It was every day that weird things occurred in the Loud house, but even a rapidly aged sibling was a little much for their day to day craziness. So it didn't come as a shock when after thoroughly explaining to Lori what had transpired during the day, each Loud tried to adapt back into their regular day activities while Lisa continued to clean out her Lab in preparation to further study Lily's 'condition'.

It was getting later into the evening. The warm evening atmosphere was perfect for light recreational activities.

Lincoln lay sprawled out on the couch clad in his undies, reading the latest issue of Ace Savvy. With the unusual quiet, he couldn't miss this opportunity to relax and fully enjoy his Saturday.

He relaxed further into the couch, flipping pages contently and letting the sun light from the window bathe his open skin. Suddenly, a shadow washed over him, cutting off that comforting light he was using to read. He looked up to the source, ready to swat them off, when he blushed and quickly looked back to his book.

Above him stood Lily, once again naked, clad in only a pair of panties. "What're you doing Lincoln?"

Her tone was innocent, child-like even. She leaned in a little closer to get a better look at the page he was reading, giving him a very close eyed view of her perky nipples.

Lincoln shifted back a little, trying to create a little breathing space between her and his face.

He gave her the best deadpan look he could muster, although the deep blush on his face betrayed him. "Lily, why are you naked?"

Lily looked down at herself, a slightly perplexed expression coming over her face, before looking back toward him. "I'm always like this."

"Yeah, but you're older now, you need to cover yourself up!"

"Lori doesn't mind." The blond tween moved back and swayed over to stand in front of him. "Plus clothes are too uncomfortable, I feel better without them."

She turned and plopped herself onto his lap, wiggling her hips cutely in an exaggerated display of getting comfortable, before laying her bare back against Lincoln's shirtless chest. He couldn't help the cherry red that spread from his eyes, almost down to his neck.

With every possible fiber of being within him, he struggled not to pop a boner right under his innocent little sister. Sucking in a breath, he mentally scolded himself, forcing all the self-control he could fathom. This was his sister. Not just some girl at school, but his cute not so little sister.

Lincoln physically relaxed, though he was still tense. Letting out a calm breath, she adjusted his comic book so he could view it over her shoulder, leaning further into the comfort of the couch. "Alright then, if that's what you want." They sat there, silently reading, but Lily was restless, squirming on him as the silence stretched out for too long.

Their breaths simultaneously hitched as two sensitive spots brushed briefly.

Lincoln's face if seemingly possible seemed to deepen in its hue, while Lily giggled at the feeling. "That tickled."

Blood began to flow to a lower organ as his underwear became a little too constricting, steadily poking at the heat above. Lily's breaths became uneven as she instinctively moved her hips in response, her giggling stilled as small squeaks and moans escaped from her lips.

Lincoln sat perfectly still, as his member continued to inflate beneath her, resting in between her thighs now as her speed steadily increased and…

"Lincoln! Would you mind coming up here?!" A voice snapped him from his lust induced trance.

"Coming!" He yelled back as he sat up a little too quickly, unintentionally throwing Lily off with a yelp.

He grimaced as she groaned beneath him. "Sorry Lily." The blushing boy apologized, pulling up his pants over one leg as he hopped with the other towards the stairs. Sparing a backward glance at the stairs as raced upward, he caught a glimpse of Lily pouting sadly, watching him run up.

He ran his fingers through his hair as he reached the top of the stairs. "Well, that wasn't awkward at all." He sighed as he reached his destination, shame changed to curiosity. "I wonder what Lisa wants though." Entering her bedroom, he watched Lisa rammed her shoulder onto a vacuum cleaner, stuffing it into her closet, shutting the door quickly to prevent it falling out

She acknowledged the boy's presence in her room. "Ahh Lincoln, there you…" She paused, taking in his state of partial undress. "Where's your shirt?"

Glancing down at himself, he realized he forgot his shirt downstairs in his rush.

He shrugged. "I was reading comics so…" He left out the part of being ridden by their sister.

