Author Note: This is my first Sherlock fanfiction and I hope its good enough for you all; I'm terrible nervous to post this story. This takes place before The Great Game and after The Blind Banker; Moriarty will, hopefully, be a main character along with Mycroft, Lestrade and our favourite consulting detective and his blogger. Irene Adler will be present in this story and I plan to get Moriarty and Sherlock fighting on the same side for a large amount of the story to protect Marilyn. I won't wreck anything else for you all.

Warnings: Mystrade, Sherlock/OC, a bit of Sherlock/Irene and a large amount of MorMor. Violent deaths, contains bad language, sexy times, family times, drugs, killings, Angst; jealousy, devotion, gory descriptions, BAMF Mycroft/John/Sherlock/Marilyn/James/Sebastian and much more. Might be a bit OOC; but I'll try not to! Enjoy and please review!

Any mistakes are my own; I do not have a Beta for this story.

CHAPTER ONE

Mabel Davidson

Marilyn Moriarty is the complete opposite to her half-brother James Moriarty. With her long golden hair and sculpted features, she looks more like a model than a Government Detective. Her slender neck leads to her broad shoulders, towards her hourglass figure and firm bottom. Her rounded breasts and never-ending legs often catch the attention of most straight - and sometimes gay - men. She is beautiful, her sun kissed skin blends in nicely with her golden - nearly strawberry blonde - hair and her liquid but clear blue/grey eyes.

Not only are her looks the completely different to her beady eyed, sharp-looking brother. Her personality is different too. James is cruel, vain and selfish whilst Marilyn is generous, polite and vivacious. However, they do have some things in common. They're both incredible clever, many people have gone as far as to call them geniuses. Their intelligence is well above average. They're both bad-tempered and manipulative, but the main flaw for both of them is their fixation for playing dangerous games that involve the harm of others.

Marilyn knows when the game gets too dangerous - when its time to stop, however James never knows when enough is enough and that's how they went their separate ways. Marilyn went on to gain a minor position in the British Government whilst James became addicted to the long-lost games of murder.

X-X-X

"You better behave, Marilyn! There is a mute button! And I will use it!" Marilyn's assistant - Mayleen Harper - warns as she peers down at the bright-eyed politician through the webcam of her laptop.

"You've repeated yourself six times now, Mayleen! I will keep my mouth close unless it is useful evidence - I promise." Marilyn replies, eyeing her dark-haired assistant. She continues brushing her light hair as Mayleen turns around; walking through a doorway before she stops again.

They got the phone call from Marilyn's closest friend - Mycroft Holmes - who informed them that a recent brutal murder of a young woman has just taken place in London. Marilyn didn't even bother looking at the case file that Mycroft had sent - through email - to her about three hours ago, it was only when Mayleen started threatening her with banning cake from the flat that the blonde woman looked at the case file…

She was instantly fixed.

The murder of a 24-year-old Mabel Davidson. The victim was raped before and after she was shot in the head with a shot-gun. She was also sodomized and then repeatedly stabbed in the anus with a knife. Her organs were then removed and half eaten, her breasts left clean from blood or any knife mark. Her hair was also clean of any blood and her eyes left wide open. Davidson's right hand was then removed and with the blood, the murderer wrote two words on the wall:

Marilyn Moriarty

The blonde politician has seen and solved much more gruesome and bloody murders than this case. She has also solved many murders that have involved her name or her world-famous surname being wrote on something - thanks to her half-brother. She sent Mayleen over to London from where they were staying in Berlin after just finishing a manslaughter case.

"I'm passing you over to Detective Inspector Lestrade. Behave, please!" Mayleen says, her dark brown eyes pleading as Marilyn gives her an impish grin, putting down her hairbrush and facing fully to the webcam. She quickly makes sure her white shirt is covering her cleavage before she comes face to face with the DI.

"Hello…" Lestrade mutters, shyly. His cheeks tinted red as Marilyn sends him a small but charming smile, "I'm Detective Inspector Lestrade. Mr. Holmes has told us all about you."

