My favourite and most unhinged theory is that Nesta knows how to read Wyrdmarks. Mama A taught her (and only her) how to read and write them. They were at the entrance of the cottage so either she or their father put them there. Feyre definitely wouldn’t know them. That’s a given. And I don’t think mama A would have bothered with Elain. But with Nesta?? Yeah she definitely would have taught her eldest.
And who knows, maybe that knowledge could be useful to her if let’s say… she were to world travel to Erilea 👀👀 and would meet a certain witch queen?





