Istredd inclines his head to Sam in gratitude when he tells him he did a good job. Outwardly it seems casual but inwardly it does mean something to him. He's not good at this, so little things like that, are reassuring. He hasn't been informed about what the meeting is, only that Geralt asked him for it, although he does have a suspicion.

It's why he doesn't look surprised at Jaskier simply stating it, sighing almost at the same exact time as Geralt, glancing over at Thancred too. It's not a judgmental look, it's not the first time any of them have considered how to handle the queen, he just wasn't aware if there was a real plan in motion.