Title: Petunia's Third Year

Rating: K

Summary: Petunia Evans returns for her third year. Lucius is gone and Narcissa is in her last year. Rumors abound Slytherin House and James and his friends are bound to make Severus, Remus, Lily and her year hell. Sequel to Petunia's Second Year! A crossover of Harry Potter and Percy Jackson!

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

Chapter 1: Monster Through the Window

"Look at the amount of homework that we have," Lily moaned.

It had been three days since they had come back and Petunia had already finished her Potions work. She was now on her Herbology.

"Don't worry about it," Petunia said, "We have all summer to get it done."

"I bet Sev has his done," Lily muttered.

"I'm sure he does," Petunia said.

"Is everything alright?" Petunia's stepmother asked.

"Yes, mum," they said at the same time.

When Petunia was done with her Herbology work she left Lily alone to finish her Defense Against the Dark Arts work. She had all summer to finish it and she would be half-way done by the end of the week. She had to focus on her next Horcrux as that was the most pressing matter.

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"Do you think that Tom has been defeated?" Minerva asked Albus.

"He's not been defeated, just weakened," Albus said, "And with each Horcrux that is destroyed he gets closer to the end. I don't have any doubts that someone is going to try and aid his return."

Minerva shuttered.

"That's why we have to be on our guard," he went on. "I don't know how many are left but when he's gone, then we'll know that he's been fully defeated."

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"I'm going to visit Sev tomorrow," Lily told Petunia as they headed to bed.

"If his father gives you any problems I'll be at your side at once," Petunia told her.

"Thanks," she said and she headed for her room.

Of course Lily was most likely not the only one that was worried about Severus. She had fought against his father and knew that the man was beyond nasty. He was downright evil and his wife was nuts staying with him. Of course she vowed that if Lily was in any danger she would make that man pay and pay big. She changed for bed and had just lain down when something crashed through her window.

At once she grabbed her pen, changing it into a sword. The thing, whatever it was, looked at her. It growled at her and then came at her. Petunia stopped time and then cut it in half. When she returned time back to normal the thing headed back to the Underworld. The door suddenly burst open and in ran her father and stepmother.

"What happened?"

"Monster," Petunia answered and she went to sleep.

"What happened?" Lily asked the next morning as someone measured for a new window.

"A monster," Petunia answered.

"Not again," she moaned.

"Sis, this is what my life is like," Petunia told her. "This is something that I do."

"I don't like it," she said.

"I know," Petunia said, sadden that her sister was being dragged into this again.

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"I'm just worried about Tuney," Lily told Severus. "I mean, a monster attacked during the night."

"Is she alright?"

"Yeah," Lily answered. "She acts as though this isn't a big thing. Well it's a big thing to me."

"Want me to have a word with her?"

"I doubt that it will work," Lily said, "But you can try."

"That's all I ask," Severus told her.