Hecate closed her own eyes when he speculated what the demon would have done, closed them firmly to remind herself to keep her rage out of this hospital room. Yes, she could imagine very clearly what the imposter had been doing in Hermes' absence, and how both woman and goddess might respond to it once they knew.
But rage could come later, when she could best put it to use.
"Who else do you trust to keep them safe, and with the knowledge of what happened to you?" she asked him. "I can spread the word, carefully. Create a network that will help protect them. Athena will have some ideas. And Artemis would jump at the chance to discover if demons have tender bits. Even—" she sighed begrudgingly "—Apollo is fond of Luna, and we all know he isn't quiet about his feelings toward the devil for what he did to Clio. You have strong allies on your side."
Enough to take on the devil? Probably not. Enough to protect Luna and Peitho if they turned out to be targets? Perhaps.