[ Mycroft was shocked. John couldn't be serious could he?]

Surely you can't be serious, John.

[ He frowned and stepped around his chair, moving closer to John.]

He's going to be very verbally abusive to you about me. Are you sure you want to go through that? You know how Sherlock can be. He's not going to stop until he gets what he wants.

[ Mycroft didn't give a damn if Sherlock knew and spent all of his time being cruel to him, but he didn't want to see John hurt by his brother any more then he already was.]