The Woman I Used to Know: The Morstan Sisters
Summary: What if Sherlock discovers that you, his fiancé, turn out to be an assassin? What if you have a sister who turns out to be Mary Morstan Watson?
Pairing: Sherlock x Reader
Title: ‘The Woman I Used to Know: The Morstan Sisters’
Content: Angst / Thriller
Warning: If you haven’t seen the second and third season of Sherlock, please do NOT read this one-shot. (Unless spoilers don’t bother you.)
A/N: You asked for a second part, well here it is! Third part in process. Enjoy :)
The Woman I Used to Know: The Morstan Sisters
The Woman I Used to Know: Magnussen
The Woman I Used to Know: You’re Safe Now
The Woman I Used to Know: The Truth
“I’m taking the case,” he just said without looking neither to you nor John. He stood up on his feet and walked away.
“Sherlock…” John said as you both watched him march over to the doorway. “Where are you going?” He asked but his friend ignored him. “Great, I think someone will have to put off the wedding,” he shook his head, stood up and headed to the kitchen to make some tea leaving you there alone.
You lowered your gaze down and looked at your hands. They were cold. You glanced at your engagement ring and then started playing with it. You turned your gaze up and took it off. It was the most beautiful thing that could represent the love between you and the detective. You smiled but then closed your eyes, pressed your lips and heaved a sigh. “I’m sorry,” you sadly whispered, took the ring and put it into one of Sherlock’s drawers.
You sighed, rose from the chair, took your things and without bothering John you walked out the flat to go back home.
In the moment the tea was ready; John took two cups and filled them with the hot drink. “I made…uhm…” he paused as he put the kettle down on the marble counter. “…some tea. I thought it could cheer you up. You know Sherlock can be-“ trailed off when he saw that you were not there. “Y/N?” He asked and put both cups on the dining table then started looking around. “YN?” He called again walking towards Sherlock’s room. He thought you may be there. He opened the door and he found nothing, you were not there. “Oh, Jeez,” he whispered to himself and face palmed.
Suddenly he heard someone slamming the main door. As he turned around to march over there he could hear a familiar voice. “John?” she called and sighed. “Oh, these men,” she said and heaved a sigh. “If they’d know the truth…”
John frowned and entered the living room. “What truth?” He asked and Mary jumped afraid. John fixed his gaze on Mary, though he blinked a several times. Mary looked away for a several seconds and stammered. “Er…you know the truth. The…uhm…the truth about Rosie’s first words,” she forced a smile.
“Don’t change the subject, please, Mary. This is not funny. Not now.”
“Not now, what?” Sherlock entered the flat and looked at them both having a domestic. “John, get me some morphine, please. I think I’m going to have a heart attack,” he said with a quiet and breathing heavily.
“You don’t need any morphine now, Sherlock,” he turned to him and refused to give him any drug to ease the pain. Then he looked back to his wife. “What truth? What are you hiding now, Mary? Does it have anything to do with your past?” He asked and she sadly nodded as she lowered her mobile phone. Sherlock locked his eyes on her. John sniffed and half turned to Sherlock. The detective lowered his head and looked away as he sighed.
Having a wife who was still lying to him and discovering that his best friend turned out to be and assassin was far too much to process in a day for John. Devastated, he sat on his chair and Sherlock joined him. “Will you sit down?”
“Do I have to?” She asked ashamed.
“Well, you’ve done this before; you know the answer,” John angrily muttered and cleared his mouth. Mary accepting the consequences picked a dining chair and sat down. She adjusted her coat around her, dusted off the tops of her legs, and looked at Sherlock as she swallowed.
“I’m sorry about what happened this afternoon,” she directly and sadly said to Sherlock. John’s eyes got wide-open and Sherlock’s face suddenly changed. “I know what she told you and she didn’t even tell me,” he frowned and then looked away. “People like us-“
“People like you should never exist,” John snapped.
“People like us should exist, otherwise you would be dead,” she confronted him. Sherlock fixed his eyes to the floor. Mary stretched a hand and put it onto Sherlock’s. “I know it’s not easy to understand, dear. But there’s no other choice but to accept it,” she said trying to find the detective’s eyes.
She looked at her husband yet her hand was still on Sherlock’s. “This is not funny, John. I know I hurt you and I know that I exposed you, but this…this is family. So, for once in your life, Doctor John Hamish Watson, don’t be selfish.”
“Mary,” he said in a loud but exhausted voice as he took her hand off. “Why are you here? What do you need?”
“Y/N-“ she was interrupted when John got thunderstruck.
“Y/N?” John asked as he glanced at Sherlock and then back to his wife. “What happened to her? She was here a minute ago. I made some tea for the two of us but when I turned around she-“
“She’s my sister,” she spat out.
John face palmed as he cursed under his breath and Sherlock looked at her in disbelief. Mary froze ashamed; she didn’t know what to say. The sociopath didn’t say a word and rose from his armchair just to sit down on a dining chair by the table and open his laptop. “Give me her name. Correction, give me all the names she had ever used.”
