[MTT's eyebrow raises a tad at her defensiveness, curious about its root. He laughs a little.]

My my... I only asked. I would never suggest that there's anything wrong with a suspicious walk! Or, anything suspicious about just taking a walk. ... But I also wouldn't have a reason to judge other motivations. [Mettaton glances away, a mischievous edge tugging at his smile.] Either way! As for myself... I was only investigating this new place. And I found you, in a stroke of good luck.