Thank you so much to hal-is-absolutely-not-ladylike who was my Beta and did such an amazing work and please enjoy, guys! :33 (put in the comments if you want a Elizabeth Series in this same universe)
It was a quiet Sunday evening after a busy week. Mycroft was reading the papers in his armchair while Greg was finishing the last pages of a file from a simple case. Elizabeth was sitting near Greg's feet, with some dolls and stuffed animals placed near her, forming some kind of circle in the floor. She was talking in a very serious tone with the white rabbit at her right (which made Mycroft and Greg share a shy smile) and holding a pink kettle of plastic in her left hand.
After she decided that they had more than enough "tea", Elizabeth made her way towards the DI's lap. He quickly picked her up. Not before, of course, closing his laptop since Greg really didn't want a repeat of the last time she had seen his screen (Elizabeth read aloud the details of a bullet in a man's head, causing Sherlock to grin ridiculously.)
"Papa, can I ask something?" She said, leaning in to her father's chest.
"Of course, love."
"Why does daddy have so many scars?" Elizabeth asked, looking up to Greg with big eyes.
He and Mycroft shared a look before Mycroft quickly invented an excuse to get out of the room and go to his office.
"I made daddy angry."
"No, No!O- Of course not. Come here."
Greg made his way to the couch with Elizabeth in his arms. He sat on the floor facing the couch, with her in front of him on the couch's seat.
The silence was so absolute it would not have been hard to hear a pin drop.
He made a serious and if frustrated expression before he started to speak.
"It's a secret /but/ since you are really smart my little girl," He told, poking softly at her nose. "it looks like I am gonna have to tell you."
Greg holds both of her hands and leaning into her, he whispered: "Ready?" Elizabeth nodded her head and swung her feet which were hanging in the air, not at all trying to hold in her excitement.
"Your daddy is a… hero!" He said with a smile playing in his lips.
"A… hero?" She inquired, not quite believing at her father's words.
"Yep, a real hero."
"But… the scars. You did not explained why daddy has them." Elizabeth said, pouting a little and crossing her chubby arms over her chest.
"Every little scar, the ones he has on his arms, on his belly, and on his thighs, they mark every battle that he won."
"Wow! Really?" With a big smile in her face as she asked.
Greg happily nodded with his head.
"Can I have scars too? Pleeeasee…"
"Hey, hey! Look at me. Promise to papa and daddy that you are /never/ gonna to try have those scars. If you ever feel like wanting them just talk to us. Promise? Just—Never…Please" He finished, brokenly… tightening his grip in one of her arms.
"O- Okay." Elizabeth agreed, a bit scared of her father's suddenly change.
Greg saw his daughter's tension and tried to compose himself by slowly drowning his fingers through her ginger curls and slowing his breath.
After some minutes he continued his line. Now more calm and relaxed.
"…and if you ever see anyone with scars like that, I want to you to tell them how amazing and beautiful they are."
"Pinky promise!"
"Pinky promise."
"Can we see daddy now?"
"Of course, sweetheart. Come on!" He said smiling, helping her up from the couch.
In the other side of the door, Mycroft stood listing in and not quite believing his husband's words. How could he deserve such an amazing life?
