Began in: 18/09/2016

Chapter 1: Delivery obtained, the first sister

Everything was okay within the Loud residence. And when we say 'okay', we mean there was arguments, broken stuff such as jars, explosions, you name it...

But anyways... While the girls were causing chaos in the hallway, Lincoln was in his bedroom, reading an 'Ace Savvy' comic book in his underwear.

He was so happily focused on his reading, until...

"LINCOLN!" he heard a girl's voice shouting as she barged in.

Startled, the boy tossed his comic book up to the ceiling until it landed on his head.

As soon as he got the magazine off him and saw that it was Lori, his startled expression changed into a frown.

"That's six times today you've called for me, Lori. So what is it this time?" Lincoln questioned, not exactly in a good mood.

"Listen, twerp - First off, I'm literally the oldest in this house. Which means, I'm the boss here, especially when mom and dad aren't around; And second, you have to change Lily's diaper. I already did that yesterday since I couldn't go to see Bobby." was all she said.

"Fine." stated the only male sibling with a groan as he got up and got dressed, before going to Lisa's and Lily's bedroom.

As he got inside, and noticing Lisa wasn't there at the moment, he walked up to Lily, who was in her crib.

The baby began to coo to her brother, seemingly glad to see him.

The boy picked her up and immediately was greeted by a bad stink coming from her diaper.

"Ewww. You really need to be changed." he commented.

Lincoln quickly grabbed everything he needed to get the job done - a new diaper, baby powder and some wet tissues to clean the baby's behind.

A minute after taking care of the said problem, he took the baby with him and went to the living room.

He then placed the baby on the couch and sat next to her.

Believing he didn't have anything else to do, Lincoln decided to play with Lily for a bit by tickling her all over.

However, their fun was discontinued as some knocking was heard on the door.

The white-haired boy soon got up and answered, revealing a person cloaked in black standing by the entrance.

The mysterious individual spoke with a male but shady voice: "Lincoln Loud, I presume?"

"Yes, that's me." he replied with some caution. "What do you want?"

The mysterious individual produced a small cardboard box from his cloak and handed it to Lincoln.

"I was ordered to deliver this to you." said the cloaked person.

Taking the item, the boy inquired: "Why's that?"

"I don't know." he simply answered. "I asked them about it, but they didn't say anything. Still, they told me to warn you that whatever you do, don't let anyone touch it. Not even for a second."

"Why?"

"If I were you, kid, I wouldn't take the risk to find out. I can assure you though, it will be something big." he warned for the final time.

"Have a good day, kid." stated the hooded figure, walking away.

Once the mysterious individual was a short distance away from the Loud residence, Lincoln closed the door.

Focusing on the delivery, his head was promptly overwhelmed with curiosity.

He opened box... only to find a blood-red sapphire with the symbol of a cracked heart on it.

"Huh? What can this be?" the Loud boy inquired to himself as he took it to get a better look.

Upon giving it a closer inspection, he noticed a small writting imprinted on it, it read: 'It only works on female subjects of any species.'.

He also discovered something else written, it read: 'NOTE: If the female caught by its power is still a baby or a toddler, then said subject MAY suffer some drastic changes.'

'What type of drastic changes?' the Loud boy wondered in his head for a second. 'Maybe I should show this to Lisa later, and see if she can discover anything.'

Lincoln decided to put the sapphire back inside the box for now, and put his attention on his youngest sibling.

He noticed his sister was still sitted on the couch and that she was watching him with an innocent smile.

The Loud boy couldn't help but put a smile of his own.

"So, you really want your big brother to play with you again, isn't it?" he happily told her.

Lily only responded with a giggle, meaning she was saying 'yes'.

"Alright, Lily, I'll play with you."

The baby got off from the couch and began to walk around the house, with Lincoln giving her a head start.

Once he thought he had given enough time, he started searching for her. He spoke, loud enough for Lily to hear him: "Ready or not, Lily, here I come!"

