Tragos' frown didn't leave his face as he followed that pathway through. He kills Hecate, Apollo avenges Hecate by trying to kill Marcie, Hecate adopts a bedside watch for Marcie because she feels responsible?
It was not how he expected anyone to behave, and was struggling to believe it. Hecate felt like a threat, and it would take more than a version of events from Athena's perspective to change his mind on this.
Athena seemed willing to tell him things, though. Things he might not be able to find out any other way. He tried to pull his thoughts away from Hecate, back to something more tactical. He needed to know, in order to keep Marcie safe, and chances were good Melpomene would want to know too. "What are the other conditions for the truce?"