Vash knows is superfluous, but he still wants to make sure why Nick did it.
Even if his question it's strategically ignored.
It's fine, Vash gets it either way.
And he's okay, Nick. Because you were kind to him; you deeply care about the children, and you care about Livio. You joked with Meryl, you snickered with Roberto, you got in the way more than it was necessary in order to bring him here in one piece.
You showed him that you're a kind soul, time and time again. Tainted,chained by the circumstances, but gentle and considerate nonetheless. He'll never blame it on you. Even if you want for him to, because that will bring you some relief, to be punished for forcing this colourful butterfly into the spider web.
It's okay Nick: the butterfly knew since the very beginning, he has been aware all along. He knew he couldn't escape the spider anymore.
Despite everything, the butterfly and the spider still loves each other deeply, and the butterfly will save the spider; he's grateful for the time he was able to share with you.
If you like Good Omnes, The bastard son and the devil himself, Supernatural, Heartstopper, etc you will enjoy 100% Dead Boys Detectves for real. Hell, Afterlife, QUEER