I was pretty antsy about this plotline when it was new.
Seems that when a character starts hallucinating in fiction it always goes one of two ways. Either the things they're seeing/hearing are real, because they're our noble heroes and obviously they'd never hallucinate. Or they're false, which is always an early indicator that they're not just insane, but dangerously and violently insane.
Guess we're almost caught up so I'll get to see where it goes soon enough.