[Maybe she should be upset at hearing it stated so bluntly, but Undyne was never very good at subtlety, so it's kind of a relief to just say it outright and stop dancing around the subject.]

If I'm really not gonna just go to dust again, then I think I'm more worried about what I left back home.

[She looks grim.]

Because if that was just my dream, then they're still out there, and I don't think they were planning to stop anytime soon.