Sum: A girl from John's past shows up at 221B Baker Street and ends up moving into 221A. Will her presence drive John and Sherlock apart or closer together and where is her sister, the girl John fell in love with as a teenager?

Author's Note:

I don't own Sherlock BBC does. Anything recognizable is not mine

It was a normal day I had caught a murderer this morning and now I lounged in my chair watching John write his blog. John jumped when the doorbell rang. Mrs. Hudson answered the door and came up the stairs a few seconds later followed by a second set of footsteps which favored the left leg.

"There is a young woman here asking for you John" She called as she poked her head around the corner. She disappeared down the stairs. John and I shared a confused look because people normally came to the flat searching for me not John. He stood up and sauntered over to the door. He opened it. A smile spread across his face and he opened his arms. He knew her then. A girl shorter then John bolted into his arms. She was crying. Her leg was in a boot. The way she stood even though she was crying told me it gave her a great deal of pain. The boot was dinged up but clean meaning she took care of it mostly likely she served in the army and was a bit of a klutz. Maybe am army doctor like John. I deduced this in under ten seconds.

"Emma what is wrong?"

"My father he is dead" John's eyes turned sad. He started rubbing circles on her back. He locked eyes with me and mouthed the word tea. I rolled my eyes but obeyed John had his arms full. I made three cups of tea; I had no idea how to fix the girls so I fixed it like Johns with a touch of milk. When I returned from the kitchen John had managed to detach the girl from him and got her to sit in his chair. She smiled a grateful smile when I handed her a cup of tea. She sipped it and sighed. She looked up at me and it was at that moment I noticed her eyes. Though puffy from crying they were the most piercing green I had ever seen. "Thank you" She whispered and John crouched down by her feet. He placed a hand on her knee.

"Tell me what happened, Emmalyn?" John softly spoke as if trying to not spook her. She stopped looking at me and stared at her teacup.

"He died in a car crash early this morning on his way to work." She muttered and then yawned as more tears fell down her face.

"Finished your tea I will be back in a second." John stood up and motioned for me to follow. I joined him in the kitchen. He leaned against the wall keeping an eye on the girl. "I am going to sleep on the couch tonight so please go to bed for once.

"We both know that is not going to happen."

"That means we are both not getting any sleep."

"Put her in my bed and you can sleep in your own."

"I am not sure she will be okay with that. She is a little odd I think she would rather sleep on the floor then steal another's bed." John sighed and returned to the girl. He whispered something to her and she nodded.

"Do you still have it?" I heard her ask. John smiled and disappeared into his upstairs bedroom. He returned with a duffle bag I knew he kept in his closet though I never understood why until now. It must have some of the girl's clothes it. The girl, Emmalyn took it and John directed her to the bathroom. She returned wearing a t-shirt and shorts. She hopped on one foot. Not putting any weight on her other foot at all. John took her bag and boot from her and set them in his chair. He scooped her up bridal style and disappeared into my room. He returned five minutes later alone.

"Why do you have a bag of her clothes?"

"Emma and I are childhood friends and neighbors. When we moved out we each packed a duffle bag and traded bags. Every year we repacked the bags but they haven't been repacked since I started in the army. Goodnight, Sherlock" He disappeared up the stairs. I returned to my experiments but quietly since I did not want to deal with an angry John and a crying Emmalyn. She would probably start crying again the moment she was woken.

Emma POV:

I woke up the next morning and couldn't remember where I was. Then I remembered John's flat 221b Baker Street, in his flat mate's bed. Sherlock's bed smelled delicious like old books and tea. I sat up and swung my legs over the edge of the bed. I squeaked in disappointment. John did not bring my boot in here. I cannot walk on my foot without my boot.

"John," I softly called. "John," I heard footsteps and stopped calling. The door opened but instead of John it was Sherlock and…. he was not wearing a shirt…

"Can't walk without your boot." It was more of a statement then a question. He left and returned with boot. He handed it to me and disappeared. I snapped it on and stumbled into the kitchen. Sherlock was brewing a kettle of tea and John was nowhere in sight. Sherlock handed me a cup of tea nodded at me and started tinkering with something at the kitchen table.

"You are a detective right." Sherlock looked at me

"You are an ex-army doctor, a bit of a klutz judging by all the dings on your boot and the scars all over your arms and legs and John is your comfort though you have a family of your own."

