They take a sip, once they're sure they're not going to cough it all out.

Frisk saw something, maybe, but there's no reaction.

They can't fix the Nightmare King's death. They might apologize for Kuja later, and maybe doing that'll keep him away for real this time. Getting mad would be useless, and exhausting, and they don't feel like they even can. Not a lot of people outside of Pitch can really get them feeling a lot of bad things.

"Kinda strange," they agree.