I don't own A:TLA but I do wish I did. It would be nice. I do own this plot though and any random characters I add in.
Aang watched as Katara walked down the aisle, her white dress flowing out behind her and the white lilies in her hands bobbing slightly with her every step. Gone from her hair were the normal loopies, replaced by an intricate bun with a single crimson ribbon. As he watched, Hakoda took her arm and walked the last length of floor with her, his face glowing with pride. Katara's smile was impossible to miss as she smiled at her fiancée waiting at the end.
"She's so beautiful" he muttered under his breath to Sokka standing next to him. Sokka threw him a withering glance and he turned back to the radiant bride as she stood before the priest of the Southern Water Tribe.
"Do you, Katara daughter of Hakoda, take this man to be your lawfully wedded husband?" His voice rang through the small hut as the whole congregation waited for her reply.
"I do." Her voice was triumphant, exultant, with an undertone of passion and love. Aang smiled at her joyous face, trying to ignore anything except her happiness.
"Do you, Hakoda father of Katara, agree upon the offered dowry and give your daughter to this man?" The priest's voice caused silence to run through the hall and at Hakoda's affirmative answer, Katara breathed a sigh of relief. Finally the priest turned to the groom and asked him the appropriate question.
Aang took a deep breath and Sokka watched him warily. Firelord Zuko's voice rang through the hut in the words that would forever condemn Aang's love for Katara. "I do."
Don't kill me. I know it's a Kataang story. I'm not stupid. It will change and all shall be revealed. It just has to start tragically.