What Mathew saw
"How do you…" Marcus attempted to reply, only to then turn his mouth shut as his face gave out a mix of emotions.
From terror, through surprise and shock all the way to fury mixing with killing intent.
Then, the man shook his head while hiding his emotions and replacing them with a helpless smile.
"Even if I asked, you wouldn't tell me how in all hells you know me, would you?" he asked with a small, obviously fake smile.
"Isn't it better to talk when we are no longer pretending to be stupid?" Mathew played along with a small smile on his own.