Title: The Event that Changed Everything

Rating: T

Summary: One tiny event changes everything for Petunia Dursley. She gets invited to attend Hogwarts during Harry's fourth year. Based on the Magical Petunia challenge on Potions and Snitches.

Disclaimer: I don't own any of Rowling's characters and I'm making nothing from this.

Chapter 4: Plans, Flying Lessons, and Visions

The strange thing happened during the first week that Petunia was at Hogwarts. Harry never once mentioned what she had once called witches and wizards. Petunia didn't dare ask Harry why he wasn't taking advantage of the fact that he could now make her life as much of a nightmare as she had done his. She was still upset with Dumbledore, trying to tell her what she could, or couldn't do. On Saturday she went to see Professor McGonagall.

"I wanted to visit my husband and son's graves," she told her. "Since I don't have any classes until Monday."

"I think it can be arranged," she told Petunia and Petunia thanked her and left.

The next day Petunia found out that she was going with Professor McGonagall around eleven to visit her love ones graves. She put on muggle clothes and McGonagall showed her the Knight Bus, which should be declared a hazard.

"You shocked everyone with how you reacted to Professor Snape."

"He was nasty to me as a child and I've heard that he's nasty to Harry."

"You didn't treat him any better."

Petunia sighed and said, "I'm not proud of myself. Losing my husband and son opened my eyes to things that I shouldn't have let happen. I lost my sister and losing my husband and son hurt almost as bad as losing Lily."

"It doesn't excuse things."

"I know it doesn't."

When they arrived McGonagall left her alone to be with those that she cared about.

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"So Lily Potter's sister has magic," Voldemort said, "Well that will change things."

"What about the plan?"

"I have someone else that will help me," he said. "Did you think that Barty Crouch was the only plan that I had?"

Peter said nothing, which Voldemort liked him doing. It gave him time to think.

"Summon Aset Bloodbane," Voldemort ordered. "She owes me a favor."

Peter went white, but he did as he was told.

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McGonagall watched Petunia standing at the graves and wondered what she was talking about. She could have used a charm, but decided against it. She might want to know, but she dared not to do anything. When Petunia came back, she had tears going down her face.

"I'm ready to go," she said.

McGonagall nodded and they left the graveyard.

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When Petunia got back to the school she managed to look as though she hadn't been crying. She entered the Gryffindor common room and at once was cornered by one of the Gryffindor Prefects

"Why aren't you in your robes?"

"I don't have time for this," Petunia said.

"Mrs.-."

Petunia turned on him and said, her face screwed up in anger, "I WAS VISITING THE GRAVE OF MY HUSBAND AND SON, YOU OVERPOMPUS JERK. HAVE SOME DAMN RESPECT FOR THOSE THAT ARE MOURNING."

And she stormed away.

"Mrs. Dursley," she heard a girl call out but Petunia ignored her. "I'm Hermione Granger. Look, don't listen to him. He's just like Percy Weasley."

Petunia had no idea who Percy Weasley was, but she felt that he might be related to the Weasley family.

"Just leave me alone," Petunia begged.

"Alright," Hermione said and she left.

The next day there was a notice on the board. Flying lessons would start on Thursday and Gryffindor and Slytherin would be learning together. Where was the idiot that thought this was a good idea? Petunia had a bad night, nightmares of her husband and son burning up. And then she had another nightmare, something so terrifying that it had taken her hours to get back to sleep. She was in a room and she saw a large snake, which almost made her scream.

Thankfully it wasn't doing anything. She saw a chair and a man that looked a bit like a rat. And then a woman walked in and bowed.

"Aset Bloodbane," it hissed, "Most glad that you could make it."

"What do you need?" she asked.

"You know the Triwizard Tournament is coming," it said.

"Of course."

"I want to make sure that Potter is in the Tournament," it said, "And I want to rid the last of the Evan family. I know that you heard that Lily Potter, that filthy Mudblood's, sister showed magic and is at school."

"Don't remind me," Aset hissed, "More damn mudblood's walking around."

"Make sure that both are within my grasp to destroy."

"As you wish, Master."

And then the nightmare ended.

Petunia didn't know what to do. Should she go to someone, anyone, about this? Maybe she was going nutters like she thought her son might do. She didn't know who to trust and who not to trust and that scared her. On Thursday she joined the other students down on the grounds for their first flying lesson.

When she saw the brooms any worries that she had flew out the window. She was going to fly on a broom like she had always wanted to the moment she found out about Hogwarts and the magical world. Madam Hooch taught this class and she had them get into lines.

"Alright, put your right hand over your broom and say up."

"UP!" Petunia, and the others, yelled and the broom jumped right into her hand.

The others didn't have as much luck, but finally everyone had their broom in their hands. She taught them how to hover, go forward, and they did a couple of laps around the field. When it was over Petunia felt that flying had been the best of the week. The next morning wasn't so nice. She had another lesson in Potions and she knew that Snape hated her as much as he hated Harry.

Petunia discovered very quickly that she understood what was in front of her. That didn't mean that Snape liked having a gifted non-Slytherin in his class. Snape gave her a look of loathing and she gave him narrow eyes. They both hated each other and Petunia made sure that the Gryffindor's knew how much the hate went. Today they were working on the Dog breath Potion. Petunia lined up the ingredients and got to work.

As they all worked Petunia noticed Snape walking around, but not coming near her. She didn't want, or need, him breathing down her neck while she tried to work. The potion was supposed to be purple hue and a nice purple hue is what she got coming from her cauldron. She put a sample in, put her name on it, and went to turn it in. When he wasn't looking she took another sample and put it into her robes. Snape came around to vanish their cauldrons and then the bell rang.

She took longer to pack things away and that's when she noticed that his office door was open and a pot of coffee was on his desk. Snape left her alone, most likely to do something else, and so she snuck in and poured some into his coffee. She was going to have a bit of fun with this magic stuff. She left, with her things, a grin on her face.

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"Severus Tobias Snape, did you eat some of Dumbledore's experimental candies?"

"What are you-?"

He touched his throat and let out a small amount of flames. With those flames his temper rose. He had been pranked with Dogs breath potion.

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A/N: I'm currently working on the next chapter of Headmaster Snape and the Percy Jackson books. It's been really slow due to being totally exhausted from working. It should be up soon.