"I hope he hasn't, detective. Otherwise you would be putting handcuffs on me now." Marilyn winks, chuckling at her own joke. Her past is dark. In her teenage years, Marilyn did many things she regrets and on through her early twenties when she started building The Moriarty Web. She manipulated and played with people's mind. I moved on though: I'm that person anymore, Marilyn thought quickly to herself.

Lestrade grins crookedly at her before returning to a neutral bored looking face. He awkwardly moves the laptop in his hands as Marilyn eyes him quickly:

Grey hair but soft wrinkles - early forties then. Love bite on his neck, hidden mostly by his shirt collar as is he's ashamed - secret lover maybe secret gay lover. Looks after his teeth but a spot of shaving foam on his chin - lives alone. Dog hair on shoulder - Golden Retriever. Stain of baby food on shirt and bags under his eyes from lack of sleep - been looking after a young child possible siblings or his own. More likely his own. Possible three more children - four in total.

"Call me Marilyn." She says, breaking out of her deductions with a slow blink.

"Greg then." The detective responds, looking over the webcam and muttering a line of swear words. "We have the younger Holmes brother coming to have a look at the scene again." Greg informs Marilyn as he quickly passes her back to Mayleen.

"He's cute." Mayleen comments, as if forgetting about the dead body in the next room. Muffled shouting can be heard as Greg closes the door behind him, locking the assistant and the laptop in the average looking kitchen. The worktops are marble with a kettle, toaster and bread bin behind Mayleen, the walls are off-white. That's all Marilyn can see as they wait for confirmation to be allowed in.

"He also has four children, a secret gay lover and is in his early forties. You are the complete opposite, Mayleen. You have no children, your straight and you're in your late twenties." The politician/detective replies quickly, looking away from her own laptop and biting a slice out of her toast.

"Maybe I like older men." Mayleen mutters back, more to herself than to her friend. Marilyn only raises a perfectly plucked blonde eyebrow back. Silence starts as the blonde continues eating at her breakfast, Mayleen looking around the modern kitchen.

"You can come in now," Greg calls from the doorway, before ducking quickly out and leading the way. "Be careful, it's bloody," Greg warns, looking down at Mayleen's two-inch black heels, jeans and cream blouse, "And it's getting rather smelly."

"How long has the body been here for?" Mayleen asks, her heels clicking softly on the wooden floors.

"About two hours now – possible three hours. Maybe even longer."

"Wow, Mycroft got them case films sent quickly to us." Mayleen comments as the door leading to the dead body is pushed open. The assistant quickly pushes down her gag and continues into the room, her eyes scanning the wall where the writing is.

"Mycroft is getting slow." Marilyn snaps back, leaning towards the laptop. Mayleen turns the laptop around, showing her blonde friend the murder. Two men are in the corner as Greg joins them. Turning her back to them, Mayleen waits for instructions.

Everyone stays silent. Only the slight muffle sounds of the Forensic Services packing away can be heard through the floor of the house. Mayleen looks quickly around the empty room. The walls are well painted and the floors a dark wood, a painting of a nude blonde woman is on the opposite wall to the blood writing. No windows or furniture.

"Move forward slightly." Marilyn commands, her strong posh English accent slicing through the silence and making the men in the corner shift. Doing as she asks, Mayleen quickly shifts so she's closer. The smell of blood rushing into her nose, making it hard to hold down a gag as Mayleen gets nearer to the dead blonde.

Mayleen then looks at the woman, her chest heaves in sympathy. The woman's ash blonde shoulder-length hair is spread out across the floor. Light blue eyes staring up at the ceiling. Lips open. Freckles covering her cheeks. Rounded shoulders. Perky breasts. Hourglass figure. Short legs. Large feet. Her whole body but her hair and breasts are covered in blood. Her stomach is cut wide open, revealing her intestines and even her ribcage. All her clothing has been removed as well, except her jewellery which is a necklace, bracelet and…

"Where is her other hand?" Marilyn asks, breaking off Mayleen's line of thought.

