It takes her seven seconds to notice they're not alone anymore. He doesn't say anything, but his presence is intimidating enough – or would be to ordinary people, she assumes.

She's far from ordinary though, and she's not afraid to meet his eyes.

"If he dies, I cannot guarantee your safety."

His voice is like ice and steel, but there is fire in his eyes. She holds his gaze for a moment, then nods briefly.

"Understood."

Silence falls over the hospital room, and she glances over at Sherlock. If he dies, then Mycroft Holmes will be the last of her problems.