John, who had gotten up early to get ready for work, couldn't help but feel nervous. He'd never left Rosie alone, at least not with people he didn't know very well, which nagged at him. Even though he knew that they had made the best choice by hiring Susanna he was still worried.

"John, shouldn't you get Rosie up and ready?" Sherlock bluntly remarked, walking into the living room and opening his laptop. He would be spending the day at Scotland Yard catching up on cases, which had him almost jumping with excitement.

"Sherlock, what if something goes wrong today?" John wavered.

"I will be reasonably closeby should anything go wrong, John, but I do believe that Susanna will do fine," Sherlock reassured, "She is an experienced nanny, after all."

"Yes, she is..." John sighed and meandered back upstairs to his bedroom to get Rosie up. Meanwhile Sherlock continued to scroll through his growing bulletin of cases and Missus Hudson came up with some tea.

"Good Morning, Sherlock! Is John up getting Rosie ready?" She asked, setting a cup down beside him before maneuvering into the kitchen, "Oh! Sherlock, are you ever going to clean up this kitchen?!" He looked over in time to see Missus Hudson staring at the severed head and fingers which were sitting in the fridge.

"Missus Hudson, they're for-!"

"Experiments? Yes, I know, Sherlock," She slammed the refrigerator door shut and tutted at the organized chaos Sherlock called the kitchen, "What a mess!"

Buzz!!

"That'll probably be Susanna." Missus Hudson remarked and went to let her in. Sherlock glanced at the time and tsked. It was 4:50 AM. She was early, true to her word.

He made no effort to acknowledge Susanna's arrival until she had accepted a cuppa from Missus Hudson, "Good Morning, Susanna."

"Good Morning, Sherlock," She greeted politely. A few more minutes passed, during which Missus Hudson and Susanna made small talk.

When he spared a passing glance in their direction, he deduced that she was an early bird who practiced the principle of early to bed, early to rise. She had been up for at least an hour already, by the dampness of her hair which was done in an inverted ponytail. She'd also taken her motorbike that morning, given the high collared biker jacket she wore.

"You have a pet, Susanna?" He asked.

She finished her tea and stood at the sink to wash it, "Yes. Let me guess, you saw the fur on my clothes?" He lifted his head from the screen to give her a deductive stare. She hadn't responded sarcastically like others normally did. 

"Yes. Dog or cat?" She dried the teacup and turned around.

"I have one senior cat."

"Oh really? You didn't say that you'd had one before." Missus Hudson chuckled.

"It didn't really come up."

"I would have thought you'd have a dog, actually." Missus Hudson mused. At this, Susanna laughed.

"Maybe one day, but right now I don't need the energy of a dog in the flat. Cats are so much more interesting anyways." This piqued Sherlock's interest.

"How?" He probed. She began to answer but John came down the stairs with Rosie and her attention shifted wholly to the little girl. Sherlock pursed his lips, upset that she hadn't replied.

"Hello, John."

"Hello, Susanna." She leaned towards Rosie a little bit and smiled.

"Good Morning, Rosie." Rosie cooed in response, groggy still.

"You're here early."

"Early is on time, at least in my book." Susanna explained. John checked his watch and sighed. Time to go.

"Well then, I'd better be off. Be good for Susanna, Rosie." John kissed Rosie and gave her one last hug before handing her to Susanna, "Page me if anything happens?"

"Of course," Susanna reassured the army doctor who nodded briskly, as if still debating whether or not to go, "I promise, we'll be fine." Her voice was steady and honest, soothing John's nerves smith for him to bid farewell and hurry out the door. Rosie quickly began to whimper. Missus Hudson and Sherlock exchanged glances whilst Susanna walked over to the sofa, rocking Rosie gently and comforting her. She sat down and pulled her rucksack close to her ankles.

"Why is she whimpering?" Sherlock asked.

"Many young children react by crying when their parents leave. It's a coping mechanism, if you will. I'm a new face, so she's adjusting to me as well. In addition she hasn't fully awoken, so she's upset," Susanna pulled out a circular rubber ring toy with textured sections and a rattle from her bag and shook it, "Look, Rosie!" It took a minute for Rosie to focus on the toy, and then the whimpers started subsiding.

Sherlock sat and observed the two interact until he got a text from Lestrade about a double homicide. He leapt from his chair and grabbed his coat, "I'm off! Double homicide outside Westminster."

He patted Rosie's head and darted out the door, leaving Susanna and Rosie alone to their first day of bonding.