Sherlock didn't even cringe.
Focusing his eyes upon the floor, admiring Greg and Molly's surprisingly impressive footwork, Sherlock simply played.
He did happen to notice when the feet vanished, and others joined them.
He might vaguely recall voices, not belonging to Greg or Molly, becoming prominent in the room.
Still, onwards he played.
Sherlock played as though his very sanity depended upon it – and indeed, perhaps it just may have.
Later on, John, Mary, and Mrs. Hudson would comment that they had never heard such beautifully passionate sounds emitting forth from his violin.
Sherlock only recalled the music, and then, suddenly, the gentle hand of Greg, with a slight tremor, stilling the wrist that manipulated his bow.
"Sherlock," Greg said softly, "You can stop now. "Baby is here. Time to find out who was right about her being a girl."
Sherlock seemed to snap to attention. His breath caught as he looked up at the shining brown eyes of his Yarder friend.
"Shall I summon John and the others" he asked, numbly. Greg simply nodded to this.
"Wait? Did you say… GIRL?"
He looked first to Greg, who simply beamed with relief, then to Molly, exhausted but ecstatic.
"Yes, Sherlock," Molly confirmed in a tired voice. "She's a girl. Time for John to face the music," she said, with unexpected brightness.