"No matter." She waved it off. turning around and picked up a notepad, adjusting her glasses as she flipped through the pages. "I called you here to discuss a few things."

"Ok, I'm all ears."

"You might want to sit down for this." Lincoln looked at her suspiciously, but went to sit on her bed without a word.

She took a small breath, standing in front of her desk. "Well I've been running some tests using samples of the gas, and I noticed some things."

"Like?"

"Well, I performed some tests on a few of my Lab rats."

Lincoln's face went white.

"Actual Lab rats." She sent him a deadpan expression.

Lincoln sighed. "And I came to some raw conclusions. Firstly, I took a newborn rat and exposed it to about five minute of the gas." She paused, flipping through some pages before continuing. "It grew in size, but still seemed to show normal characteristics like going to its mother when hungry. This is similar to Lily's case."

Lincoln nodded. "Then I took another newborn and exposed it to a full twenty minutes of the gas, and I noticed something else. It grew extremely old, wrinkled and weak. It died a few minutes later, but from what I could gather, it didn't seem to be different from the other, only that it grew much older, due to much longer exposure."

Lisa bit her lip nervously as she waited for realization to strike him. His eyes widened as he did, all color leaving his skin as his breath hitched.

"So, Lily was exposed to the gases just enough for her to fall around my age range." His mouth went dry. "Oh God, what would have happened if you hadn't taken her out when you did. She would probably have aged even more rapidly." He bounced up, moving towards her and gripping her shoulders so hard it hurt.

"She could have died."

Lisa looked down in guilt, shuffling her feet nervously as Lincoln glared at her in fear and anger. "Yes… I am aware of that possibility. But I am just happy that it didn't happen."

He calmed down s little. "Yeah…" Shaking his head to clear negative thoughts and releasing her from his death grip, he staggered a little as he made his way to sit down on her bed again. "Yeah. Just be careful next time. We might not be as lucky in the future." Lincoln warned, the thought of losing one of his sisters becoming all too real in his mind.

"Of course, I already have multiple added safety precautions in place, and I plan to move most of my Lab down to my Luan prank bunker."

"Alright then. Well, is that it?" He really needed to get out of here, He suddenly got a really creepy vibe.

"Actually, no, I have made some other discoveries." She flipped to the next page in her notes. "Added investigations reveal an actual change in the subjects' behavior. They seemed to be more aggressive, showing signs of competition and increased affection towards their mother." Lisa closed the notepad. "And from what I have noticed, Lily may show the same symptoms."

"Well, now that I think about it, she has been a little clingy." He blushed as the events that occurred downstairs.

Lisa continued. "Yes, but I fear there may be something more to this."

The young scientist dropped her notepad, facing Lincoln with all seriousness. "For a long while now." She began moving to sit beside him.

"I have noticed a change in Lily's behavior towards you. She is always happy and never cries when around you and she seems to always be eager to play with you. It may be far fetched, but I had come to a conclusion that she had developed a bit of a crush on you."

Lincoln choked on his own spit.

"At the time, I did not take much note of it. Few children form small insignificant crushes on their older siblings that fade away over time. But now with this incidence, there are multiple factors that make this more dangerous. For instance, with the effects of this gas amplifying her emotions, her crush on you would be amplified into something different…"

She turned away from him, a distant look in her eyes. "Something horrible."

She cleared her throat looking back at him with a neutral expression. "Adding to this, she has aged to an age where puberty should have a good effect on her."

"So… what are you saying?"

"I am not saying anything except that you should be a little careful around her. She may not be in a normal state of mind, and with all these emotions swirling around in her head, who knows what she might try to do."

Lincoln sighed. "Alright." He contemplatively placed a hand to his chin in thought. "Who else knows about this?" His sisters definitely wouldn't take this news well.

"Just the two of us." Lisa concurred with his thoughts. "Knowing our siblings, they would make a ruckus about all of this which would be particularly disastrous at this time." She shrugged nonchalantly as she hopped off the bed and moved back to her desk to continue her work. Her back to him. "You are free to tell anyone you wish though. It's your decision."

