Sherlock: *bursts into the lab in, agitated* Molly, are you aware that our friends believe us to be in a romantic relationship?

Molly: *calmly adds a drop to the vial in her hand* Yes.

Sherlock: *freezes in confusion* Why did you not correct them?

Molly: *furrows her brow in concentration* Because we are in a relationship.

Sherlock: *checks his Mind Palace* … we are?

Molly: *purses her lips and makes a note of her findings* Mmhmm.

Sherlock: Since when?

Molly: *puts down her work and finally looks at him* Since you took me out for fish and chips after arresting the Fake Moriarty.

Sherlock: *brings up the memory file* …oh.

Molly: *smirks* Yep.

Sherlock: *indignant* Were you ever going to tell me?

Molly: I thought I'd see how long it took for you to realize.

Sherlock: *calculates the timeframe* So, that would be-

Molly: Three months and 18 days.

Sherlock: Ah. And our experiments and take-away nights at Baker Street have been-

Molly: Dates? Yes.

Sherlock: How long were you planning on keeping it from me?

Molly: *grins cheekily* Long enough to be able lord it over you for a good long while once you did realize we were dating.

Sherlock: *pouts*

Molly: *approaches him and wraps her arms around his neck* Would a kiss from your girlfriend help soothe your injured ego?

Sherlock: *rolls his eyes* There's no proof that a physical display will-mmpff!

Molly: *tugs his head down and cuts him off with a passionate kiss*

Sherlock: *breaking away, panting* Will definitely need more data, but the results are looking promising.