.

"My lips are sealed," Harry promises.

Louis lets out a sigh of relief. "Thanks, Uncle Harry."

"But you'll have to tell your parents at some point," Harry adds. "Especially if you think this will be serious."

"Oh, it is," Louis says, grinning. "Even more serious than James."

Harry groans. "You just had to do that, didn't you?"

"I'm a Ravenclaw. Puns and innuendo are my main weapon of choice," Louis answers airily.


AN: If anyone gets the pun in the last line, you get a gold star and a pat on the back. (Hint: think about Ravenclaw's element.)

AN2: Most people don't even know their third cousins, and marriage between them is allowed. It's atypical, I know, and still gives the sense of 'ew,' but I can see it being common in the wizarding world.