Devon’s eyes widened in shock. “Oh,” he half-laughed like a cocky idiot. “So, you’re jealous of that guy?”
We know Devon never thought this could happen, so he likely is in shock. But Maddox always assumes the worst because of history, and thinks Devon is mocking him. There's definitely a lesson in there - don't antagonize people that you're into - they won't believe you (or trust you) when you finally want to be honest

