Sherlock: I need you for an undercover case. You have no problem acting as my wife?
Molly: Oh, how about...siblings?
Sherlock: No. Husband and wife.
Molly: I just don't want to make you uncomfortable.
Sherlock: Not uncomfortable.
Molly: What about close friends?
Sherlock: *annoyed* We already are close friends! Why are you so determined not to be my fake wife?
Molly: *confused* I'm just thinking of you.
Sherlock: *grits teeth* Well, stop thinking of me. We'll be husband and wife. Alright?
Molly: Alright, if it means that much to you.
Sherlock: *stung* If it's too much of a trial-
Molly: *smirks* If I didn't know any better, Sherlock Holmes, I'd say you wanted to be married to me.
Sherlock: *scoffs* Don't be ridiculous.
Sherlock: Sign these papers.