"That was impressive," I mused and sipped my tea. The elderly lady who had let me in the night before appeared at the door.

"How are you doing, darling?" She addressed me.

"Better thank you," I nodded.

"Is John awake yet?" Both Sherlock and I shook our heads though he never looked up from his tinkering. "He has a letter." She handed me an envelope and disappeared down the stairs. I dropped it in shock when I read the return address. Just then John appeared rubbing sleep from his eyes. He stopped behind me and rested his chin on the top of my head.

"You have a letter from Mary," I growled. He snatched it. I laughed as he hungrily tore it open and started to read it.

"Read it out loud, John," Sherlock sighed still not looking up from his work. John rolled his eyes.

"Dear John, It was nice to run into you in the store last month and I would like to see you again. I write you this letter to apologize for multiple reasons. The first being I gave your new address to my pesky little sister and I apologize in advance for when she shows up at your door because I know she will. She always does. You are her rock and always will be, John. I also want to apologize for how I treated you when we were kids. You were my sister's best friend so I resented you but I regret that now. Sorry, John. Love Mary" He read.

"Mary is Emma's sister" Sherlock observed.

"Sadly," I sighed. "John adores my sister," I teased and John blushed. He muttered something about tea and wandered to the fridge.

"Sherlock !" John yelled. "Why is there a hand in the fridge?!" I raised an eyebrow at Sherlock and he shrugged.

"Experiment," He called to John and I giggled. I heard John grumble behind me and that sent me into another fit of giggles. John appeared by my side with a cup of tea in his hand. I smacked his arm.

"What was that for?" He inquired.

"For leaving my boot out here, you know I cannot walk without it"

"How did you get out here then?" He asked. I pointed at Sherlock.

"He brought it to me," John laughed softly.

"You know you should be able to walk on it without the boot by now it has been a year."

"My doctor says in about a month I should be able to walk on it." I sighed and set my now empty tea cup down. "Well I better go find Mary. She is getting back this morning." Tears started running down my face.

"Do you want me to come with you?" John asked his eyes showed his worry for me and his excitement to see my sister again.

"If you do not mind." He smiled and disappeared up the stairs. I grabbed my go bag and went into the bathroom. I quickly changed and brushed my hair. John was trying to convince Sherlock to put on a shirt when I returned to the kitchen. Neither one of them noticed me so I observed them. John had cleaned up and changed out of his pajamas into jeans and a jumper. I started to observe Sherlock. Sherlock must have been running his fingers though his hair because it was stuck up at all angles. Though still shirtless he was wearing dress pants. John stood up when he spotted me. He smiled and proceeded to put of his shoes on. I ruffled Sherlock's hair as I passed and disappeared down the stairs, acting like I did not see the confused look the boys had shared. John followed me into the street. It was a twenty minutes' walk to my sister's house. In which John tried to talk to me but I knew him too well. I knew he was beating around the bush. I stopped walking and he stopped a few feet in front of me.

"John, what is on your mind?" He shrugged and I raised an eyebrow.

"Why did you ruffle Sherlock's hair?" He asked timidly.

"To confuse both of you, John. He had been running his own fingers through it all night in frustration. That is why it is sticking up. It is obvious that he has not slept in at least two days so therefore it is not bedhead. I figured it would confuse both of you if I played with his hair" John laughed and continued to walk. I jogged to catch up with him.

"Well it worked, Emma," He laughed. I hooked my arm through his like we used to do as kids. We chatted the rest of the way to Mary's house. I rang the doorbell and John waited at the bottom of the steps. Mary appeared at the door. Her normally professional demeanor was not there. Her honey-blond hair was tied up in a messy bun and she wore sweatpants and t-shirt. She smiled and stepped aside to let us in. Mary pulled me into a hug and John shut the door behind us. I could feel Mary's hot tears fall against my shoulder. I mouthed the word tea to John and pointed to down the hall. He nodded and smiled weakly. A few seconds after John left I guided my sister into the kitchen. I held her steady and deposited her on a bar stool. I plopped next to her and started rubbing circles on her back. She hiccuped as John handed her a cup of tea. He still remembers how to make it for her like he did as kids all that time ago, two sugars with a dash of milk. Mary smiled weakly in thanks and sipped the tea.

"I knew she would come to you" Mary addressed John. John smiled.

