Hello there.
I just started rewatching Sherlock and this plot bunny wouldn't leave me alone. So, here you go. Just a little taste.
"...Sherlock."
"Yes, John?"
"Is that… is that a baby sitting in my chair?"
Sherlock opened his eyes, and glanced at John from his position on the couch.
"Obviously."
John blinked, and looked at Sherlock, back at the- the baby- and shook his head slightly.
"Why?"
Sherlock let out a sharp breath that could have been a sigh, and swung his long legs to manuever himself to an upright position.
"It caught my attention."
John raised his eyebrow at this. "It. Do you even know the gender?"
"Female."
"...Name?"
Sherlock looked at him like he was crazy, which really should not be new to John, but really. A baby?
"I was just contemplating that, as a matter of fact. What is a suitable female name, do you think, John?"
John made his way to the baby, who was making happy baby noises and looking perfectly at ease snuggled into the Union Jack pillow. He smiled despite himself, and bent down to pick her up. The baby held out her arms, as if she knew what was coming.
"Just go with Samantha. Simple. Elegant, I suppose."
Sherlock hummed to himself, his fingers steepled together. "Samantha Holmes. I like it." Then he suddenly stood up and stalked over to John, sweeping the baby from his arms. Twirling around with the giggling baby held high, he said, with a rather boyish grin,
"We'll call her Sammy, eh?"