"What?!"

"Her hand! Her right hand, Mayleen!" Marilyn snaps, the assistant looks up at the three men. Greg's holding up a bag, containing a feminine hand.

"It's here. Want me to get it for you?" Mayleen asks, breathing deeply to control her anger. As much as she loves her dear friend, she has a short temper and Marilyn pulls her strings far too tightly.

"No, it's not relevant." Marilyn replies, in a snappy tone. Her tone of voice sounding deep in thought, properly pulling all the deductions into ideas, "I need to see her wedding ring, take it off for me and hold it to the camera."

"There is blood on the floor. How am I meant to do it without getting blood on the laptop?" Mayleen hisses back, her temper pushed to its limit. It would be so much easier if she just came! Mayleen thought bitterly to herself.

"Use your brain! God knows it has to be used for something!"

A soft chuckle comes from one of the men, making Mayleen look up at them to smile quickly at the shortest of the men. He has thick dark blonde hair which has highlights of grey in. His hair is in a neat style, showing his smooth wrinkles which oddly enough made him look younger than older. His dark blue eyes are alight with humor as he looks back at Mayleen. She notices that his posture is straight and stiff: screaming military.

Blinking and looking away so it doesn't look as if she's staring, she takes the plastic sheet off Greg and places it on top of the bloody floor. Gracefully leaning down to place the laptop on the protective sheet, she quickly grabs a pair of gloves then swiftly takes the wedding and engagement ring off the corpse.

The engagement ring looks rather new, the diamond shining. However, the wedding ring looks old; scratched but polished. Holding the rings up to the camera, the angle the webcam is pointing at makes it so the men can see Marilyn close at work.

Her eyebrows scrunch together, creating frown marks and making her large eyes squint. Her looked-after teeth are gently biting at her lower lip as her hair frames her face. Her shirt is dramatically showing her cleavage as Mayleen notices the politician isn't wearing a bra on underneath, showing the faint outline of her rosy nipples.

"Interesting." Marilyn comments, making her assistant snap her attention back to the blonde woman's face. Mayleen leans forward, her full attention on her friend's face as she tries to figure out what Marilyn finds so fascinating.

"Care to explain?" Mayleen says slowly. Greg and the short man moving slightly as if hoping for Marilyn to explain more about the murder. The taller man whose body and half his face is covered by the collar of his Belstaff coat stays where he is.

"I'll be getting the first plane to Britain, Mayleen. I expect Mycroft has already got a private jet ready for me. I shall see you in less than two hours." And with that the genius ends the Skype call, leaving Mayleen staring open-mouthed at the laptop.

Her phone pings in the background, alerting her to a text:

Won't need the crime scene. Just the body. They can pack away. Make sure nothing is messed with! -MM

Shaking her head, she gives the instructions to the DI before shutting down the laptop and getting up off the floor. Carefully placing the rings in a plastic see-through bag, Mayleen makes her way out of the house and onto the street.

"Mayleen Harper?" A man with reddish-brown hair that's styled away from his face, dark blue eyes and a long nose speaks. He's in a three-piece suit and an umbrella in his right hand. A woman with the looks that would give a model a run for their money is busy tapping away on the blackberry. Her black eyes stuck on the screen of the phone as her coffee-brown hair hides most of her facile features.

"Mycroft Holmes?" Mayleen smiles politely, walking swiftly over. Mayleen's heels clicking on the pavement as she stops in front of the six-foot man. Her 5'6" frame feeling incredible small next to him, even if she does have an extra two inches on her height. Mayleen doesn't have the long legs that Marilyn owns, her legs are shorter and she's thinner than her friend. Perky breasts. Long dark silky hair. Small waist and hips. Thin legs and flat stomach.

"So, Miss Moriarty does speak about me." Mycroft smiles, looking strained and uncomfortable on his face.

