[Some small part of Muffet, the part that's been carefully honed by trying to survive in the dangerous world of human businesspeople, quietly nudges her and says that something isn't as it should be. But he's right, that is a very good distraction, and her curiosity is piqued immediately.]

I've heard from others, who had experienced strange things like this before, though I'd had no idea you had been in any of the other worlds they mentioned. What was it like there? Maybe one of them knows you, here.

As for me... nothing terribly exciting, really. I was just in my shop, cleaning up for the evening.

[Something nags at her again, an insistent little piece of her subconscious, pointing out that something is... off, here. It isn't until she catches her gaze drifting absently towards the shine of his armor that she realizes: she hasn't seen him wear that since the Underground. She doesn't know him, not on a personal level like Frisk does, but even though they don't really stop and chat she's still seen him in passing, tending the gardens at Queen Toriel's school or on television, giving an interview about monsterkind...]

[And he hasn't seen him wear armor instead of comfortable street clothes, not once. But he's wearing it now.]

[A suspicion begins to dawn, all their talk about different points in time taking on a new relevance now. There's one easy way to check this, though, one obvious historical event that he can't have missed if he's past that point, so she adds:]

In my new shop, that is. The one I opened on the Surface.