The dining room was quiet, too quiet to be a good thing. Of course it was just the calm before the storm. As Harry and Cassidy stared at each other, the room became both fire hot and icy cold, though no one knew why. Well, actually, only two people knew why.

Snape and Dumbledore both knew that the reason for the constant temperature change was due to mixed feelings about the 'Harry and Cassidy are twins' thing. The two teens in question couldn't decide if they liked the idea of having such a closely related family member.

Finally, when Snape cleared his throat, Harry broke eye contact with his twin sister and became a nasty shade of magenta, which was the sign that showed he wasn't happy about something.

Harry glared at Snape before he let his anger get the better of him, and then began shouting at the Potions Master.

"If she's my twin sister, than why is she hanging off of you!?!?! Clearly, we're not twins, since she seems attached to you!!"

Cassidy looked at Harry before turning to hide behind Snape again. Remus and Sirius both had to physically drag Harry out of the dining room, and into the study, where they explained the whole thing to him. By the end of the explanation, Harry was still fuming, but no longer that violent shade of red. When the three of them returned to the dining room, they were surprised to see that Snape was allowing Cassidy to cuddle into his side, even though he looked very uncomfortable.

At the moment, Tonks was showing her abilities to Cassidy, who found it only slightly interesting before she said that she had more interest in Potion-making than she did in changing her body's physical appearance.

When Cassidy said that, everyone in the room noticed how proud Snape looked. He had finally found a Potter that was exceptionally gifted when it came to Potions, unlike her brother or father, both of whom had only received 'Exceeds Expectations' on their O.W.L. in Potions.

Since it was almost time for supper, Cassidy nearly begged Snape to stay with them, since she didn't want to be left alone with people she didn't really trust at the moment.

Dinner went by as usual. The Weasley children, along with Harry and Hermione, were laughing at some stupid joke or story, while most of the adults talked about one thing or another. Snape was actually having a conversation with Cassidy, which was surprising, since he usually remained silent during meals. It was really starting to get on Harry's nerves. He wanted to get to know his sister, but she was paying attention to Snape, almost as if he was the only person in the world to talk to.

- - - - -

The library was rather boring in Cassidy's opinion. The adults had sent the students into the library, until the Order meeting was over. Sure, there were plenty of books to read, but none of them were on Potions, which really pissed her off. Hermione was working on her summer homework, while Ginny watched Harry and Ron play Wizard's Chess. The looks that Ginny kept sending Harry's way were beginning to get on Cassidy's nerves. Finally, when Ginny gave up on trying to get Harry's attention, Cassidy noticed that her twin brother was getting his ass kicked, big time, by Ron for the third game in a row.

Sighing, Cassidy walked over and sat down next to her twin.

"I play winner."

That caused the other four in the room to look at her in a funny way, though none of them said anything. As Ron and Harry continued their game for another five minutes, Cassidy observed her brother's methods, and mentally laughed at him. The game finally ended with a brutal defeat on Harry's part, and Cassidy took his place at the table, and as the game began, Harry, Ginny, and Hermione stood next to the table to watch the two teens go head-to-head with determined looks on their faces.

Two minutes into the game, Cassidy looked over at Ron, and noticed that he was smirking at her, clearly thinking that he was going to beat her. Cassidy smirked back, and the game became almost brutal, until finally, after five minutes, Cassidy beat Ron with only two of her guys missing.

The whole room fell silent, as Ron gaped at the board, hardly daring to believe that he had lost, and to a girl!!

The door to the library opened and the adults came in, showing that the meeting was over, but as they approached the table, they froze. The defeated look on Ron's face, coupled with the smug look on Cassidy's, suggested that they had missed a great game of Wizard's Chess.

Harry looked at Cassidy and asked her one question: "How are you so good at that when I'm so terrible?"

Cassidy shrugged before answering.

"I'm president of the Wizard's Chess Club at Salem Academy of Magic in America. Over there, I'm undefeated."

Silence filled the room as Cassidy stood up and stretched. As she looked around the room, she noticed that one person was missing from the group.

"Where's Severus?"

Remus sighed, looking at the floor, knowing that Cassidy would not be happy with the answer.

"He left right after the meeting, saying that he had a lot of stuff to work on at his place."

"He- he left? Without saying good-bye? That's bad manners. Get him back here."

The last sentence was more of an order than a request, and Remus hopped right to it, not wanting his Goddaughter to be any more upset. Using the Floo Network, he fire-called over to Snape's house.

"Severus, are you there?"

A grumble was heard at the other end of the connection before Snape's sour-looking face appeared in front of Remus.

"What is it you want, Lupin? I'm rather busy."

"It's Cassidy. She's a little upset that you left without saying good-bye to her. Actually, 'little' is an understatement. She ordered me to get you back over here."

"And why would I go back tonight?"

"Because you displayed bad manners, in her opinion, and for her, that's unacceptable. By the way, you missed it. In fact, all of the adults missed it, but Ron finally lost a Wizard's Chess game, and it was to Cassidy. Turns out that at her old school, she was president of the Wizard's Chess Club, and undefeated. She's rather upset that you weren't there to looked at her proudly. She seems awfully anxious to make you happy and proud of her."

Snape sighed and reached up to rub the back of his neck with one of his hands.

"Perhaps I was a bit hasty in getting out of there. Move over, I'm coming through."

As soon as Snape was back in Grimmauld Place, he found his arms full of an anxious and upset Cassidy Potter. It startled him that he had been missed so much in only ten minutes.

"Severus, I don't want to stay here. I want to stay with you. Please?"

Silence filled the dark home, far more than it had in the past.

Snape sighed, before he nodded.

"Fine. Get your things."