He didn't argue with the 'protection', he didn't know if he could open his mouth and not say something that would only incriminate him more; not that he hadn't already... Arms crossed tightly, Montague was ready to leave, he didn't care to keep listening. Why did it matter what Cass wanted to do, he couldn't trust that he would- not to mention he knew what they were up against better then any Auror would...
When Cass responded there was one last thing, he was honestly surprised; he'd fully expected a 'no' and then he could escape, leave and return to his family, warn them perhaps. Still, nothing could be worse then Cass' betrayal. At least he thought so; the next words out of Vaisey's mouth- he was a fucking ponce. He'd shared a shower! He'd- Montague felt like he was going to be sick...
He was a traitor and a freak. That was all there was too it. He wasn't going to stay in the same room with either, "you are sick," he began to angle his shoulders as if to leave before giving Vaisey a straight look. "And stay away from my son."