Endearing in the last episode of Sherlock (series 3 ep.2)

She was interesting in former episodes of Sherlock,
bat was truly wonderful in "the Sign of Three" episode.

I was just thinking how great addition she is to the great duo ,
came here to pay her a compliment,
and just read someones observation saying
she and Martin had similar expresions or gestures.

And, thought to myself " well, surely they know that couples
tend to have that, and had practised for Sherlock with that in mind"

Then I read they are a couple in real life,
so now I'm smiling.