Author's Note: A Christmas present to the lovely Tsubaki! As always I wish you a Merry Christmas and a Happy New Year.

Twas the night before Christmas when all through the house not a creature was stirring, Louis Agreste thought to himself, not even a mouse.

Well, that wasn't entirely true. His big sister Emma was most definitely awake he had seen the lights of her TV flashing beneath the crack of her bedroom door when he crept past and undoubtedly Hugo was also awake because Louis had heard him chuckling to himself as he read something funny, and then, of course, Louis could see Mummy curled up on the armchair from his stake out position.

It was the night before Christmas though and Louis Agreste was on a mission!

He was going to prove that Santa Claus was real and then he was going to rub it in his big brother and sisters' faces.

It had broken his heart completely when even Dottie - who promised him earlier this year that the Tooth Fairy was real – said that Santa Claus wasn't real and he had moped all week until Mummy forced him help her bake cookies for Santa. Nothing beats baking time with Mummy and being the only one that licks the bowel.

Louis had cheered up just from the taste of cookie dough alone but then Mummy said something that helped too.

"Why do you bother making Santa cookies?" Louis had asked as he watched Mummy put the cookies into the oven. "Dottie says Santa isn't real."

"Really?" Mummy smiled mysteriously. "Because Santa visits me every Christmas."

And that was why Louis was out on a stake out on Christmas Eve. He was going to see Santa and he was going to take a photo and then he was going to be the one that knows best while Emma, Hugo, and Dottie will look silly.

Louis squirmed impatiently as the minutes ticked away and Santa still hadn't shown up. The night went on and on and on and nothing was happening! Louis was cold, bored, and fed-up. There was nothing he would like more than to go to bed and snuggle up in the warmth until morning but Louis was an Agreste. Not any Agreste, he was a Dupain-Cheng Agreste, and that meant he was more stubborn than he was sensible.

(According to Auntie Alya and Auntie Chloe that is.)

Louis' eyes drifted to a close when there was a sudden thumping sound that jerked him awake. Louis leaned forwards excitedly in time to catch sight of two black boots stick out of the fireplace they were quickly followed by red velvet covered legs (with white furry trim) and the finally a trim figure with a huge, bulging, sack of presents.

Huh.

Santa was a lot thinner and better looking than all of the pictures he had seen before.

Maybe he did Zumba like Auntie Chloe?

"Ho, Ho, Ho!" Santa called out. "Merry Christmas!"

"Merry Christmas," Mummy replied warmly, "you do know you don't have to go to this extent, right?"

"But Princess I like to purr-sonally visit those on my naughty list," Santa purred, "I have to ensure they're out of their stockings."

Louis pulled a disgusted face at that.

Santa sounded exactly like Daddy when he and Mummy thought they were alone. Really, really, icky and gross and urgh. This then made Louis really uncomfortable because would that mean Santa Claus was flirting with Mummy?!

But Mummy was married!

That meant she was off limits.

Santa could give Louis all the presents in the world but that didn't mean he was allowed to take Mummy in return.

Also Princess was Daddy's name for Mummy and no one else's!

"I thought you were supposed to be putting coal into the stockings not getting naughty people out of their stockings," Mummy replied in an equally icky voice that made Louis feel sick. "And you visit everyone on your naughty list? Should I be worried about whose stockings you've been trying to steal?"

"There's only one name on my list," Santa said firmly, "You've been a very naughty girl, Princess."

"Moi?" Mummy said in the exact same false innocent voice that Emma always used when she lied about stealing Tiki's cookies. "I've been good as gold."

"I've heard otherwise," Louis scowled as Santa invaded Mummy's personal space entirely. Mummy had stood up to greet him earlier and now they were stood so close that an ant couldn't squeeze between them. "You've been a tease to your poor husband."

"Fair is fair," Mummy slung her arms round Santa's neck and pressed up against him. "He's been a tease too."

Louis had to bite his lip to stop himself from shouting. He once thought Daddy had been cheating on Mummy before Emma explained that actually Mummy was the superhero Ladybug (and Daddy was Chat Noir!) so there was a small, possible, chance that Mummy wasn't having an affair with Santa but that Daddy was Santa.

He didn't know how that could be possible but he was going to give Mummy and Santa a chance before he barged in and told them off.

"Why Santa Kitty," Mummy purred in that really icky voice that made Louis want to vomit and turned Daddy into a sappy mess, "are you pleased to see me or is that just a really big present?"

Santa threw his head back and laughed at that.

Louis didn't get it.

That wasn't funny at all.

