"I have no idea what you are talking about."

"When was the last time you spent time with John since he came home from the hospital that wasn't sleeping or sexual?"

Silence.

"I thought so." Mycroft played with his umbrella. "I went and visited John today, to see how he was and I think that he is looking worse than when he had been in hospital." Sherlock's head snapped in Mycroft's direction. "He has a number of suspicions, many of them that are causing him considerable pain because he doesn't want to believe that they are true."

"I hope you aren't suggesting what I believe that you are suggesting."

"That John thinks that you are having an affair with Jim Moriarty? I am more than suggesting it. His worries are written quite plainly on his face at this point in time and you are so wrapped up in whatever it is you are seeing in Jim Moriarty that you're blind to the pain that you are causing your husband."

"I cause him no pain."

"You don't see the pain because at the moment you are blind to it. You cannot see beyond your nose or beyond whatever you and Moriarty have been doing; but you, Sherlock Homes, need to do something about a man who loves you and is badly breaking."