In theory, Cesar couldn't attack the Symons family because that would be a violation that would get him into trouble with the kingdom. But if the Symons family moved against him first, everything would change.
But Marcus found it absurd that a Viscount's family would have to go out of its way to punish an enemy who wasn't even noble or had powerful backers.
"We will not attack him. I want to talk to the bastard and demand an explanation for what he did to me." Marcus said, smiling confidently. "I want to test the son of a bitch and maybe find one of his weaknesses! And he can't attack us either, or we'd have a justification to take action against him!"
Theoretically, the Symons family couldn't use what happened outside Millfall a few days ago to act within the law against Cesar.