She released Martin's sides when he came inside her, and once the pressure of the knife at her throat lessened, Joan reached up to gently grip his wrist and move the knife away from her throat entirely.

"That was different," she noted softly, looking up at him with a small smile of her own. She touched her throat where the knife had been and her fingers came away with the tips smeared red. "Good thing I have a scarf..." Sherlock would not be happy if he noticed the cut. It's not like she could claim she nicked herself shaving.