Well that isn't something Bro is expecting to hear, so it catches him off guard. His eyebrows raise and the general air of surprise can be felt. He always thought they were pretty close- he can't think of a way Arthur would actually overstep any boundaries, considering how he's helped before. It takes a lot of trust for Bro to open up to anyone, and a special kind of person for him to trust that much.

"Really?" he asks, a little concern in his voice. "What the hell gave you that impression?" Before Arthur can speak, he adds, "You didn't. I think with you, that's kind of fuckin' impossible."