Brian and Stewie ran up to Meg's room. Brian trying to open the door only find it locked "Damnit, she locked the door!" Shouted Brian.
"We don't have time for this!" Stewie ran up to the door, banging it hard as possible "Meg! Open the door, right now!" Stewie shouted.
"Go away! I don't want to talk to any of you, assholes!" Meg shouted back.
"Open it, you bitch!"
Brian moved Stewie away as he bang the door also "Meg you need to let us in. You have no idea what's going to happen." Brian trying to reason with her.
"Go to hell, Brian!" Shouted Meg.
"Ugh, to hell with this!" Stewie kicked the door open, as both of them quickly entered much to Meg annoyance.
"Hey! Get out from my room!" Meg yelled at them, getting off from her bed.
"Meg, listen to us! You need to take the antidote!" Brian reasoning with Meg.
"Antidote? What are you talking about?"
"To time to explained! You need to take it before it's too late!"
"I already told you! I'm staying like this! And no one is going to push me around anymore!"
"Meg, please!"
"To hell with this!" Stewie shouted, losing patient.
Stewie leaped onto Meg's face. The teen screamed as Stewie took out the nasal spray "Listen to me, moron! Any moment you're going to transformed into a she-beast! So, shut up and take the antidote!"
"GET OFF OF ME, YOU LITTLE BRAT!" Meg yelled with anger.
She grabbed Stewie toss him onto the wall next to Brian. Meg huffing, glaring at them until she felt a sharp pain. She clutches her chest as she starting to breath heavily. Groaning in pain as veins bulging all over. As soon, Stewie and Brian sees Meg in pain, they both know what it means.
"Oh God, no. It's starting!" Said Brian worried.
"We can still stop it. Once we nasal spray into her nose, she'll be back to normal." Said Stewie as Meg groaned loudly.
Meg transformation begins as she started to grow taller. Both her arms started to expand and her back widen as it tears her shirt in the middle. Revealing the valley of pure muscle as she groans. Her hair under her beanie started to move. The hair then ripped the beanie apart as it grew past her shoulder before stopping. Slowly becoming wild and feral. Her vocal cord expanded in her throat as her growling got deeper than before.
"We're running out of time!" Stewie getting back up "Let's rushed her!"
"What?!"
"Don't argue with me! We must stop it before she's fully transformed!"
Stewie then leaped again at Meg's, clutching onto her face. Confused Meg stumbled around in her room, destroyed her dresser. Then backed up and crashed into her mirror shattering it. Brian joined in jumping onto Meg's back. Another growth spurt hits as she grew even taller as her feet burst out from her shoes. Shedding her socks off, her calves tore the lower parts, while her thighs tearing the sides slightly, muscles erupting through. Meg's hands enlarged with her bones cracking and popping while her nails became longer and sharper like claws. She grabbed Brian and slams him onto the ground.
Meg then thrashing around growling to shake Stewie off, only for the toddler kept holding on around her neck. Her pectorals and breasts expanded. The shirt started to shred all over. Her stomach then developed a six-pack abs. Her guts caved in on her stomach as fat melts away, and the rest of the fat went into her ass. Her butt expanded which tore revealing her glutes and underwear. With her whole body swelling and in pain as she grits her teeth as her canine became fangs.
With Meg clutching her head as her shoulder muscles got bigger and rounder. Her torso expanded as her organs expanded to make room. Stewie saw his opportunity, took the nasal spray out. Climbed on top of her head, he jabs the spray into Meg's nose. Feeling the spray up her nose, Meg eyes widen in surprised before she shook Stewie off. Landing on the ground Stewie looked up with a beaming smile.
"Success! I sprayed the antidote into Meg's nose!" Stewie shouted in triumph.
"Then Meg's going back to normal?" Brian asked.
"Yes, any moment she would be back to her old self."
However, Meg shriek as she fell to her hands and knees. What happen next Stewie didn't expect. Meg undergoes another growth spurt. This time the transforming progress increased. Her muscular body became bigger and bigger. The last of her body fat left her gut, as it gets filled with muscle replacing the fat. Her hips widen with her thighs becoming beefier. Her pants get obliterate as her thighs quickly became huge. Meg bit her lower lip, giving out a seductive purr like a cat. Her butt expanded due to more body fat, with her glutes becoming more rounded and firmer making her underwear look like second skin.
Her hair exploded as it grew pass her whole back down to her butt. Meg purring got louder as her whole upper body grew shredding the last bits of clothing. Her bra hugs against Meg's growing breasts and pectorals. Her abdomen then formed an eight-pack as her organs expanded within. Feeling the final growth coming, Meg getting back up while her legs still pumping up with muscle. She gave a primal roar as her height shot up a few feet. Her hair then stopped growing as it stopped by her thighs. Her biceps pumped up a bit, with both her back and torso expanded.
With Meg's transformation is complete, her mind is completely gone. It's been replaced with something more primal. She is now standing 223cm tall, with her muscular body almost the same size as Lois. Meg huffing as she flexes her arms and gave a mighty roar.
She then turned her head around to see two beings. In her mind they're nothing more but prey. Stewie and Brian became horrified to witness Meg's transformation completion.