The baby quietly laughed as her brother played with her. She kept on hiding from him for a moment, until her eyes soon locked on to something...

After he was done searching in the kitchen, he went back to the living room and...

"LILY, NO!" Lincoln screamed as he saw her grabbing the sapphire from the now wrecked box.

He ran to her direction...

But before he could even touch her, the shiny stone glowed and instantly engulfed the baby, making the white-haired boy stop in his tracks.

Lincoln soon started to hear her, crying. Whether if it was in fear, in pain, or both... he couldn't tell.

As she kept on crying, the rest of the sisters ceased what they were doing and ran down the stairs to the living room to witness their baby sister in a nearly blinding light.

All of a sudden, the baby's screams began to alter and sound more mature.

Everyone present thought the same thing: 'Lily's changing?'

Soon, the light vanished, and from it... there stood a young woman on her knees on the floor.

The young woman had a short but straight blonde hair, and she had a pair of D-cup breasts... and, not to forget, she was stark naked!

All of the Loud children were awestruck to see their youngest sibling now much older than them.

"Lily...?" Lincoln started to say, still in shock as he slowly got closer to his former baby sibling, who was quivering.

"Lincoln?" she acknowledged him. "Please, Lincoln, help me. I'm so scared."

The Loud boy instantly went to her and hugged her, trying to help her relax.

"Lily, how are you feeling?" he inquired her.

"Better. I would like to go to my room now, please."

"I think it's best she goes to my and Leni's room." Lori quickly recommended.

The brother did as he was told and assisted Lily on walking to his eldest sisters' room. With the rest of the siblings following them.

While he was doing that, he made an effort to not stare at his sister's recently matured body. An effort that he found it challenging.

Once they were in the oldest sisters' room, Lincoln rapidly took a bed sheet and wrapped it over Lily, who was still trembling.

"Here you go, Lily."

"Thank you."

As soon as that was done, Lori got between them.

"Okay, everyone get out. Me and Leni have some stuff to do with Lily."

Lily then stated all of a sudden: "No, I want Lincoln to stay by my side."

"And you will, Lily." assured the 17-year-old girl. "But for now, it will have to wait."

With Lincoln and the rest of his sisters out, they all returned to their usual activities. Except for him.

He stood there by the bedroom's door for about an hour, barely hearing them talking, until they opened at long last.

And from it, there stood Lily in front of him, still shaking, but a little better. She was now dressed in a white shirt, some grey jeans, blue wristbands, and red shoes.

"I'm glad to see you decided to wait for me, Lincoln." she commented.

"And I see you're still shaking a little." said the Loud boy, before asking her. "How about we go for a small walk in the park, Lily? Maybe it will make you feel better."

The former baby sister happily answered: "I would like that."

While they were leaving, the other siblings came out of their rooms and wondered why Lily went with Lincoln all of a sudden.

"Uh... Can someone explain why Lily decided to hang out with Lincoln?" inquired Lana.

"Your guess is as good as mine." replied Luna, who also didn't know what to think about it.

Unfortunately, Lincoln had forgotten about the sapphire, which was left behind in the living room.

(WITH LINCOLN AND LILY)

The two were having a calm and nice walk through the park, taking the sights of the clear and sunny sky.

"How are you liking your day so far, Lily?" he kindly asked as they sat on a bench.

"It's good, Lincoln." she told him, without nobody noticing the red-pink glint in her eyes which flashed for a second. "But I think I've got something in my mind that could make it better."

"And that is?"

She just responded by pulling him into a hug.

"I love you, Lincoln."

"I love you too, Lily." he replied back, hugging his sister as well.

She happily shouted in her mind as she tightened her embrace: 'HE LOVES ME!'

"Lily... choking..." the white-haired boy barely managed to say.

"Oh! Sorry, Lincoln." Lily apologized, taking her arms off of him.

"It's okay."

After letting her brother recover his breath, the former baby decided to pop a question.

"So Lincoln, how are you doing?"

