Everything began when John came back from his grocery shopping (Something Sherlock will never do). He walked in the kitchen and saw his flat mate looking through his microscope, but John realized that Sherlock was not by himself, there was a girl sitting next to him who was doing the same thing. From the back she had curly long black hair, wearing a pink shirt, and jeans.

"John, are you done making that tea?" Sherlock greets him without looking up.

"When did you ask that?" John asked looking confused.

"About 30 minutes ago," Sherlock replied as he looks at his watch.

"I was grocery shopping for an hour," John informed him.

But Sherlock shook his head, "No, I'm pretty sure you were here."

John shook his head with disbelief this was not the first time Sherlock has done this. John could be at the other side of town and Sherlock will think he was talking to him at the flat at that time.

John sigh heavily, "Fine I'll make you some tea."

Sherlock gave him a quick smile and lock his eyes back to the microscope.

John then realized the girl was still there, so he turns around and asked, "Who are you?"

"She's my niece John, and try to show some respect," said Sherlock.

"Niece? You never told me you have a niece" John raised a brow.

Sherlock shrugs, "Why should I?"

Before John could open his mouth to argue, the girl got up from her seat and smiles at John.

"Hi, my name is Scarlett Holmes."

She was beautiful, extremely beautiful and skinny; she had greenish-blue eyes, her skin was pale, and was wearing a heart shape necklace. It was hard for John to believe that Mycroft to have a daughter, but when John looks at her again he did not see any resemblance between her and Mycroft, he thought he looked more like Sherlock which he found it strange.

"Aren't you supposed to be at school?"

Scarlett started to laugh, "I ran away thanks to my favorite uncle Sherlock,"

"I'm your only uncle," Sherlock reminded her.

"Why did you run away?" John asked.

Scarlett roll her eyes, "Because it's BORING!"

"So how did Sherlock help you escape from school?" John raised a brow.

"Uncle, you should tell him what you told the school," she looks at Sherlock with amusement.

Sherlock looks up and gave a small smile, "I told the school that our dear Aunt Mary was dying and she wanted the entire family be by her side before her passing."

"Oh, I'm so sorry."

Sherlock and Scarlett burst out laughing which made John look like an Idiot, "What's so funny?"

"Nothing it's just that Aunt Mary died 5 years ago," Scarlett explained to him.

"Bless that old woman, hated her anyway." Sherlock replied

"No one liked her, except dad" said Scarlett with a laugh

Sherlock's smile suddenly drops and he went back to his experiment.

"Does Mycroft know you're here?" John asked

"Of course not! I'm not supposed to be here anyway," she replied

"Why?"

Scarlett shrugs, "Sibling rivalry I guess."

She then joins her uncle and went back to her own work while John went to the kitchen to make some tea.

All the sudden Sherlock's phone went off; he took out the phone from his pocket to see who was calling him.

"If it's dad tell him you never heard from me!" Scarlett whispered.

Sherlock sigh, "Don't worry, it's just Lestrade."

After talking Lestrade, Sherlock got up from his seat, "John put the kettle away, there was a murder a block away from here!"

John did what he was told and went to the sitting room to put on his jacket.

"Can I come please?" Scarlett begged.

Before John could open his mouth to say 'no', Sherlock cut him off.

"You can come as long as you don't cause any trouble," Sherlock warned her.

Scarlett jumped with delight, "Thank you so much!"

Hope you guys enjoy reading this... Please I know my English is bad it's because it's not my native language so please bear with me. Thank you :)