Hmm... Well. It sounds like he may have trusted you still. Why, even I would trust you! You sound very earnest, darling.

[(Monsters could be led to trust anybody they meet, this isn't difficult to do.)

But Mettaton doesn't have the whole story, nor does he understand what difficult means, or what deceit looks like here. But he continues regardless, spinning stories in his mind based on limited information.]

But! Did he ever give you reason to trust him, darling? I imagine that, if things were difficult before... he must expect that you don't. [Camera's off, but he snaps anyway.] Yes! This is where boldness steps in, darling. You should be forthright, and ask him what he wants!