"I'm doing good, thanks for asking. Yesterday, Ronnie Anne and I went to go see a movie in the movie theater."

"And what movie was that?" the Loud boy was unaware, although his sister still looked happy, the mentioning of his girlfriend got her upset.

"An action movie." he replied with enthusiasm. "And the very first movie of Ace Savvy alongside his partner One-Eyed Jack, Ace Savvy: The Four Rings of Chaos. She and I loved it."

Little did he know, while he was talking with her, a group of three guys who were about Lily's current age came up to them.

"Hey there, beautiful." spoke the one in the middle with a stubble. "Would you like to hang out with us?"

Lily looked at them for a bit before averting her eyes.

"I'm not interested, thank you."

"C'mon girl, don't be like that." said the one on the left side of the previous guy, who was wearing a red baseball cap backwards. "Just ditch the kid and come with us."

"I said I'm not interested." she told them with a frown, beginning to get annoyed.

"Hey, how about you give us a chance?" inquired the one on the right, who was wearing black sunglasses. "You may like it."

Lily was about to tell them "no" again, but her brother spoke in her stead.

"Listen you three, if she says she doesn't want to go with you, you should stop bothering her."

The guy with the baseball cap gave him an angry look and threaten: "Stay out of it, little nerd... or else, you'll get my bat on your head."

That got Lily to stand up against them as she returned with a threat of her own: "If you dare to lay a finger on him, I'll break your bones."

"Ooh, we got a feisty one." arrogantly spoke the guy with the baseball cap before speaking to the guy in the middle and the guy with the sunglasses.

"Bradley, Flynn, what'd you say?"

"I say let's take her, Sean." affirmed Bradley.

Lincoln also got off the bench and confronted them.

"Hey, leave her alone!" he yelled at them.

Sean got in front of the Loud boy and prepared to swing his baseball bat at the kid...

When suddenly, Lily moved faster than anyone could see her, gripped one of Sean's hands, and broke his wrist with a loud crack.

The guy with the baseball cap cried out in pain as he let go of the bat and fell to his knees, while holding on to his broken hand.

That action startled both the other two grown-ups and her brother, and yet those said grown-ups didn't back off.

Bradley was going to hit her with a fist. Lily got down and then delivered a strong sweep kick to his leg, dislocating it.

While she was still ducked down, Flynn was about to get her from behind.

"Lily, behind you!" the white-haired boy warned her.

Lily rolled to the side as soon as the guy with sunglasses attempted to grab her, and then jabbed him on the stomach before slapping her hands on his ears.

With Flynn stunned, Lily took the opportunity to take his sunglasses, use them as a brass knuckle and smack him across the face... Not to mention, breaking the lenses with the impact.

Lincoln looked unsettlingly between his sister and the beaten ruffians. He had no idea if he should be glad to see that his youngest sister could fight back, or if he should be scared of her brutality.

He began to speak while trembling: "L-Lily?"

"Oh, hey Lincoln." she responded back, snapping out of her rage. "Are you hurt?"

"No, I'm fine. But I think we better return home, the sun is already setting." the Loud boy replied, trying to be relaxed while seeing the sunset.

"Ok."

On their way back, Lily smirked as she placed an arm around Lincoln and pulled him closer to her.

The white-haired boy blushed as he was feeling her boobs pressing against his head.

Trying to focus on something else, he decided to ask.

"So, while you were in Lori's bedroom, what was happening there?"

"Well, apart from her and Leni making me try some clothes and see which ones were better for me, Lori was wanting to take me to a shopping center with her." she answered. "Despite her insisting for me to go, I refused."

"You refused? Why?" he said, raising an eyebrow. "I think you would've liked it."

"Because I wanted to spent time with you, silly." she replied with her smile a tad wider. "And I don't think I would've liked it, at least not as much without you."

Once they had entered back in the house, all of the Loud siblings ran to their direction... Well, to Lily's to be correct.

"So Lily, how does it feel being older now?" began Luna questioning.

"Is it scary?" then Lucy.

