A/N: This is a one-shot from the anon prompt 'Anniversary'. Future fic, AU, romance, fluff.
Kurt struck the long, wooden match against the side of the box and watched fire engulf the tip. He approached the first candle on the cake. He touched the fiery tip to the first candle and smiled.
"The first time I met you, I hated you."
Sebastian scowled.
"You didn't hate me," Sebastian grumbled. "I contend that you were undeniably attracted to me."
"I hated you," Kurt repeated in a monotone.
"Impossible," Sebastian countered. "You eye-fucked me for twenty minutes at least."
"You were trying to steal my boyfriend."
"Yeah, well, you can't steal something that wants to be taken…ouch!"
Kurt put out the dying match on the back of Sebastian's hand, smirking at his yelp of pain. He struck another long match and lit the next candle.
"The next time I met you, I still hated you."
Sebastian rolled his eyes and huffed.
"In fact, I think I may have hated you even more…"
Sebastian grabbed the match. He reached over the cake and lit twenty more candles.
"Let's just assume that the next two dozen times or so, you hated me."
"Or, there's no assumption," Kurt confirmed, taking the match back. "I did hate you."
"So, when did you start not hating him?"
Kurt and Sebastian both turned to the little boy with the striking green eyes and wavy, chestnut hair, sitting primly on his father's lap.
Sebastian looked back at Kurt with a knowing smirk, challenging Kurt to explain the complexities of their twisted relationship to their five-year-old grandson.
"Well," Kurt started carefully, concentrating on lighting the rest of the candles as he spoke, "a man grandpa loved very much broke his heart…"
Sebastian's smirk slipped at the heavy weight of regret in Kurt's voice. He reached out a hand and rested it gently on Kurt's shoulder.
"…and I was sad and alone for a long time. Then, one day, I was out with some friends when I ran into your Grandpa Sebastian…"
"If I remember correctly you were drunk as a skunk and singing half-naked on the stage at Callbacks…ouch!"
Sebastian reached down a hand to rub his shin where his son had just kicked him.
"Damnit! What's up with this family? That's your son, Kurt!"
Kurt snickered, lighting a new match since the second one had died out. The little boy raised a hand to his face to hide his own giggling. Kurt looked down at him with a smile.
"Where were we, Andrew?" Kurt asked as the boy recovered.
"You were a singing drunk," Andrew's father answered for him. Kurt frowned.
"No, you see, that's your son, Sebastian," Kurt said flatly. "Thank you, Seth."
The man winked at his father, and Kurt held his breath. The two of them, Seth and Andrew, looked so much like Sebastian, it was heartbreaking. But if anyone asked Sebastian, he would say they both looked like Kurt.
"So, grandpa took me home…"
"…and after lots of cursing and throwing up, we fell madly in love."
Sebastian wrapped his arms around Kurt's waist and held him tight, watching as Kurt lit the final candles.
"That's a bit of an oversimplification, don't you think?" Kurt whispered so only Sebastian could hear.
"Well, what did I leave out?" Sebastian smiled against Kurt's cheek.
"You left out all of the long talks…"
"All of your whining and moping…"
Kurt elbowed Sebastian, who finally managed to dodge a hit.
"All of the fighting…" Kurt reminded him.
"All of the makeup sex…" Sebastian purred into his ear. Kurt blushed, remembering their round of makeup sex from just that morning.
"Our first kiss…"
In Central Park…in the rain…after a particularly nasty fight. Kurt would never forget it. It was one of the happiest moments of his life.
"How about all of the kisses after it?"
"Of course," Kurt agreed, lighting the last candle and blowing out the match. "One beautiful son…"
"And one gorgeous grandson…" Sebastian turned and looked at the little boy, momentarily occupied by his Flash action figure, "who looks just like his grandpa."
Sebastian turned Kurt's head to look at him and kissed him softly on the lips. The moment Sebastian pressed his lips against Kurt's it was like the first time; the same electric spark, the same breathless excitement. It always amazed Kurt how much emotion could be expressed in a single kiss.
Kissing Sebastian always felt this way.
It didn't matter that Sebastian's hair had more grey strands every year that passed, or that they looked forward less to the new musicals Kurt would star in, or the new mergers Sebastian would make, and looked more towards retirement. Sebastian would always be that cocky, self-assured ass that Kurt fell in love with.
Kurt might feel older, but Sebastian would never age.
"So, thirty-eight years of marriage," Sebastian said, unwilling to pull away from his husband's lips. "If you had it to do all over again, what would you change?"
The question startled Kurt. Sebastian had never asked him that before.
For a split second, Kurt gave it some thought.
"I don't like you."
"Fun. I don't like you either."
"I don't like the way you talk to my boyfriend. I don't like your smirky little meerkat face. I don't like your obnoxious CW hair."
"So, your boyfriend cheats on you, you get drunk, and you have to rely on me to get you home? Man, your life really sucks right now."
"Why are you defending him? He's such an ass!"
"I'm not defending him…I'm just…I'm so lonely without him…"
"I hate you!"
"Maybe, but you can't tell me you don't want me…"
"So, if you're going to fuck me, Smythe, then fuck me before I change my mind."
"No, Kurt. I want to make love to you, so if you're going to be a bitch about it, I'm willing to wait."
"So, what? You're leaving now? You got what you wanted, and now you're going to go? Fuck you, Sebastian!"
"No…because I'm not leaving without you. I'm not going anywhere. I want to marry you, asshole!"
Kurt smiled.
"I wouldn't change a thing," Kurt admitted.
Sebastian raised his eyebrows.
"Really?" he said with a tone of disbelief.
Kurt kissed him again, slowly, savoring the sparks, enjoying the breathlessness. He smiled wider against Sebastian's lips when he felt his husband gasp.
"Not a thing."