[Shadow Toriel makes out with Shadow Asgore right back, tangling her paws in his mane of poorly-dyed black hair as she shoves her tongue down his throat.

Toriel glares at them, but decides that at least they've shut up. For now. She turns to Asgore, her expression still perfectly composed.]

So I was correct in my assumption - this is a mere dream. But this "waking world" you speak of... I find it safe to assume it is not the Underground. And yet, you seem to have no small amount of experience with it. Why is that?