Once Sherlock gets to his feet, Ted immediately heads to the kitchen - finding pretty much nothing there of course. (At least there are no severed body parts or any weird experiments in there right now.)

So he quickly pops outside (glad it's dry out, since he did not actually bring his shoes) and into the other apartment, grabbing two bottles of water, a bag of crisps, and popping some Christmas leftovers into a bowl and reheating it. He makes sure to not grab too much - he doesn't want it to be overwhelming, and he doubts she'll want to eat too much right now.

He's back upstairs within minutes, quietly entering the bedroom. He's so glad to see Sherlock there, holding Joan's hand. They both seem to need a little nudge to take that step of comforting and accepting comfort, but when they get it, of course Sherlock is there for her.