She shifts carefully so she can lean back against the headboard, then gently rubs his shoulder before stroking his hair. She's here for him, whatever he needs, including physical and emotional comfort. As she tenderly strokes his hair, she thinks about Sherlock. About how kind Sherlock has been to Ted, including by not outing him to Joan, even though he must know that Joan would never think any less of Ted for it. It's unusual for Sherlock to be this close to someone this fast. Of course much of it has to do with Joan herself falling in love fast and hard, and even more with Ted and Sherlock both almost losing her, then taking care of her. Still, there's clearly a connection there, a friendship, that goes beyond merely having Joan in common. She wonders if there's attraction there, at least from Ted's side. She knows that Sherlock is straight. The detective has few, if any, sexual hangups, and that includes the possibility of being gay. But there can be intimacy in a friendship without sex, as Joan and Sherlock themselves have proven. Perhaps Sherlock need not have worried about losing his friend and partner. Maybe, rather, he's gained another.