"I-It can't be!" Said Stewie utterly confused.
"Stewie… shouldn't Meg be cured?!"
"I-It should have!"
"RRROOOAAARRR!" Meg gave a loud roar as she slams her fists on the floor.
"Run Brian!" Shouted Stewie.
Both Stewie and Brian ran out the bedroom with Meg destroyed the doorway due to her massive bulk. She animalistic growls as she went after Brian and Stewie. However, Peter walked up the stairs only to meet the Amazonian Meg.
"Excused me kind, sir. I believe you got the wrong house." Said Peter not realizing it's Meg (which he doesn't care about) "Would you be kind enough to leave my home before something bad could happen?"
Meg gave a powerful punch onto Peter's face with her right fist. Blood came out from Peter's nose from contact. He then fell down the staircase, hitting the wall before landing in the living room. Peter clutches her nose with blood gusting out with both of his eyes blacked and bruised on the bridge of his nose. His whole body covered with bruises, his hair messy, and glasses broken from the punch.
"Oh my God!" Peter looked at his bloody hands "Justin Roiland voices both Rick and Morty! I just figure it out. Guess I owned Joe twenty bucks." Peter took out his phone and text Joe.
Swanson's House
Joe got a text from Peter. He looks like it then frowned.
"Took ya long enough." Said Joe annoyed.
Griffin's House
Stewie and Brian barricade the door as Stewie is on the computer. With Brian pacing behind him, freaking out. While Lois is still inside her cell trying to break free.
"This isn't happening! This isn't happening!" Brian repeated the same sentence.
"Brian stop pacing around! I'm trying to concentrate!"
"Can't help it! Shouldn't the antidote able to cure Meg before she turned all Amazon on us?!"
"The cure should've worked! Unless-"
"Unless, what?!"
"Uless I'm mistaken, the cure was working."
"Working? What you mean?!"
"Listen for a second. The cure was about to work, but the serum must have realized the threat and quickly accelerate the transformation progress."
"You mean the serum quickly made antibodies and cause her body to change quickly?"
"Yes, there was 99.9% chance the cure would work. But in order to keep the evolution progress from being reversed. Unlike with Lois transformation, which cause a steady pace, it quickens the progress on Meg in order to stop any intruders interrupting it's work."
"You mean if we get her to take it in time she would be back to normal?"
"Yes, before the change starts. But now with Meg now fully transformed, the cure didn't work."
Suddenly, the door started to bang. Both Brian and Stewie both watch as dents appeared on the door. Just then the metal door sent flying off the doorframe. Meg then entered the room snarling like a wild dog while her mane-like hair flowing with anger. Stewie and Brian backed away until they got cornered.
"Looks like this is it, Brian."
"It sure looks like it. Stewie, if this is how we're going to die, I need to you something. You're the best friend a dog could have."
"Thanks, Brian. There's also something I need to tell you. You're the worst writer I ever known."
"Oh, c'mon! That's the last words you're going to say to me?!"
"Hey it's true. And the audience starting to hate you since you became a jerk."
"Hey, blame the directors and writers! I didn't ask to be a huge dick on this show!"
"Then stop being a dick just because you can't get one single girlfriend to last more than a month."
"I'm starting to take back what I said about you!"
"RRROOOAAARRR!" Meg roared as she rises her arms with her fist's clutches.
Both Stewie and Brian closes their eyes as they accept their fate by Meg's hands. However, when Lois stopped struggling, she then saw Meg. Lois then started to snarl as veins appeared on her face. Feeling a new source of strength, she then started to pull even harder. Putting one foot on the ground she then pulled with every ounce of strength. The cuff on her right hand started to crack as Lois growled then scream as the cuff then shattered. With her right hand free, she uses it to break the other cuff of from her left wrist.
Standing up she rises both fists' then stated banging on the glass. Hearing banging Meh looked to her right, while both Stewie and Brian look towards their left. They see Lois bashing the glass with full force. The glass then started to crack despite of it being 6 thick. She then started to punch the glass which cause the glass to crack even more. Raising both fists one final time she then smashed through, freed from her containment prison. Without warning Lois then sucker punch Meg right cheek with her left. Stumbling back Meg find her footing as she stood her ground.
Meg then snarled in anger as she glares at the newcomer. Lois with her fingers curled with her claw-like nails as she growled. Lois flexes her arms, shoulders, and chest as she roared like an angry lioness. Same goes to Meg only hunch over. With both Amazons staring down at each other Stewie and Brian just kept staring at them, stamped was happening.
"W-What's going on?" Brian asked.
"I-I don't know. But I've got a bad feeling this won't be pretty." Said Stewie confused as Brian.
Both Amazon Lois and Amazon Meg ran towards each other leaving a footprint dent on the floor. They both locked their hands together as they try to push one another. Both of them growling, Meg then headbutt Lois forehead. Lois let go Meg's hand not before she gave a kicked Meg abdomen with her right foot. Both of them stumbled back with Lois place her hand on her forehead. Meg, however, quickly charges and tackled Lois while the latter was caught off-guard.
