In ACOFAS, chapter 16, Rhysand's point of view about Cassian getting a home in Velaris:
"Not that anything was happening on that front. Not anytime soon. Nesta had made it clear enough she had no interest in Cassian—not even in being in the same room as him. I knew why. I’d seen it happen, had felt that way plenty."
What do you think Rhys means by this, cause I don't see what he "knows". I don't know if I make sense but yeah, I need help understanding this part.