Doug could tell the woman was ready to hit him, kill him even, in defense of the old man. And he could also see the old man was enjoying the exchange more than he was upset at the content of the words used.
The young man shifted in the chair, moving himself to a better position to duck and roll should 'Miss Black' decide to wail on him. He ignored her last statement in lieu of muttering under his breath, "Your command of any language is as shitty as your hair."
Then he switched to German - the files had said he was from Germany - speaking directly to Max and hoping the woman couldn't understand them, "[german]I came to see you. I need to know, are you Magneto?[/german]"