Meg and Lois crash though the window leaving a large hole behind. Lois landed on her back on the lawn, but she then places her feet onto Meg's abdomen while grabbing her armpits. Using her legs muscle, she tossed Meg airborne. Meg flying upside down flew and landed on a car side parked on the street. Crushing it with her back while upside down. Lois then rolled and got back to her feet. She then charges at her. While the former got back to her feet she then charges at Lois. They both punch each other at the face with Lois swing a right hook and hits Meg's left cheek, while Meg throws a left punch which connected to Lois right cheek. Both of them stumbled backwards. Meg then charges at Lois who swings a left jab. Meg ducked and ran around her.
Grabbing hold onto her waist with her arms she then lifts her up. And powerslam her leaving a large crack, once Meg gets back up. Lois already recovered, she then kicked her at the left side of her gut. Groaning in pain Lois then grabs her and lifts her up. She then slams her on the ground. Meg then grab hold onto Lois arm and then toss her and slammed her also on the ground. However, Lois then grabbed her arm again, this time over her shoulder. Meg felt her arm being pulled before being toss overhead.
She then crashed onto a passing car which killed the driver. Falling onto the Meg sees Lois charging and leaping towards her. Meg then rolled out the way grabbing the car as Lois smashed onto the ground. Leaving a small crater. Looking at her right, Meg lifts the destroyed car and swing it. Hitting Lois but the red-head Amazon manages to stop it by blocking it with her arms. She was then pushed back leaving a trail of her feet dragging the road.
Dropping the wracked car Meg ran at her in full speed and deliver a powerful punch onto Lois abdomen. Coughing a bit of blood Meg then threw a left punch onto Lois right cheek. However, Lois then elbows her at the chest. Meg then swing a right kick on Lois left leg. Lois groaned in pain fell to her one knee, Meg grabs Lois head then procced to knee her at the face on her nose. With blood gushing out Lois then opened her mouth then bit the leg that kneed her face. Meg howled in pain as she threw both hands onto Lois head cause her to let go.
Meg stumbled back looking at her leg. It wasn't deep despite with blood oozing out. She, however, grits her teeth and glared at the red-head Amazon who wiped the blood off. Meg then roared and tackled her, but only to pushed Lois back a bit. Lois then delivered a powerful elbow onto Meg back, causing her to let go. Lois the left knee Meg's face, which Meg in returned an uppercut on the chin. Meg then tackled Lois again only for her to side-step and grabbed Meg's long hair. Feeling a tugged on her hair Meg tried to kick her but only for Lois to spin her around with her hair.
Lois then threw Meg towards a house down the street. Crashing into it cause the residents to flee from their destroyed home. Meg walked out the house through the hole, snarling in rage. She then charged at Lois, who also charge at her. By the time they got close to each other, Lois dodge Meg's right fist then grabbing her face with her right hand. Slamming Meg's head onto the road left a dent. Trying to break free from Lois grip with Lois procced to dragged Meg body on the ground. Leaving a trench trail.
Lois kept running until she threw Meg back at the house only this time through the ceiling. Getting back up Meg gets tackled by Lois who both crashed through the house. Leaving behind destruction as the house was left standing while the two Amazons continue their brawl.
Stewie and Brian watched the whole thing from the destroy window. Both of them were left stun at the display they witness.
"Oh my God, this is bad! They're going to kill each other!" Shouted Brian.
"Kill each other? Perhaps this isn't all bad. Meg will kill Lois for me and save me a lot of trouble." Said Stewie smiling.
"Now's not the time Stewie! We got to do something!"
"Oh, you're right! It isn't the time for me think about killing Lois!"
"Stewie, why are they fighting anyway?! Don't they know they're family?"
"I'm afraid not, since they both progress back to their primal instinct. Both of them thinking their trespassers invading their territory. They'll keep fighting until one of them is dead"
"Oh my God! Oh my God!" Brian pacing back and forth "What are we going to do?! If we ever turned them back, I'll stop shedding my fur on the carpet!"
That's when Stewie an idea "My God that's it! Why didn't I think of it before?" Stewie ran out the room with Brian standing alone.
Stewie then came back with Lois shirt and using a magnifying glass he found what he's looking for. Using tweezers, he carefully picked up a strand of hair. Brian confused as he watches Stewie doing something with Lois shirt.
"The hell are you doing, Stewie? What you got there?" Brian asked.
"Lois strand of hair from the shirt she wore last week."
"A hair? How's that going to help?"
"My serum has changed Lois DNA with newer ones. But Lois hair I'm holding still have her old genetic code. I might use Lois hair to make a antidote which can disguise itself from those antibodies."
"Are you saying that using Lois old DNA can change her back?"
"Yes, that's what I'm saying. But I need to run some simulations to see if it does work. Go get Meg's hair from her room. And pray to God it works."
"I hope so too, Stewie. I hope so too." Brian left to get Meg's hair while Stewie start to run simulations on the cure.
None of you thought this became a fighting story, huh? Yeah, so Lois and Meg will be fighting against each other through the story. And hoped Stewie make the cure in time. Also sorry for the long wait.