This is an AU.
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"Katara!" Sokka yelled to his sister, who was comfortably sitting on her lawn chair, drinking lemonade through a pink, neon straw.
"Hm?" she replied, her mouth still clamped down on the straw.
"Don't 'hm' me! Help!" he yelled back, walking up to her while carrying two heavy, big, boxes, staked on top of each other. Katara glanced at him and gave into his nagging, took a box from the stack, and placed it on one of the white tables.
"This yard sale was a stupid idea," Katara said and sat back down on the old lawn chair.
"God, Katara, why do you have to be so negative? You PMS-ing?" Sokka asked her, a little playfully. Katara shot him a glare, and looked over at the opposite side of the road, and when she wasn't looking, Sokka stuck out his tongue.
It was a hot day outside, the sun shinned down on the siblings, making them sweat, they weren't accustomed to it, nor did they like this type of weather. Katara hated the weather even more than her brother. She couldn't take her shirt off like her brother when it was over ninety degrees outside. Katara sighed and wiped the sweat off her forehead. Then, she grabbed the glass of cold lemonade, that seemed to be perspiring itself, and gulped the last of it down.
"Toph!" Sokka called in the direction of the messy garage. A girl emerged from it carrying a brown box that was almost half her size. However, she continued to carry it with ease despite its weight and her blindness.
"What?" she snapped at Sokka, letting the box go on the table, resulting in a loud thud.
"We got to pass out the flyers or no one will come," Sokka told her, holding up at least forty papers, all kept together by a single rubber band.
"That's what I said before," Katara mumbled. Toph and Sokka began to walk towards the street.
"Katara, make sure to unpack the stuff!" Sokka yelled to his sister as they ran off. Katara just stayed silent and got up to unpack. She was glad she got some privacy for once, she loved her brother but. . . you get the picture. She picked through the contents of te box.
Let's see. . . a frying pan, a black sweater, two tank tops, a white top, a velvet belt, and one pair of jeans.
She began to search through the pants, in case it had some forgotten money in it. Once she left her mother's necklace in the back pocket of her jeans, during the last time they had a yard sale. She sold them and only realized the fact later, a good hour later. The next day the son of the person who bought the pants, returned the necklace. The boy's name was Zuko, and he later became her boyfriend.
It's been a year since you died, Zuko, she thought.
She checked in the left back pocket, nothing, just a little lint. She checked the left, nothing in there. . . no, wait. She pulled out a piece of paper that was folded. She fingered the paper, turning it over and examining it. She then unfolded it. Her eyes widened.
It read:
Katara, will you marry me?
Love,
Zuko