With a sigh he got up too. "Sure." He moved toward the door, intent of getting back to his reading. "Thanks Lisa."

"I will continue to run more tests until I am able to fashion a cure. Till then, just… Don't do anything that stupid."

Lincoln paused intrigued by that last statement. "Stupid like…"

"Don't have sex ok." She almost yelled as she pressed a button on her desk and a panel opened underneath Lincoln's feet, flinging him out of the automatically opened doors, landing comically with his butt to the air outside her room.

Although he could swear that before his impromptu flight, he had caught the barest hints of red on the cheeks of his sister.

Standing and ignoring the slight throb of pain in his knees, he turned to descend the stairs and continue his Saturday pastime, but he froze upon hearing distinct voices from downstairs, one in particular standing out, as flashbacks of what had happened not up to an hour ago filled his mind.

Blushing profusely, he quickly U-turned and walked into his room.

"Yeah… I have more comics in my room." He muttered as he shut the door.

0 – 0 – 0 – 0 – 0

Lincoln sat on his bed playing video games on his portable console, already in his PJs, and ready for bed.

"Lincoln, you got a sec?" Lori's voice came from the other side of the door.

Lincoln rose a brow at that. Lori coming to his room meant she needed something.

Regardless, he paused his game. "Yeah, come in."

Her head poked in. "Hey little bro, I need to ask a favor." There it is.

He sighed, moving his legs over the side of the bed to stand up and give his sister his full attention. "Sure, what do you need?"

"Can Lily bunk with you tonight?"

Lincoln's eyes bulged. He had heard correctly. "What, why me? Isn't there anywhere else?"

She entered the room to fully face him. "Well, her crib is definitely too small for her now, and all the rooms are already cramped enough for the people staying in there." She sighed he could almost see a vein pulsing on her head. "Plus, she literally would not stop begging for her to stay here."

Lincoln really hoped this wasn't a big mistake he was making right now. He slowly plopped down on his bed, and reclined as he made his decision. "Alright, I guess its ok."

Lori smiled. "Thanks twerp, you're the best." She headed back into the hall.

He was going to bed anyways. Not like anything can really happen from her bunking with him.

A few moments into his internal debate, Lily opened the door with a huge smile on her face. She wore a large red jersey over her whole body that barely covered her hips, and sagged around her shoulders. It was probably one of Lynn's.

He couldn't help but notice the extra bit of skin it showed as it sagged around her bust. He could see as it curved lower into the fabric, and if he squinted, he could make out the slightly change of color from the pale red of her skin to a slightly pink…

She walked into the room and sat on the edge of the bed, jolting him out of his 'inspection' causing him to blush deeply. Since when were Lynn's shirts so big? "Thanks for letting me stay here Lincoln."

"No problem Lily." He took a breath to steady himself, closing his eyes and concentrating. With a smile he opened his eyes and was delighted as he pictured the baby of the house gawking at him instead of the girl that had started making his mind turn crazy. He smiled as she cutely tilted her head in a grin. Ruffling her hair, he stood up to pack up his devices to make room on my bed. "Anything for my favorite little sister."

Lily's smile became unbelievably larger. "I'm your favorite?"

"Yeah." Lincoln yawned, shutting his drawer and flopping on the bed. "But we should probably get to bed." It was getting pretty late.

"Ok." Lily lay down as Lincoln turned off the light and pulled the blanket over them. She instinctively snuggled into his warmth. He tensed initially but relaxed as his eyes became droopy. "Goodnight Lily." He said with another yawn.

"Goodnight Lincy." She turned and watched him as his eyes closed and his breathing evened out. Her palms caressed his forearm that she clung to, raising to his shoulder before slipping and cupping his chin turning his face towards him as she continued to stare at him breathlessly, a new feeling coming to her mind as his warm breath ghosted over her face. "I'm his favorite."

Author's Note: Got some light buzz last chapter and it amped me up to continue this. Next chapter will be out hopefully soon.

Peace!