[John's jaw tightens as she sees through him again in a way he only really tolerates from Sherlock. Even then, this isn't a topic he'd pry at. It's too emotionally fraught.]

What d'you want me to do, Molly? Have a breakdown? What's that going to help?

[It's more of a snap than he means it to be. He reels it back in a bit and grits his teeth.]

Sorry. I just don't see it'd do any good for him or anyone else Caroline's after.