Shortly after arriving back at the flat, Mrs. Hudson dropped by to see how her boys were doing. She was quite taken aback when the door was opened by Sherlock, holding a baby, of all things! "Sherlock! What are you doing with that child? You didn't take him did you? Oh!" Little Hamish gurgled happily while grasping up for Sherlock's nose. "Well, he sure is a cute thing," she smiled.
"Not to worry, Mrs. Hudson. We came across him while on a case. He is completely parentless," Sherlock said with a smile, which was somewhat inappropriate considering the circumstance. Although, chances are slim he realized that.
John walked up behind Sherlock, "I fixed that bottle for Hamish," he said, handing the warm milk over to the tall, lanky man beside him. "You might want to sit down and feed him." Sherlock cooperatively did so, leaving John to further explain things to Mrs. Hudson, who looked strikingly worried at the moment. John had to smile, imagining all the worst case scenarios going through her mind at the thought of Sherlock caring for a child. He certainly had the same thoughts earlier that very day.

"It was Sherlock who decided on the name?" Mrs. Hudson asked, something hard to identify in her voice. Suspicion? Perhaps.
"Yes, well, I had suggested, quite some time ago.." John rambled, careful not to directly mention Irene.
"Hamish was the second name that came to mind." Sherlock explained.
"And what was the first?" Mrs. Hudson smiled, that same suspicion dripping off of her words.
"Irrelevant. His name is Hamish." Sherlock dodged her question, which was certainly characteristic of him, but something about his demeanor seemed a bit off. John noticed he did seem just slightly flustered, which of course was very uncharacteristic of Sherlock.
"How long will you have him?" Mrs. Hudson was now holding a sleeping Hamish in her arms, rocking him gently. He fell asleep quite soon after eating. Having a full belly tends to have that effect.
Sherlock began to answer but John quickly interrupted, "We've asked Lestrade to look for any relatives we should consult, but so far we know of none. If all goes well until then, we may end up keeping him. I'm not too sure about all of this, but Sherlock has been adamant, per the norm."
Mrs. Hudson smiled affectionately at her two - make that three - boys. She'd always thought there was a bit more to Sherlock than he would admit. It was nice to see him showing some signs of being human. She practically chuckled at the thought.
"Would you mind making a cuppa?" John asked. "Perhaps some biscuits?"
"Not your housekeeper," she replied, but she handed Hamish off to John and got up to make one anyway. "It's awful messy in here, no place to raise a baby!" She shouted from the kitchen.
John looked down at Hamish, stroking his little palm with his own finger tip and smiling when Hamish gripped it. "It's just a reflex, it doesn't mean he's fond of you," Sherlock stated dryly. He seemed a bit like a jealous child letting another person hold his favorite toy, anxiously awaiting its return.
"Surely he'll grow to like me more than you. I don't leave body parts in the fridge, for one thing." John teased lightly, but looked up to realize Sherlock did look a bit bothered by the comment, if only for a split second. He quickly shook it off and scooted closer to John, legs now pressed together. Although John knew Sherlock had only wanted to get closer to Hamish, as he was now examining him closely and testing that "reflex" he had just mentioned to John, the warmth of the other man's thigh next to his did send a little shiver down his spine. The sensation was quickly pushed out of mind, as Sherlock seemed to have gotten a bit too close to Hamish, who woke with a start and began crying. Panic flickered in Sherlock's eyes, who quickly and carefully took him out of John's arms.
"Oh dear, is everything alright in there?" Mrs. Hudson called out.
"Just fine!" John replied. Quieter, he asked, "Do you even know what to do when a baby cries?" It seemed obvious that Sherlock didn't, as his countenance looked completely bewildered.
"Of course I do, John! I am a genius.." He looked lost in thought for a second. "Obviously one of his needs are not met. He just ate so it can't be that. He was also just sleeping.. What else is there..?" Sherlock's face lit up with an idea, so that you could practically see a light bulb appear above his head. He cautiously sniffed the air near Hamish, before frowning slightly. Apparently his conclusion was not correct. "What else could it be?" he wondered aloud.
"You just scared him a bit, is all." John smiled and shook his head. Of course Sherlock would forget about things like emotional needs. Raising a child with this man really was going to be a bit difficult. "Try bouncing him, just slightly, gentle! There you go."
Hamish had quieted down and Sherlock looked quite pleased with himself. He was absolutely full of surprises today. John never thought he'd see as much emotion from this man in his entire life as he had in this one day. "You're not fooling anyone, you know."
Sherlock tore his eyes from the baby to meet John's, "I am unaware what you are currently trying to imply." His eyes betrayed him with a slight look of panic.
"You really like Hamish, in fact you care for him."
"I care for nothing." Sherlock looked a bit less panicked, as if this wasn't what he was expecting.
Instead of starting a fight he knew could not be won, John just sighed and went into the kitchen to help Mrs. Hudson.