As soon as she opened the door, she knew.
Someone was in her house.
She took two stealthy steps into the living room and listened.
Someone was in her sister's room. And they weren't being quiet about it.
Thieves obviously. Or maybe even the Agni Kai looking for payback.
She slipped across the room and readied her best fighting stance. She'd get a medal, maybe even a statue. She'd try to look stern, but benevolent in it.
She stomped her foot and the door shot open: "Freeze, you lily-livers! You're under arrest!"
There was screaming and a frantic tussle.
"Suyin! What the flameo!"
So much for that statue.
It was only Lin-clutching a sheet to her chest and turning bright red.
"Ouch! Watch your knee!"
Su's eyes narrowed at her sister and the wiggling lump under the sheet that soon revealed itself to be Kya.
"Spirits," Kya laughed. "I thought she was Toph."
Su allowed herself a smug smile before a book came hurtling towards her head.
"Get out!"
"Why aren't you in school?!"
If she were completely honest, Su would admit she was just a little frightened at how mad her sister currently was.
But Lin's tunic was buttoned up wrong and her hair looked a lot like their mom's did when she woke up in the morning.
"Why aren't you?" she shot back.
"I'm taking you back." Lin grabbed her elbow. "Now."
"No." She dug her heels in and didn't budge. "Let go!"
Lin's fingers were pinching and her feet were starting to slide across the floor.
She only had one card left to play, though she didn't like it.
"I'll tell Toph," she said evenly.
"And you'll be in trouble too."
Lin had a point-not that she thought their mom would particularly care that she'd been skipping school. She was more likely to get in trouble for snitching on her sister.
But Lin hadn't just been ditching.
"Not as much as you." She arched an eyebrow and looked squarely up at her sister. "Because you were having sex."
"Like you even know what that is." It was the tone Lin used when she told her she wasn't old enough to do something. She heard it a lot-like every day. But this time Lin wasn't as confident as she sounded because she let go of her arm.
Feeling braver, she countered: "I do. I've seen it a bunch."
And she had. The erotic art of Tong Li had been on display at the Republic City Museum of Modern Art for two weeks. It had certainly been educational-and a bit confusing as to what went where and why.
"What?" Kya was standing in the hall now watching them and rubbing at a red spot on her jaw.
"A whole room of it."
Kya got that same look on her face that Aunt Katara did.
"The gallery," Lin explained, rolling her eyes.
"What will it take for you to keep quiet?" Lin asked.
Su crossed her arms over her chest. She'd be stern, but benevolent.
"I want hair loopies."
Her sister and Kya exchanged a look then nodded.
Finally. For some reason, her mom and Aunt Katara got all uncomfortable when she asked for them and changed the subject.
She considered the rest of her demands.
"And your pro-bending trading cards-all of them," she told Lin. "And I'm not going to school tomorrow either."
Su shuffled through the stack of brightly-drawn cards as she sat cross legged in front of Kya.
The waterbender fixed one last tie into her hair and said, "Now you look just like a girl from the Southern Water Tribe."
"Kya," Lin warned. She'd been sulking on the couch for the last half hour.
"Trading cards, Lin?"
"They're collectors' items."
Su smiled.
She could get used to Kya hanging around her house.
Prompt: Su catches Lin and Kya in the act.