[ He's working through it in his own head, too, because he's helpful like that. If they talked to Prompto and Gladiolus and maybe explained enough that they were...sufficiently warned, they could get the exhibitionism aspect of it. He doesn't quite trust Prompto not to break into laughter while trying to talk to Noctis, and doesn't trust Gladiolus not to break character as soon as Noctis says anything, but they're arguably the safest bets.

The slap doesn't get anything as undignified as a yelp, but he does jerk and flush when it means he becomes hyper aware of the toy. Shivering, he continues dressing, resisting the urge to go over there and return the favor. Meetings, Ignis has meetings. ]

I spent countless years with the realization that you were it for me, Noctis, before we ever so much as considered a kiss. A few hours of waiting is nothing in comparison.