Albus looked how Lily went away.
"What do you want to tell me?"
He didn't trust it. I'm feeling responsible, that meant it was something really dangerous or illegal, otherwise Rose would have trust her with it.
"I'm going to the celebrations in Hogsmeade next week."
"Celebrations?"
"Next week on Saturday and Sunday there is a street festival in Hogsmeade because the war has ended twenty years ago. Especially Saturday night must be awesome. I don't want to miss it!"
"You want to leave the school in the middle of the night?" He must have understood Rose wrongly. She couldn't do something like that.
"Yes, are you coming with me? This is going to be awesome!"
"This is crazy! If you are really planning to do so, you are mad!"
"Says the boy who almost killed himself last month in a stupid Quidditch match..."
He didn't like the bored tune she used in her last sentence. It meant that probably she wouldn't change her mind.
"You will be expelled if they catch you!"
"I won't be caught."
"How do you know that?"
"I've got this."
Albus didn't believe his eyes.
"The Marauder's Map! How did you get it? It's James'."
"It's a copy. I have borrowed the map during the Christmas Holidays and made this."
"Does it work? Uncle George said that he and uncle Fred had tried to copy it a few times, but never succeeded to do so."
"I needed to combine different spells, probably they just used a copy spell."
"Okay, probably they won't catch you when you're still at Hogwarts, but what if there is a teacher in Hogsmeade that evening? Or if someone recognizes you and tell it to a teacher? And even if no one knows you, you will attract attention. Everyone will see you should be on Hogwarts."
"That's why I've got this."
Albus looked at the flacon in Rose's hand. He could guess what was in there.
"An aging potion?"
"Indeed, I will look 21 years old for five hours. I've tested it yesterday night. And thanks to some changes, I don't only look 21 years old, but also my outfit change into something more suitable for someone of that age."
He couldn't believe what he had heard. This was too crazy.
"What?! Some changes? Are you serious? It isn't safe to experiment with potions. Especially not when you drink of it."
Rose shrugged.
"Are you sure it is safe?"
"I'm still here and nothing is wrong with me."
He sighed. "I guess so... But there are still some other things. What if they notice that you aren't in your bed?"
"They won't, because a copy of me will."
"A copy of you?"
Rose took her wand and a pot with a spider in. She waved with her wand and suddenly there were two spiders.
"I've already tested it on myself and it works as good. The copy can't move out of himself, but that is only better."
"Why do you always think of everything?"
Rose laughed. "That's probably why I'm a Ravenclaw."
"I don't think so, it means that you're sly. Maybe you should have been a Slytherin."
"The sorting hat was thinking about that. He was also thinking about putting me into Gryffindor and Hufflepuff. But then he said that I'll see things others don't. That my wisdom can change things. That's why he has chosen Ravenclaw. However, he said that I could be in every house, there were plenty of reasons to put me into another one."
Albus had always known that Rose wasn't a normal Ravenclaw. She was too reckless and didn't learn as much as the others did. He had always wondered why she wasn't a Gryffindor. Most reckless people were Gryffindors. And she was brave and she wanted to prove herself.
"And maybe you should prove the hat was right when he put you into Ravenclaw and don't go."
"Al, there is nothing that can go wrong. I really want to go."
"I'm not coming."
"Okay, it's your choice."
"So, you are going alone?"
"No, Alice wants to come with me and so do Michael and Rex."
He couldn't believe that Alice, Michael and Rex who normally did nothing that was forbidden also would go to Hogsmeade.
"You are all crazy."
Rose shrugged. "So are you. Risking your life..."
"Yeah, I know," he interrupted her. "You know, of course I don't want anything happens to my little sister, but maybe it'll be better if you tell Lily about your plan. You are very good friends and I think she will stay angry for the rest of her life, if you don't trust her."
"But..."
"Rose, you are prepared very well, I think we can better take the small risk that anything happens, than the risk that she won't be friends with you again. And if she wants to come with you, I'll try to persuade her not to go."
"Okay, I'll tell it to her."