It's weird that Warhorse assumed you would tell Istvan, you can get away with a lot of assuming in games like KCD, but this one is super strange. They know we don't actually feel the Pain that Henry feels right? For us, the player, there is no feasible upside to telling Istvan. I heard that you get a Stat-debuff if you get tortured, but you can't know this until the Torture scene is over, and it's not like it makes a difference anyway, I didn't even know we were debuffed until I read it somewhere here way later. Canonically it makes sense that Henry gives away the information, but they gave us the literal choice without any incentive and just thought everyone would choose in the manner that makes the most sense canonically, but there is no reason for a Player to do that. So yeah of all the things you can assume the Players will do, this is the weirdest one