[He gleefully sticks it in his mouth, and with an appreciative smile he continues.]

I tried making her a new one with Sokka's fishing line, but she only wore it a little. But we found out that the Fire Nation had gotten it and first they tried to use it to make her help us [Zuko must have been really silly for thinking that would work.], but then they tried to use it to track us. That was... well it was Zuko who had it, that's when he was on the other side. [He feels Shikamaru's trusted enough that he probably knows about Zuko's allegiance shift already, so no need to be discreet about it.] They tracked us to a town, and we were able to escape them, but before we got away I was able to snatch the necklace back from Zuko without anyone even noticing.