"I am her best friend and will always be" John answered and I giggled. Mary laughed softly and only half-hearted. Tears still threaten to spill from her eyes and I could feel my own tears' path down my face. I knew Mary was taking it worse than me. Our father had always wanted both of us to follow his footsteps in politics. When I made it clear I had no desired to get tangled in the drama that was politics, my father shifted all his attention on to Mary. When we lost mother fourteen years ago I took it harder than Mary while in this moment Mary was grieving the most. She had always been daddy's little girl. John understood this better than anyone but me. He had been there every step of the way. He had loved Mary through every heartbreak and every achievement. John had never stopped loving my sister. John loved Mary but he was my best friend.

"That she is," Mary sighed and smiled at me. Suddenly she got the look on her face that says she just figured something out. "Emma, aren't you losing your flat next week?" I nodded. A look of shock graced John's face. "You could move in with me I have an extra bedroom."

"Mary, I grew up with you I don't think I could put up with you now"

"Emma, if you do not want to move in with Mary there is a flat in the same building as me. It has no kitchen so you would have to share with Sherlock and I. That is if you can put up with hands in the fridge." I laughed softly.

"I put up with Mary for my entire life I think I can handle hands in the fridge." The other two burst out laughing. We spent the next few hours reminiscing.

"So what about it," John asked. "Moving into 221C."

"I will if you ask Mr. Sherlock Holmes what he thinks about it."

This is how I ended up standing in front of 221, on a Thursday in September with Mary. I had called Mrs. Hudson a few days previous to confirm the deal. She was elated to discover someone for the basement flat and a woman at that. I knocked on the door and John opened the door with a smile. He grabbed a few boxes from Mary's car and led us down the stairs to the basement flat. John and/or Mrs. Hudson must have cleaned up the flat since it smelled like flowers.

"So like I told you no kitchen but there is a small living area, a bathroom and a bedroom."

"It is perfect small and cozy." I hummed and John and Mary left to retrieve the rest of my stuff while I explored my surroundings. There was a painting of the Periodic Table on the wall in the bedroom. The note attached read.

Dear Emma,

I know you have this completely memorized but I found it the other day when Sherlock dragged me to some science store.

Love

John

I chuckled softly as John and Mary returned.

"They will be around with your furniture tomorrow morning," Mary sighed. I gave her a quick hug. She smiled, nodded at John and left.

"Looks like I am sleeping on the floor tonight" I sighed.

John chuckled, "Well I have to do the shopping. Do you need anything?"

"Does chocolate count as a need?" I asked.

"I think with your leg it counts. I will see what I can do. Feel free to explore the kitchen," John left and I started sorting through my boxes. I could not move the entire box from room to room by myself with my foot the way it was. I could on the other hand organize it by room.

Twenty minutes later, a voiced sounded from behind me. "No furniture yet, so nothing to put away yet," I whipped around to find Sherlock Holmes leaning against the door. He had a smirk on his face. I raised an eyebrow at him. "You must be bored."

"I heard you are always bored."

"What else has John told you about me?"

"He hasn't really told me anything other than you like to keep body parts in the fridge." Sherlock chuckled.

"That is a soft spot for him," He mused. He spun out of the door frame and I heard the door slam shut behind him. I climbed up the stairs and started looking at the kitchen. I opened the fridge and found a jar of toes on the second shelf. I chuckled. John found me drinking a cup of tea in the kitchen ten minutes later.

"Where did Sherlock go?" He asked as he handed me a couple of bars of chocolate.

"I don't know he left about ten minutes ago." John proceeded to put away the shopping. Sherlock stormed in ten minutes later. He tossed his coat on the rack and dramatically flopped on the couch.

"John, I need something to do, bored!" He exclaimed.

"You are right he is always bored," I laughed.

"Emma!" Sherlock shouted. "Come here." I set my now empty tea mug down on the counter and crossed my arms.

"Why?" Sherlock grabbed me by the arm and dragged me into the middle of the room. He walked circles around me while poking and prodding me.

"What are you doing?"

"Deducing you is it not obvious," Sherlock sighed.

"Alright fine I am giving you five minutes to do anything you want to me with in boundaries to figure out what you can about me," I sighed. "John start the clock." For five minutes, I stood there and took Sherlock's abuse.

"Done"

"Alright what have you got?" John asked. Sherlock sat down in his chair, crossed his legs and folded his hands.

"I have a theory on John."

I know cliff hanger but I have to keep you hanging around somehow. Thanks for reading! Please Review