"Would you like a cup of tea to calm your nerves?" then Lola.

"Or a frog?" and then Lana.

"Or would you rather hear a joke?" inquired Luan.

"How is your adaptation to your mature form?" spoke Lisa with a notebook and a pen in her hands, ready to take notes.

Getting bombarded with questions and not being given the chance to answer them was simply annoying for her.

She took a deep breath and then released it with a shout: "QUIET!"

Her yelling caused everyone to go silent as they looked a bit startled.

Lily took another deep breath before speaking in her normal tone: "Now, one at a time, what is it that you want to know?"

"How is your adaptation to your mature form?" the child prodigy repeated her question.

"Well, putting it simply, I feel fantastic. I feel more flexible and agile than before."

"Would you like to spar or play a sport with me sometime, Lily?" asked Lynn.

"Or play in the mud with me?" then Lana.

"Or play as a princess with me?" then Lola.

"Or maybe you want me to teach you how to rock and roll?" and then Luna.

The former baby sister answered them all with a bit of frown: "No; No; No; And no."

"How about a joke?" asked Luan.

"No."

"Then how about watching a bit of Dream Boat?" then Lori.

"Tempting, but no."

"Or a contact with the spirits?" then Lucy.

"No, I don't think so."

"Or a clothes' design?" and then Leni.

"Maybe some other time." she replied while adding with some pervertiveness in her head. 'And I'll gladly do it more often, if she lets Lincoln see me nude.'

Seeing that their sister had refused them all, the athletic Loud girl spoke: "If you don't want to do any those things, then what do you want to do?"

Lily simply responded, pulling her brother to her: "I want to be with Lincoln."

"WHAAAT!?" they all screamed in surprise, even the male sibling.

Before anything else could've been said, the door opened, and their parents walked in.

And at the moment their eyes fell on their former baby daughter, they stood there with nothing within their brains.

They had a funny feeling that they knew who it was, but they didn't know for sure.

"Uh... Is that you, Lily?" the mother, Rita spoke up, putting some effort to speak properly.

She kinda waved at them as she nervously responded: "Hi... mom, dad."

The father, Lynn Sr., placed his eyes on the child prodigy. An action that did not go unnoticed by the said child.

"Don't look at me, I'm not responsible for Lily's condition." stated Lisa.

"Then what happened?" the father questioned. "It's obvious that she didn't turn older because of nothing."

"I don't know. But, maybe Lincoln knows, he was the only one with Lily when it happened."

All of the people in the room soon turned their sights on the white-haired boy, who was feeling a bit under pressure.

"Lincoln, do you know anything?" asked his mother.

"I don't know what happened. I was just playing hide-and-seek with Lily, with her hiding while I would go search for her. Everything was going fine, until I suddenly heard her crying. I went to her, only to find her transforming." he half-lied.

Their mother and father took a minute to know what to do about the situation...

Lynn Sr. sighed as he announced: "Okay. From now on, until Lily can have a bed of her own, she's gonna have to bunk with Lincoln."

All of the siblings were shocked with that announcement, not counting with Lily, who was grinning inwardly.

'Lincoln is going to share his bed with me?' she thought with glee. 'This is getting better and better.'

"Hold on." spoke up the white-haired boy. "Why with me? Why not with Lori or Leni?"

Rita explained: "Because, dear, their beds don't have room for two. The crib and Lisa's bed are absolutely out of the question; Lola's and Lana's beds are too small; And Lucy's and Lynn's beds are barely big enough for her."

"But what about Luna's or Luan's?"

The prankster of the family replied: "I don't mind letting Lily have my bed, but Luna always sleeps with music playing in her headphones. Which means, I wouldn't be able to get any sleep."

"Then it's settled." Mr. Loud declared. "Lily will be sleeping with Lincoln, since his bed is big enough for two."

"Okay, I have to ask... but how old is Lily now?" Lola spoke up all of a sudden.

"Give me a minute please." said Lisa as she walked up to her room.

