Noctis snaps and Nyx just pulls him more fully into his lap, the hand in his hair starts smoothing over those soft raven dark locks. He wants to soothe him more, especially with how much that coughing fit must hurt but he can't imagine how hard this must be for Noctis. He wants to know. Needs to know what happened and what he needs to punish Ardyn for but he doesn't want to force Noctis to relive something so horrific either.

"Shhhh.... I'm sorry." Murmured weakly into his hair. What sort of glaive is he if he's allowed something like this to happen when he's the only defense Noctis has here? He should never have left Noct alone. Which is impractical and he knows that but how can he not blame himself after this?