We have a curious third party into our favorite pair.
Spying
She ran a manicured nail over the edge of the picture, a habit she'd never gotten rid of (she ran her fingers over everything). Eyes like garnets locked in on the compact, blond man with the easygoing smile standing next to the grim, dark Sherlock Holmes.
"Fascinating," she said finally. "I've seen everything I wanted to see. Thank you." She looked up at her informant curiously and asked, "Now, allow me to ask how you got such a picture?"
He had the grace to look abashed.
Anita Holmes scolded, "Spying through security cameras again, Mycroft dear?"
"Only in moderation, Mummy."
Prompt was #34: garnet (which is a lovely color- kind of a burgundy-brownish shade)