[Nero stops as well, pivoting to face him with a that glower out in full force. He folds his arms and looks very skeptical as Vergil tries to argue with him.

All this because the guy can't cop to having a little vertigo...]

I'm not a little kid. We're both adults. I get to look after you the same as you'd look after me.

[And FURTHERMORE...]

Why? What "little reason?" Do you guys not get sick or something?