She can hear the tears in his voice, and she dearly wishes that she was there to hold him, to let him hold onto her, secure in the knowledge that he is safe and so very loved.

"That makes sense," she says, understanding the importance of the power dynamic. "He'll probably be handcuffed to the table. And Sherlock will probably be watching from another room." She's still worried about him, but she gets why he might want to do this.

"You'll want to talk to Sherlock. He can set it up. You can tell him I agree that it could be helpful, if you like."