Disclaimer: I own nothing. All J.K. Rowling's characters.

Lily Luna Potter stomped up the stairs, her red hair swinging behind her. She slammed the door of her room closed, before sighing and closing her eyes. Today had been a mistake.

Introducing her cousin to her boyfriend had been unfriendly, in the least. What she didn't expect was that her cousin seemed personally offended by her choice of boyfriend material.

There'd be hell to pay for tonight.

Right on cue, the speakers downstairs began playing so loud she could feel her room vibrating.

A boy like that who'd kill your brother

Forget that boy, and find another

One of your own kind, stick to your own kind

She grabbed a pillow and stuffed it over her face, but the feathers were nothing against the deafening song shaking the house.

A boy like that will give you sorrow

You'll meet another boy tomorrow

One of your own kind, stick to your own kind

Lily screamed in frustration. But again, the words entered her ears and wiggled into her brain.

A boy who kills cannot love

A boy who kills has no heart

And he's the boy who gets your love

And gets your heart

Very smart, Maria, very smart

Deciding she'd had enough, the irate redhead threw open her door, and her heavy footsteps on the stairs added to the rhythm of the song.

A boy like that wants one thing only

And when he's done, he'll leave you lonely

He'll murder your love, he murdered—

"For goodness' sake!" Lily exploded, reaching the lounge.

The brunette who was staring fixedly at her raised an eyebrow. "Oh, I'm sorry, I forgot that not everyone listens to musicals. Maybe this is more to your taste."

The voice singing almost an opera was replaced by a slower, more modern tune. Lily groaned, but the brunette ignored it, still glaring.

Knew the signs, wasn't right

I was stupid for a while

Swept away, by you

And now I feel, like a fool

Lily stepped forwards to press Stop, but the brunette blocked her path, eyes blazing.

"You're going to listen to this song, Lily," she said in a hard voice.

So confused, my heart's bruised

Was I ever loved by you?

"I've already heard it," Lily hissed. Without another word, she moved the brunette aside and clicked the mouse.

The stare-down between cousins began.

"He's not good for you," Rose Weasley said, looking like her formidable mother. "Of all people, Lily. You're a popular girl, find someone who's worth you. Someone your father won't kill, at least."

Lily fired up. She and Rose usually got on, but their stubbornness made for massive arguments. "I get to choose who's good for me," she argued. "And all those other guys are just players—"

"No!" Rose yelled. "You're so bloody blind, Lily! He's the player, and he's just messing with your head!"

Lily seethed. "You know nothing."

"I'm so sick of you not being able to see it," Rose screamed. "He's a player, his father was a player before him—"

"See, that's where you're wrong," Lily shouted back. "You're confusing him with his father! You don't know him!"

Rose flicked a brown curl over her shoulder. "I hear enough, thank you," she said coolly. "His reputation speaks for him."

"You're not my mother," Lily retorted.

"No, but she'd be pissed as hell if she found out."

Lily had had enough. "You're just jealous that you won't ever get your crush to like you!" she shrieked. "Always have your nose stuck in a book. It's no wonder Orion McLaggen doesn't notice you!"

The furious redhead stomped out of the lounge.

Her parting remark hit Rose hard. Rose knew she was taking after her mother in the social department, but Lily's barb mentioning Quidditch Captain Orion McLaggen was just too much. How did Lily even know she liked Orion?

One minute later, Lily was back downstairs.

"I'm so sorry," she said, embracing her cousin. "I didn't mean to be such a bitch."

Rose sniffled a little. Lily always apologised eloquently. "I'm sorry, too," the brunette replied. "I forget that you're not much of a younger cousin now, and that you can make your own decisions."

They were quiet for a moment, Lily taking on the role of older sister as she gently rocked Rose. Then, she began singing.

When love comes so strong

Rose smiled shyly, and joined in.

There is no right or wrong

Your love is your life

"What?" Lily asked, seeing Rose's surprised face. "Didn't you know Dad made me watch West Side Story?"

.

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AN:

Written for MysteriousFlower's A Very Musical Challenge.

This story was supposed to show the bond between sisters (technically, cousins).

A Boy Like That / I Have A Love by West Side Story

Out Of Reach by Gabrielle

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