A moment later, she came back down with a strange device that somehow looked like a gun in her hands.

Everybody stared at her in confusion.

"I created just recently a lifespan recognition tool." the genius of the family told them. Seeing that they still looked confused, she simplified. "I made a device that can reveal how old any living being physically is."

She then went to Lily and pointed the device to her.

"Hold still for a moment." she recommended.

Her tool soon sent a beeping sound, indicating that the analysis was done.

Lisa looked to its screen and saw the results before telling them.

"According to my calculations, as of now, Lily is 19 years old."

They all looked stupefied.

"What!? Lily is literally the oldest out of all of us now?" Lori couldn't stop herself from asking.

"It appears so."

"Alright then, unless there's any more questions, let's all have some dinner and then go to bed." spoke their father, feeling like he was about to have a headache.

None of them said a word, they just moved to the dining area.

(LATER AT NIGHT)

Before all of the Loud family retired to the comfort of their beds, Lincoln went to the living room to quickly retrive the sapphire before anybody else could grab it.

Then he made his way to his own dormitory after drinking some water, and found Lily wearing a blue nightgown and already lying in his bed.

"Lily, how did you get that?" he inquired, indicating to her sleepwear.

"Lori and Leni have lent me some of their clothes, even some of their underclothes and pajamas."

"Oh, okay then." he said as he too went to his bed, after hiding the stone underneath it for the time being.

Although Lincoln could place his head on one side of the pillow while Lily was taking the other, he was having difficulty in falling asleep.

"Lincoln, are you having trouble sleeping?" the former baby sister asked, sensing his uneasiness.

The Loud boy suspired, answering: "Yeah. I guess I'm not use to having to share my bed with another person, not after Lynn and Lucy months ago."

'This might be my chance.' she thought with some contained enthusiasm.

"Try lying your head on my chest." Lily simply suggested.

Lincoln looked at her in surprise: "What?"

"I said try lying your head on my chest." she said again. "I assure you, Lincoln, I don't mind."

The Loud boy still felt a bit disturbed about it, but he didn't question her.

As Lily laid her head on the whole pillow, Lincoln did as she told him and laid his on her breasts.

"How are you feeling now, Lincoln?" she inquired, smiling to him.

"I don't know why... but, I feel so at peace right now." he happily said, his eyes beginning to close as he kept listening to the beating of her heart.

The Loud boy may not have meant to, however, he snuggled closer to his sister on instinct, while she wrapped her arms around him.

A few seconds later, Lincoln was sleeping soundly.

Lily was going to take the opportunity to steal a kiss from her brother... but, although she really wanted to do that, she held back.

"Calm down, Lily." she whispered to herself. "Let's not be hasty. All in due time, you will get your chance. Just be patient."

Instead, Lily placed a kiss on one of his cheeks and shut her eyes.

And before the sleep took a complete grasp in her, her last thoughts were these: 'Ronnie Anne, you may have taken his first kiss, but I got to sleep in bed with him before you did. And Lincoln, one day, I'll show you how much I truly love you. Not as a sister, but as a woman. Sleep well, Lincoln... my love'

However, even though everything was going okay with the Loud family, no one knew that their lives were soon going to take a dark turn...

Author's notes:

I've been thinking about this for a few months now. And Jump-Jump's comic and yugiohfan163's fanfic. named Dark Sibling Love with chapters of the Loud House gave me a bit of the inspiration I need to do it.

By the way, a small part of this chapter was ripped off from yugiohfan163's said fanfic, at least just the first chapter. I had already spoken with him about it and he said he didn't mind.

For yugiohfan163, I hope you're reading this - thanks for helping me with the idea for Lily's older design and the clothes she would wear.

I hope you folks liked it.

Still, I'm going to put this story on hold for now.
Because I'm going to focus my efforts on a new story for this year's Christmas. Hopefully, I'll get it done and posted in a day or two before Christmas arrives, or at least before the 25th day is over.

See you all next time!