[There. That's the reaction that Alucard expected might happen, and there's a point he makes next. He remains seated. Splays both of his hands flat on his knees to show that he is not armed, and his lack of movement is a point as well. He's as non-threatening as possible in this moment.]

It's simple honesty.

[His eyes remain on Vanessa's, rock steady.]

And I am in league with no one, nor have I ever been. I am utterly unto myself.

[This is turning sour. So Alucard accepts the inevitable.]

You're free to leave if you wish. I understand.