Grillby was reading Sans' letter. "Hmm."
Frisk,
It has came to my attention, you think you are a bad kid because of what I said during your judgment.
I never meant to imply such a thing and thinking it through, I value that you made it through the underground without any violence. That was an amazing feat.
You're not a bad kid.
Sans.
What a cold letter. Frisk got it before Grillby and stared at it blankly. Grillby thinks more went on than meets the eye.
Grillby wrote a letter of his own.
Sans grabbed his letter when it seemed his cellmate was distracted with a book. "What's that?" Welp, he tried. "A letter from Grillby." And like that, it was snatched out of his hands. After an uncomfortably long, silent time, Dillard spoke, "You are lucky you're leaving soon." The letter was given back to Sans.
Sans,
Frisk is upset. And I do not appreciate your half ass apology to them. Frisk thinks they must forgive you, to be good.
They think this is one of your tests.
I ask you don't contact my ward in the future.
I told Frisk I'd say you're forgiven on their behalf, but I believe they said that due to their fear of you.
Grillby.
"Umm." That's not good. Dillard stood up. "What's wrong, skeleton?" "I messed up big time." "Mmm hmm. Yard time is for obedient doggies. Got it?"
Sans did get it and yard time came way too fast. Sans got a "gift" from one of the guards, a dog rope. And now he was playing tug of war with it. One more day Sans. You can do this.