A/N: I'll make this quick, don't read the A/N at the bottom unless you've read Harry Potter and the Half-Blood Prince. Oh, yeah, and I don't own HP.

The Last Argument

The next day, Lily and James went over to his apartment to find all of their friends, except Alice and Frank who were on their honeymoon, and James' parents already celebrating their engagement. Lily had been surprised, but James wasn't.

"Did you tell everyone that you were going to propose?" asked Lily.

"Pretty much," said James, smiling.

"And I suppose that this" Lily waved to the party, "was your idea."

"No, this was actually Sirius' idea. He wasn't about to miss a chance to throw a party."

The party went on for a few hours before Lily insisted that she and James should go to her mother's house and tell her as well.

As soon as Lily told her mother, she pulled both Lily and James into death-grip hugs. The three of them sat in Mrs. Evans' living room while Lily and James recounted yesterday's events, but did not include that they had seen Petunia.

Lily and James were telling Mrs. Evans that they had talked about having a November wedding when the doorbell rang. Her mother had been gone for a few minutes when Lily stood up and was about to go see who it was when Mrs. Evans came back into the living room followed by none other than Petunia and Vernon. Lily and Petunia both looked shocked to see one another, but their surprised reactions quickly gave way to deathly glares. As soon as he had seen Petunia, James had stood up next to Lily, just incase she decided to hall off and punch her older sister.

No, no, no, Lily thought, this can't be happening!

It was a very awkward moment, the tension could have been sliced with a knife.

Finally, Mrs. Evans attempted to break the ice. "Well, Petunia, we've just had some rather exciting news." Lily would have given anything for her mother to just shut the hell up.

"Oh, and what might that be?" said Petunia, her voice full of disdain, as she finally stopped glaring at her only sibling and looked at her mother.

"Lily and James are engaged!" said Mrs. Evans, who couldn't help but beam at her youngest daughter.

"Is this true?" asked Petunia venomously as she rounded on Lily.

Lily laced her fingers though James', held up her left hand to show Petunia her rather large engagement ring, and said, "Yes, it is," as though she were daring her sister to contradict her.

Petunia turned to her mother again. "Mum, do you think I could speak with my sister alone for a moment?" she asked.

"Of course Petunia," said Mrs. Evans, sounding pleased just by the fact that her daughters were speaking to each other. James and Vernon, on the other hand, didn't look as though they thought it was safe to leave this particular pair of sisters alone.

Once the room was empty except for Lily, Petunia said, "So, how far along are you, then?"

"Excuse me?" said Lily, not understanding her sister's question.

"I should have made myself planner. How far along in your pregnancy are you?"

Lily's jaw nearly hit the floor from pure shock. "You think that I'm pregnant?" she somehow managed to say though her ever rising temper.

"Why else would you two rush into marriage?" asked Petunia, with a hint of victory in her voice.

"First of all," said Lily slowly, trying to control her volcano of a temper, "James and I are in love, which, I would like to remind you is why most people get married." She sounded, and felt, as though she were explaining that two plus two equals four to a child. "And secondly, I am not pregnant."

But when Petunia still looked skeptically, Lily nearly screamed, "I'm not pregnant!"

"But you have been sleeping with him, haven't you?"

"I really don't see how that is any of your business." said Lily coldly.

"I'll take that as a 'yes'," said Petunia, matching Lily's coldness.

"You know what, Petunia, James and I are sleeping together. As a matter of fact we've been sleeping together for quite a while now. And not only do we have sex, but we have amazing sex, which, I'm sure, is more than you can say." Lily said rather proudly.

"You have no idea–"

"Exactly! You have no idea what James and I have been through to get to where we are today! Why can't you just be happy for me for once in your life, you self-centered bitch!" Lily yelled.

"How dare you, of all people, call me self-centered!" Petunia yelled, easily matching Lily's volume. "You, who disappeared off to that – that – freak school for seven years and left your family behind! You, who, only last Christmas, after our own father died, brings home some boyfriend who is just as much of a freak as you are, you whore!"

