This whole interaction will undoubtedly give him a lot to think about when he attempts the futile endeavor of falling back to sleep later on, but most of the processing has been temporarily shelved. There's a lot to be gleaned from this surreal glimpse into more of Vincent's world, none of which Irahl has any context for. There isn't even the personal experience of having siblings to fall back on, for him.

So, he watches quietly, learns a few important points from the interaction while the rest is saved for later, and waits to see where it ultimately goes. He does find himself relieved when Seth calls off this meeting before any more can be said out into the open hallway, and is also pleasantly surprised when he is directly addressed by the other man. He doesn't know almost anything about him, but Irahl can at least guess that he'd be just as likely to say nothing at all to the tall stranger holding a knife. Irahl doesn't take it for granted.

He also answers as if he saw nothing weird happen here.

"Tried. He's better at it than I am, though."