All of Santa's presents were in the sack and what would a really big present have to do with being pleased to see someone?

Grown-ups were just so weird!

"I am always purr-leased to see you, Princess," Santa said cheerfully. "But I do also have a purr-sent for you." Santa then suddenly pulled out a sprig of mistletoe out of his pocket and held it over Mummy's head. "Mistletoe,"

"As if I need the excuse!"

Louis' jaw dropped open as Mummy didn't even blink before she launched herself at Santa and kissed him.

It was a really icky kiss!

One of those big smooches that appear in the silly romance films Emma and Auntie Chloe like to watch together. With the disgusting slurping noises and the hands moving around each other and squeezing everything.

Ewwwwwwwwwwwwwwwwwwwwwwwwwww!

It was also Louis' last straw.

He was willing to give Santa and Mummy the benefit of doubt but all this icky kissing really took the cake. He wasn't going to let Mummy kiss other men that weren't Daddy!

So without a second thought Louis jumped up and stomped down the stairs before he placed his hands on his hips and shot Santa and Mummy his best telling off glare.

"That better be Daddy in a Santa suit or you're in big trouble young lady!" Louis yelled as he wagged his finger at Mummy. "I will tell Daddy on you!

"Louis!"

Both Mummy and Santa gasped out his name as they pulled apart from one another. They made a really weird, funny, noise as they separated. Kinda like when Daddy has to use a plunger for the toilet.

In any other circumstances Louis might have giggled at the funny noise instead he sighed in relief when he caught sight of 'Santa's' real face. It was undoubtedly his father in disguise though for some reason he was also transformed as his green eyes were greener, the whites lost to a sea of forests, and there was a black mask surrounding them.

"Daddy!" Louis cried out delightedly as he rushed to hug his father. Daddy happily wrapped his arms round Louis in return. "Why are you dressed as BOTH Chat Noir and Santa?!" Louis asked bewilderedly.

"Because," Daddy replied as he lifted Louis up, tonight "I'm not just Chat Noir and I'm not Santa, I'm Santa Claws," he stressed the pun with a very toothy grin, "Santa's pawesome helper."

Louis giggled at that. "Good one, Daddy," he praised his father. "Though clawsome would be better!"

"Oh God!" Mummy groaned, "There's two of them!"

Louis knew Mummy didn't mean it badly because she smiled at him and Daddy fondly before she leaned in and stroked Louis' hair. Before Louis knew it he was squeezed in between both parents on the armchair as he helped himself to the cookies he and Mummy had baked earlier.

(Ha! And Emma, Hugo, and Dottie get none at all! This was shaping up to be the best Christmas ever in spite of all the kissing he had to witness.)

"So," Louis said with his mouth full of gooey goodness, "How exactly did you become Santa's helper, Daddy?"

"Oh that is a good story!" Daddy exclaimed. "Well it all started when the real Santa got Akumatised thanks to Mummy-"

"Oh my God!" Mummy flushed with embarrassment. Louis vaguely remembers being told the story before. Mummy had thought that Santa was actually an Akuma already and had kidnapped Daddy. "It was a logical conclusion to jump to! How was I supposed to know you just went off for a teenage strop?!"

"Well the fact I was actually a teenager could have been a clue," Daddy said cheekily which earned an irritated huff from Mummy, "anyway," Daddy said loudly, "Mummy got Santa Akumatised which meant there was no one to deliver presents to all the boys and girls of Paris so-"

And then Daddy told a long, spell-binding, tale about rescuing Christmas and going to the North Pole and talking polar bears and icky kisses under the Northern Lights which Louis really could have lived without knowing.

Louis knew it wasn't the truth but it was such a good story that he listened without arguing. His limbs suddenly heavy with tiredness to the point he couldn't even keep his eyelids up. The darkness was so very warm and welcoming as Daddy's voice soothed him into slumber.

"….I think he's asleep," Daddy murmured quietly, "I'll take him to bed and you can put the presents under the tree."

"All right," Mummy replied softly, "I'll be up soon and then you can unwrap your Christmas present." Louis stirred slightly when he felt Mummy press her lips against his forehead. "Good night little prince," she whispered, "I'll see you in the morning."

There was another loud smooching sound which Louis knew if he was more awake he would be disgusted by as his parents kissed one another soundly.

They really do kiss way too much!

"Merry Christmas, My Lady."

"Merry Christmas, Kitty."

And to all, Louis thought sleepily as he remembered the poem once more, a good night.

He wondered if this meant Mummy was the Tooth Fairy….