Mary looked at him and sighed. “She had never changed it,” she said but Sherlock raised an eyebrow. “She’s a Morstan too. She just changed her surname.”
John’s face was anguished. “Mary, don’t lie. You know, he’s cleverer than she,” he pointed at Sherlock.
“Not this time, John,” Sherlock whispered as he googled your entire name. “Nothing,” he said as he sighed. Suddenly, Mary handed out to him another memory stick. “What’s that?”
“Her own memory stick,” she said and he took it. Sherlock inserted it into the computer and quickly clicked on the main folder. He opened it. There were a thousands of folders containing data about you. “Please. If you’re gonna read it, don’t do it here; not with us in front of you,” Sherlock in shock closed the laptop, extracted the memory stick and returned it to Mary. She frowned. “Really? You’re not going to read it?” He swallowed. He could not believe what he had just seen. Codes, the contracts you’ve signed just to have a weapon with you, the list of the people who were tracking you, etc. “Sherlock, this is all she has ever done,” she affirmed.
“Was she part of A.G.RA.?” He turned to Mary and asked her, but she shook her head. “Did she work with you and Ajay?”
“She was on her own. Somehow she got Moriarty’s information, don’t ask me how. I’ve have absolutely no idea;” she paused and heaved a sigh. “Listen, she loves you,” she nodded trying to make him understand. “She really loves you, Sherlock; otherwise she would run away from you. And trust me, she would.”
“Mary,” paused and grimaced. John looked at him worried “Moriarty’s web is done. I’ve destroyed it, there’s nothing to do with it. Who would like to hurt her?”
Mary took a deep breath and then turned her gaze to the detective. “Magnussen,”
“Sorry, who?” John inquired confused. “How’s that possible?”
“He worked for Moriarty for some time,” she said. “People like Charles Augustus Magnussen should be killed, John. That’s why there is people like us,” she snapped. “Somehow, he wants the information that Y/N has for some reason. This is blackmail, Sherlock and you know it. He has documents that could make us go right to jail for the rest of our lives.”
“And why doesn’t Y/N give him the damn information?” John asked raising his voice.
“Because it must be quite relevant and it could spoil his plans.”
“Good. You’re good,” she smiled to Sherlock.
“She just wanted to save the whole nation, and possibly the whole world. Who knows what could Moriarty do with that?” Sherlock said, put both hands together and touched his chin with his fingers. “Mary,” he grimaced again and his voice by then was tight as if with physical pain. “What do you think…we should…do now? And please, be quick because I think I’m going to have a heart attack,” he said as he breathed heavily and then groaned in pain.
Mary and John exchanged gazes terrified and quickly jumped to help Sherlock. “Apparently we should take you to the hospital,” John hurried forward took and hold of an upper arm to support him while Mary called an ambulance. “Yes, hello. We need an ambulance at 221b, Baker Street now. Please. He’d been shot last year and he’s about to have a heart attack. Hurry. Thank you.”
Sherlock took a couple of noisy, strained breaths by then. “Mary,” she looked at him worried, without knowing what to do. “In that…” he whispered in pain. “…in that drawer is a bit of morphine. Take it…out!” he cried out in pain.
Mary opened the drawer in order to get the morphine to ease Sherlock’s pain but the first thing she found was a shiny ring. She gasped as she recognized it. It was yours. It was not a luxurious one but it was beautiful enough to represent the love between the consulting detective and you. Doubtlessly, she quickly took it and shoved it into her jean pocket. Once she put it in a safe place, she looked for some morphine for him. Finally, she found some and then handed out it to John.
“Thank you,” Sherlock thanked while lying on the floor. John sighed knowing that this was against his own principles.
“Oh, for goodness’ sake! He’s dying, John!” Mary snapped, but John glared at her then trying to remind her that it was her fault.
“John?” Sherlock called him. “The morphine” he begged with a heavy breath as he showed him his arm. John injected him the morphine in his arm and then closed his eyes tightly. “I’m going to be fine, I promise.”
“Sherlock, come on, you’re not-“
“John – Magnussen is all that matters now. You can trust Mary and Y/N,” he asked him.
He hesitated. “You don’t trust her,” he muttered.
“Er…” Sherlock pulled a face, half-nodding his agreement. “But she loves me – in a way,” he gave him a small smirk. Then he cried out in pain. John and Mary hurried and each of them took and hold of an upper arm to support him when the paramedics ran towards him. One of the paramedics got out an oxygen mask. While they continued working, John looked across to Mary with a worried face.
Quickly they got Sherlock out of the flat to take him urgently to the hospital. The ambulance roared and the sirens started to make some noise. Mrs. Hudson was by then out of the flat looking how they were getting Sherlock into the ambulance. John put his hand on her shoulder trying to reassure her. Meanwhile, Mary, who was two steps behind his husband took the ring out of the pocket and looked. “What have you done, Y/N?” She whispered to herself as a tear fell down on her cheek.
John turned around and instantly she dried the tear. “You alright?”
“Yeah,” she forced a smile, but when he turned around that smile disappeared.
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