Sherlock Reader Insert Collection

Matching Costumes, Mycroft

"Sherlock my name is Greg." Greg corrected wiping his eyes.

"No it's not, I should know because I know everything, contrary to what my idiot brother thinks." She was trying hard not to break character. The subject of their banter walked in from the kitchen.

"Why are you all laughing?" Sherlock glanced up to see his brother had arrived with (Y/n)...sort of. "Very clever." He said flatly.

"I know it's clever, I came up with it." She shot back.

"I do not sound like that!" Even his brother was smiling at the scene. "Oh, don't encourage her." (Y/n) couldn't hold in her laughter anymore and threw her hat at him with a giggle. Everyone just cackled harder at Sherlock's face.

"I'm sorry Sherly, it was just too good to pass up." (Y/n) joined Mycroft on the couch after the excitement died down. She finally got to look over her friends and their costumes. John and Mary were dressed in a cute Mad Hatter and Alice couples costume, Greg was dressed in a cheap pharaoh outfit, and Molly and Tom sported a Batman and Robin costume. "You all look rather dashing. Sherlock what did you dress like?"

"Same as Mycroft."

"What, arrogant, egotistical, know-it-alls?" Sherlock just huffed and turned from his brothers girlfriend. He couldn't believe that Mycroft could date, let alone date a woman like her. (Y/n) was audacious, in the best way, but her spirit really set her apart from the other women that threw themselves at his brother. She cared nothing about his government position or the check that came with it, she just liked Mycroft for him, god only knows why. "Though I guess that applies to my costume as well, though I would hope I look much cuter than Sherlock does."

"I don't know of anyone who would refer to him as cute, my dear." It was odd to hear such words of endearment from Mycroft, odd to everyone in the room save for (Y/n) who blushed.

"I have to agree with you there." John smiled at the older Holmes.

The party went on with plenty of laughter and fun. Occasionally the conversation lulled and was replaced with eating. Eventually Greg and Molly left, leaving only the Watson's, the Holmes, and (Y/n). Sherlock noticed the way his brother looked at (Y/n) and couldn't help but give the faintest smile when he saw their hands intertwined. He was glad that Mycroft could find someone to soften his heart, even in the slightest.

"I've gotta step out for a smoke, My when I get back we should really get going." (Y/n) kissed his forehead and went outside.

"Do I need to take her cigarettes too?" John joked.

"She needs them after all she goes through to keep me clean."

"Mycroft, are you going to keep (Y/n) around? She's really doing you good." Mary resettled on the couch with a cup of tea.

"I don't know what you mean. I am the same person I was before meeting her." Everyone scoffed and rolled their eyes at his blatant attempt to lie about his feelings.

"Come now, everyone knows you are infatuated with her." Sherlock smirked.

"How I feel about her is of no concern to any of you. She knows I lo-she knows my feelings for her." (Y/n) stood in the hallway and smiled at his stammered admission of love.

"Alright My, time to get home. You have an early day tomorrow." She interrupted before anyone could make Mycroft feel anymore embarrassed. She pulled him up off the couch and into her arms.

"Ugh." Sherlock voiced his disgust at their embrace.

"Goodbye to you too." (Y/n) ruffled his curls. "We'll have to top this year's costume next year." She kissed his cheek and went to hug Mary and John.

"I'll see you next week for lunch." Mary reminded her and pulled her in tight.

"(Y/n) we need to be going now." Mycroft slid on his coat and held open hers for her to put on. Goodbyes finished, they walked out into the autumn air. Kids were excitedly running around, candy bags swinging wildly and parents tiredly trying to keep up. (Y/n) smiled at the sight, pulling Mycroft closer and resting her head on his shoulder.

"Let's walk home, darling."

"Alright, dear." He didn't argue, knowing how much she loved this time of year. He stuck his free hand in his pocket and ran his thumb over the small box that had resided there for the past three months. Lost in thought, he was surprised when she stopped and wrapped her arms around his neck.

"I know you don't want to kiss your little brother but I'm going to do it anyways." Without hesitation she met his lips. "You don't have to tell anyone how you feel. I know and that's all that's important. As long as you know how I feel." Mycroft smiled down at the woman in his arms.

"Happy Halloween, love."

"Is that my treat?" (Y/n) winked at him.

"I suppose so, but when do I get mine?" She laughed and pulled away, skipping down the sidewalk. Mycroft watched after her, confused.

"Are you coming to get your treat or not?" (Y/n) called over her shoulder. He blinked. "I won't wait all night, My." She said lowly.

"Of course." He raced after her. "As long as you change first."