There is a tenant at 221a Baker Street. She shows up rarely and stays short. In the whole time John and Sherlock have been in 221b they have each met her only twice but seen her a few more times then that.
Once when getting home late from a case they watched her stumble into her apartment. That was the first time they laid eyes on her. The second time was during an intensive thunderstorm, they watched her slowly make her way inside, drenched.
They didn't talk to her until John accidentally bumped into her on his way out of the house.
"Oh! Sorry, sorry." He had exclaimed.
Her handful of papers had scattered, which she had immediately started to retrieve.
"Fine, it's fine." She muttered.
He bent down to help but she insisted she had it so he moved along. He found it curious that she didn't want any help but soon forgot the encounter entirely. It wasn't until a month later when Ms Hudson had spent the day scurrying around their flat in annoyance, that John remembered.
"MRS HUDSON! If you'd please keep your mumbling to a minimum that would be most helpful." Sherlock barked.
"Sorry, dear, sorry!" She responded.
John, being the more considerate of the two detectives, preceded to ask Mrs Hudson what seemed to be the matter.
"Oh, it seems Aria will be late tonight so I will have to open her flat up myself."
"Aria?" John inquired.
Sherlock made an exasperated noise, "yes John, obviously. Aria Vancooper is the woman who occupies, or more accurately sometimes occupies, 221a Baker Street."
John nodded a bit as he remembered his meeting of her about a month earlier.
"We should invite her over for dinner." He stated out of nowhere.
Sherlock didn't answer for a long time and Mrs Hudson kept quiet..at least until Sherlock did answer.
"Why?"
"I think that's a lovely idea!"
The two statements were exclaimed at the same time but both were heard clearly.
"Because Sherlock it's polite to get to know our neighbors." John said.
Sherlock thought about that answer with a quizzical look on his face before he went back to looking into his microscope.
"So? Sherlock?"
"Yes? Fine, fine." He replied not looking up.
Mrs Hutson sounded delighted by their decision and even said she'd be willing to clean their flat for them. Everything was in place, except for, of course, the guest. Whom would be arriving at her own flat late that night. John had decided to invite her for dinner the following day, so not to bother her when she got in. Sherlock, on the other hand, had decided to completely forget the engagement.
