"Daddy?" Sherlock turned around to see little 5-year-old Hamish hiding behind the table.
"What's wrong? Couldn't sleep?" He got on his knees as Hamish approached him.
Hamish nodded. "There're monsters in my room daddy. They won't let me sleep."
"Would you like me to scare them away?" The small boy nodded, smiling as Sherlock picked him up and carried him to his room. Standing in the doorway, Sherlock dramatically turned on the lights, saying loudly:
"Monsters, begone!"
Hamish wiggled out of Sherlocks arms and leaped onto his bed.
"Do you see them?" Hamish shook his head. "Check the closet!" He squeaked. "They like to hide in there!"
Arming himself with a Nerf gun, Sherlock threw the closet door open in such a dramatic fashion that Hamish was reduced to a fit of giggles.
"I don't see any monsters, James." Sherlock closed the closet door and tucked Hamish into bed, kissing him on the forehead before making his way to turn off the light.
"Wait! Daddy, will you stay here if they come back?"

John woke up to the sun in his face, his body sore from sleeping on the couch. He sat up and made his way to the kitchen, making his way through the 'evidence' which littered the floor and covered the walls.
He stopped. Shouldn't Sherlock be out here? He thought, taking another quick glance in the living room. He wouldn't be sleeping. He never sleeps on a case. Making his way to the back of the flat, he opened Hamish's door, and peeked inside. Sure enough, two dark curly heads stuck out from under the covers.
And Sherlock thought he was a bad parent. Smiling, John let them sleep a little while longer.