Wait

You loiter by the desk, invisible to human eyes, until eventually Emma returns, a pile of books in her hands.

She dumps them down on the desk and then you sense it. She freezes, her mind numb with both confusion and fear. Slowly a shaking hand reaches out, picking up the picture and staring at it, her eyes wide her jaw dropping.

You silently chuckle to yourself, watching her reaction, and pondering your best next move.