If he didn't know any better, there was something else behind the way Mab said what she did, but the ghoul didn't quite pay attention to it. It was more background noise as he focused on his Master. He shouldn't have hugged him, but it wasn't just that that was making him make that face. More that he didn't quite understand, he guessed. That was alright, it was fine. He didn't need to know everything there was to know about the two vampires he served. Maybe it just wasn't his place to know.
The way Rook said he was just a beast struck an odd cord him him, instincts telling him it wasn't a nice thing. The rest? He didn't think that someone that had caught the older man's attention would just disappear like that, no matter the clan. Or, that's what he was going to tell himself. He already believed it. "It can't be bad, then." It was quiet, something that was shocking for him, he knew.
Was he making a dumbass out of himself? Probably. Yes. He did that sometimes.