DM: Say sorry for being rude.

"Sorry, lad, I didn't mean to sound rude." AA shrugs, looking down at his computer. "It's fine, DM. I ought to get back to work. I'll be home late, so don't wait for me or anything." You leave his office and shut the door behind you, figuring you ought to give the kid some space to work. At least you know where Mr. M's office is now!