Sans watches the exchange like someone watching a tennis match. This is, uh. This is a lot more awkward than it was a few minutes ago when Mettaton was just asking him personal questions. Family members yelling at each other is one of his least favorite things.

He sits back a bit, waiting for things to die down.

"uh, well. i guess the kid has a point...mirrors are bad news."

Both regular mirrors and actual Mirrors, as far as Sans is concerned.

And then Mettaton actually yells, and some small part of Sans's soul wrenches away, as if it wants to go hide under the bed as well.

He folds his arms and settles against the bed again, not quite even looking at Mettaton as he tries to explain things.

"nah, it's okay. event's stressing everyone out, yanno? kids'll take it harder than most."

Kids get scared. Kids count on the adults around them to keep their cool, to know what to do. To not--

Anyway.

"who're they mad at? it's not, uh...is it me?"

Couldn't be, right? It's gotta be someone in the mirror. Someone who might've been watching. Probably not Sans's own Mirror, since Sans hasn't heard from the guy in months now.