Disclaimer: See "Stories of the Hogwarts Sisterhood"

Disclaimer 2: Some of the scenes and lines come from "The Prime of Miss Jean Brodie" and I certainly do not own them

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Note: This is a sequel to "Stories of the Hogwarts Sisterhood"; taken place several months later during Easter holidays, so read that first.

Thank you for the reviews!

Rated PG-13 for content

Chapter 11: Back to the future

A week later, the last day of school and also the 7th years' graduation ceremony arrived and it was held in the Great Hall. At the morning, Achilles was showing off his graduation robes to Athena in the 7th year boys dormitory, which was black, trimmed at the edges with thick golden threads and had the Hogwarts crest on the chest. His pointed hat was black as well. Athena just adored it and hoped that she could do well enough to wear that when she was back in 2004.

At dinner time, Dumbledore announced the winner of the House Cup, Gryffindor didn't win, of course, Ravenclaw won and Athena saw Achilles giving Philip a thumbs-up.

The graduation ceremony was held at the night and to Athena's surprise, not all the 7th years' graduation robes were the same. Although Achilles's robes were trimmed with gold threads, she saw the Ravenclaw boy, whom Achilles called Philip, had robes trimmed with bronze coloured threads. The 7th year Slytherins had robes trimmed with sliver threads and the Hufflepuffs had pure black robes.

The Great Hall had rows of seats instead of the usual House tables and had the Hogwarts Banner hang behind the High Table. At the sides of the Hall were the usual Houses Banners.

Minerva gathered all the graduating students (Athena went to sit with the 6th years, who were also attending the ceremony, at the back of the Great Hall) and let Dumbledore to say the farewell speech to them.

"Now I won't say much, since all of you are eager to get your certificate and be graduated," started Dumbledore. "Your last day of school is finally here. After today, you can leave Hogwarts and do whatever you want, whether to be an Auror (Athena saw Achilles giving Philip a grin), a curse-breaker at Gringotts, a personal at the Ministry of Magic or even a teacher back here at Hogwarts. Although I don't think anyone will want to do that, since graduation is the best way to get rid of us."

Some of the students laughed. Achilles and Athena didn't say anything, since they had the Transfiguration instructor and the Headmaster as their parents.

"All of you are the best students in Hogwarts and we are honour to have you. I just wish all the best for you in the future, thank you."

The students and teachers clapped. Minerva and Mandy left the Great Hall and came back with a big box of certificates and put it down beside Dumbledore.

Minerva took out a scroll from her robes and said, "Now when I called your name, please come forward to get your certificate."

She called out the first name and when a Slytherin student came, a certificate with sliver ribbon flew out of the box and landed on Dumbledore's hands. He gave it to the student, and the student bow to the audience.

As the ceremony went on, Athena noticed that the certificate were the same as the robes. Certificates with sliver ribbons were for the Slytherins, golden ribbons were for the Gryffindors, bronze coloured ribbons were for the Ravenclaws and the black ribbons were for the Hufflepuffs.

When she arrived at "M" for Achilles, Athena clapped loudly as she watched her brother marched smartly to his father, smiled at him and received his certificate. She saw that Minerva was wiping her tears with a handkerchief while Mandy, Poppy, Georgia and Dumbledore were smiling.

"Aw, look, Professor McGonagall is crying." said Charles Wood, who was sitting beside Athena.

"Of course she will, Achilles McGonagall is her son. Seeing your son graduating is a very happy thing." said Lockhart from behind.

"Finally, Lockhart is talking sense." thought Athena.

"Hey, wait a minute, I thought you are in the 7th year with your brother." said Charles.

"Yeah?"

"Then why are you sitting here?"

"Err, I........can't." said Athena slowly.

"Why?" asked Lockhart.

"Oh, I know, you are new here! So you have to repeat a year to catch up!" said Charles.

"Um, yeah." lied Athena. "I am starting to lie like Mom." She thought.

***

When the ceremony was finally over, the 7th years cheered and threw their hats in the air. Athena rushed through the crowd and hugged her brother as tightly as she could.

"Oh I am so happy for you!!" She cried.

"Thanks........" started Achilles when Mandy came to them.

"Hey there, how about a party for my Godson in my office?" She asked. "Your mother, the Hogwarts Sisters and your father will be there, of course."

"All right! Is there any Butterbeer?" asked Achilles.

"You bet!"

"Yeah! Come on, Sis, let's party!"

***

Achilles opened his certificate at Mandy's office and found that instead of the name "Achilles McGonagall" on the certificate, "Achilles Dumbledore" was on it.

"My rightful name!" said Achilles happily.

"Cast a special spell on it so that it would fly out when I said McGonagall." said Minerva and hugged her son. "I am so proud of you."

Athena looked at her brother and mother, wondering how a stupid argument could tear them apart.

"Athena, Athena? Hey, Earth to Athena!" yelled Minerva, waving her hand in front of Athena's face.

"Huh, what?" asked Athena.

"What's wrong with you, huh?"

"Nothing." said Athena immediately. "Can I have a Chocolate Frog?"

***

The party went on until 11 am. Achilles and Athena went back to the Gryffindor Common Room and saw that the Gryffindors' graduation party was still going on.

"Hey, Achilles! Come and have a drink of Butterbeer with us!" yelled a 7th year.

"But........." started Achilles.

"No buts!" The 7th year interrupted and grabbed Achilles's hand. He shoved a bottle of Butterbeer into Achilles's hands.

"Well, okay.........." said Achilles.

"I will see you tomorrow morning. Goodnight." said Athena and gave her brother a sisterly kiss on his cheek.

Achilles blushed furiously while his classmates teased.

Athena was on the staircase when he said, "Come on, she is just my sister!!"

Athena went to her bed at the 7th year girls' dormitory, climbed in and lay awake, listening to the party below. She kept on listening until she finally drifted off to sleep.

***

"Athena, Athena, wake up." called a female voice.

Then the sound of curtain being drawn was heard.

"Athena, it is already 10am! Wake up!" said the woman sternly.

"Come on, the train won't be leaving until 12 pm!" said Athena tiredly, without opening her eyes.

"What are you talking about?" said the woman.

Athena's eyes snapped open and she saw her mother standing beside her bed, with her hands on her hips.

"M-Mom?!" She exclaimed, sitting up on her bed. She looked around the room and saw her usual things that she had in her bedroom in 2004. She looked down and saw that she was clutching her wand and the picture of Achilles. The horrible truth sank in immediately. She was back to her present time.

"Oh no." groaned Athena.

"What?" asked Minerva, and then she caught sight of Achilles's photo. Her face darkened and she held out her hand. "Give me that, Athena."

Athena shook her head slowly.

"He is not worthy for you to acknowledge!" snapped Minerva. "Now give me that!"

Athena shook her head harder.

Minerva swallowed and closed her eyes. When she opened her eyes, she looked calmer. "All right, fine. Tell me the truth, Athena. Did you go back to the past last night?"

Athena nodded slowly. "But I still don't know why you are so against the idea of Achilles being an Auror."

"You will never understand." said Minerva quietly.

"Of course I won't, if you don't tell me why."

"I can't." said Minerva with her voice shook. "The Hogwarts Sisters and I had made a solemn oath not to talk about it."

"Is it about 1953? What happened during that year?" pressed Athena.

"Look, Athena, I will not talk about it!" said Minerva loudly and left the room.

"That is probably the reason why Achilles left!" shouted Athena behind her mother.

Minerva didn't look back.

Athena lay back onto her bed and sobbed. "Damn this stupid time-travel, damn this oath, damn 1953! Now I will never see Achilles again!"