By this time, James, Vernon, and Mrs. Evans had burst into the room, watching the screaming match. Neither Lily nor Petunia had noticed them enter.

Lily had begun to walk towards Petunia with every intention of beating the shit out of her: she had put up with Petunia's insults for seven years, but Lily was not going to let her insult James.

But as soon as James saw Lily make a move towards her sister, he knew it was time to intervene. He quickly crossed the room and grabbed Lily around the waist, dragging her away from Petunia.

"Let go, James! I've had enough! L'me at her!" Lily protested.

He turned her around so that they were face to face, his hands having a firm grasp on her shoulders.

"Lil, calm down," he said in a low, soothing voice.

She took a few deep breaths and some how, just by looking into his beautiful hazel eyes, felt much, much calmer. A single tear slid down her cheek.

James instantly wrapped his arms around her in a protective and comforting embrace, which she gratefully returned, closing her eyes against his shoulder.

Suddenly, Lily felt the familiar sensation of blackness pressing down on her from all directions. When she opened her eyes, she saw that she and James were standing in the middle of the living room in her apartment.

She looked up at James. "Side-Along-Apparition?"

He gave her a small smile. "Would you rather be with your sister?"

She shook her head, led James to the couch that was directly in front of her, and once again buried her head in his shoulder.

They sat in silence for how long they didn't know. James ran his fingers through her hair more silent tears streamed down her face.

"How much did you hear?" asked Lily, speaking barely above a whisper, wiping the tears off of her cheeks.

"We came in when Petunia called you a whore. Why did she call you a whore?"

Finally looking at James, Lily replied, "Probably because I told her that you and I have amazing sex and that she and Vernon don't."

After James gave her a an oh-my-God-are-you-crazy look, Lily explained that Petunia had accused Lily of being pregnant, and all of the insults that followed.

"Well, I can't say I blame you," said James. "That's only the second time I've met her and she's been a stuck up bitch both times."

Lily could help but laugh, until the phone rang. Oh, great, she thought, that's probably my mother calling to ask if James and I are really sleeping together and then yell at me for it.

But for some reason, she went into the kitchen and answered the phone anyway.

"Hello?"

"Lily? It's Mum." she sounded very serious.

"Oh, hi,"

"Listen, Lily, I know that you and your sister don't get along very well, but why don't you and James come back over here anyway?" Mrs. Evans almost sounded pleading.

"No, not as long as she's there."

"Lily, this whole thing is ridiculous–"

"Then why don't you tell my darling sister to get over this whole anti-magical thing that she has?"

"Do you think that has never occurred to me? I've been trying to for the past seven years but Petunia is so– so– "

"Stubborn? Look, I've been putting up with this crap for seven years and I've had it! Did you know that she accused me of being pregnant?"

"Yes, and she also told me about you and James as well," Lily knew that her mother was talking about the whole "amazing sex" thing she'd told Petunia.

"Mum, I'm not in the mood for a speech about my loss of innocence or whatever, but--" Lily went silent; a single scarlet feather and a note had just dropped on her counter. Lily knew exactly what the note said before she even read it; she knew it was a summons to an Order meeting.

"Mum, I've got to go."

"Lily--"

"No, Mum, I've really got to go. I'll talk to you later." James had just walked into the kitchen, carrying a similar note and letter.

"Alright, dear. I love you."

"I love you, too. Goodbye." Lily hung up the phone and turned towards James.

"Are you ready?" he asked.

"As I'll ever be," she replied sadly before they both disapparated.

A/N: From here on out, I will be using the information given about any of the characters in my story in Harry Potter and the Half-Blood Prince, mainly Snape cough that son of a bitch cough, cause he heard the prophecy cough that son of a bitch cough.

Anyway, hope you liked the chapter, and don't forget to review!