She sees him across the room, sees the way his heart seems to shatter when he is not the one asked to dance.
Because in all honesty Molly Hooper is always looking at Sherlock Holmes.
Her eyes automatically scan the room for him, always spot his mad curls within seconds.
She has learned his mannerisms, can read him like he read others. Except she sees his emotions and understands them in a way others could not.
She watches him leave, wishes she could go after. She wishes she could tell him that he still matters to John and Mary, that he still matters to her.
But how can she go after him when Tom is right there? How can she ever explain to him that she understands Sherlock, that she loves him?
So she stays quiet, just like she always does. She returns her attention to Tom, who smiles at her.
She smiles back, but it never reaches her eyes.