Nah he shoved that shit in his mouth sideways. It's cool. No need to traumatize you guys more. He's surprised when Noct follows him out into the hall and he takes the opportunity to sling an arm around his shoulders and squish him.

"You're young... not there yet and got carried away can be the difference of one too many kisses. Not judging just.. things happen. So before they happen and someone gets hurt I just wanted to... help..." Because as much as Prompto has told him no he still really does care about this sweet sunshine boy and he wants to do what he can to make sure everything is good the first time they do go there. It's part of his weird slut- no harlot nature. He wants to take care of people and that devolves into a lot of caring by sex.

Prompto's off limits but he can still help a little?

"C'mon if anyone's big brothering at you two it's gonna be me. 'side I dunno that Liam's up for doing much of anything just yet." Please don't mind that all too satisfied little smirk.