"All negative things might I add." Mayleen replies quickly, the red-headed politician making her incredible distressed. She now understands why Marilyn calls him The Iceman and why she warned not to let him twist your own words, "What can I do for you, Mr. Holmes?"

"Call me Mycroft, Miss Harper."

"My name is Mayleen." Mayleen answers back, shifting her weight onto her right side. The blonde and the Belstaff man stop on her left side, the tall one eyeing Mycroft with an icy stare.

"What are you doing here?" The tall man says, he's the same height as Mycroft though he looks taller next to the blonde man. Mayleen eyes him quickly. Curly raven black hair. Very light grey/blue eyes that also look green. Sharp cheekbones. Well defined cupid-bow lips that would make plastic surgeons jealous. The rest of the man's face is covered by the collar of his Belstaff.

"I am simple welcoming a guest, brother dear." Mycroft answers, his glare just as equally unwelcoming than his younger brother's. Mayleen raises an eyebrow, shivering slightly at the small breeze. Looking over, the body is being pulled out of the building and Lestrade is with two other police officers - a woman and a man.

"Mayleen, do you have a place to stay tonight?" Mycroft says, ignoring his brother. Mayleen looks up startled, mouth open as she tries to remember if Marilyn said anything about staying in London more than one night. Her phone pinged again:

Let Mycroft get us a flat. At least he'll be paying for the rent. -MM

Mayleen chuckles at the text before looking up at the impatient politician, "No, we haven't." Mycroft nods, before his assistant starts tapping away on her phone more violent.

"You'll be staying at 221B. The landlady - Mrs. Hudson - has two spare rooms upstairs next to Dr Watson's room." The red-head replies in a no argument tone. His brother huffs as Mayleen simply nods, "I have already got my people to move your belongings to the flat."

"Thank you." Mayleen answers quickly before his brother can speak.

"They cannot move into 221B, Mycroft! She's a relative of Moriarty! A spy among us, she could have planned this whole murder herself so she could move here without looking suspicious. You're playing right into the game, brother!" Mycroft's brother shouts, causing Lestrade to turn this way.

"You might want to know that Marilyn has five other full blood brothers that are currently living in London. You say that she might be a spy but what about her other siblings? She hasn't spoken to Moriarty face to face for a good eight years. I assure you that Marilyn wouldn't be as sly as to spy on you. She is blunt and can easily get the information - she needs - from you with a few words." Mayleen spits back at the young man.

Dr Watson grins as Mycroft sneers at his dumbstruck brother, "You see, Sherlock. Marilyn wouldn't do such a thing, maybe you should take Mayleen's advice and look up the other Moriarty brothers."

"I will catch her out." Sherlock sneers before giving both Mayleen and Mycroft a cold look before turning on his heels and calling for a cab. Dr Watson nods politely at Mycroft and grins at Mayleen before heading after his friend.

"Would you like to wait at the police station for Marilyn?" The politician asks, twisting his umbrella in his hand and looking past Mayleen towards Lestrade.

"I'd like to sightsee before I go to the station." Mayleen says, earning a nod off the Holmes brother.

"I will have a car pick you up in an hour in a half to take you to the station."

"Thank you…Again…" Mayleen blushes before turning around. Casting one last glance at the house, she makes her way down the busy streets of London. Avoiding the CCTV cameras like Marilyn taught her.

X-X-X

Author Note: I hope this chapter sparked your interest. I should also mention that Anderson will be more likeable in this series; I started to like him whilst watching Season Three and I hope – that with the influence of Marilyn – that he will be 'friendlier' to Sherlock. Anderson and Marilyn grow a close friendship/bond through this story but it won't change other characters and he, I think, won't be in it a lot. Any questions; ask away.

I have already written about ten chapters for this story but posting will be slow because of my studies, essays and school in general. I'm going to apologize now for the slow updates but I hope you stick with me. Please review and tell me your thoughts! They make me write faster and check out the link on my profile to see pictures of the characters.