As soon as Salazar heard her voice, he turned, looking like he had been caught doing something very, very naughty. He hadn't expected anyone to walk into the room, and he was embarrassed, to say the least. Well, if he didn't want anyone to walk in on him, he should have locked the door, shouldn't he?
"I am becoming very involved in this game I am playing," Salazar told her, going back to English. "And I am becoming a little heated." 'Royally agitated' would have been a better term for it, but he was unwilling to admit that he couldn't do something.