Toriel sees a bit of moss stuck to Susie's lip.

"…"

"… Well g'bye!!"

Might not also be the best thing to say considering what happened last time Toriel's kids ate plant life that they probably shouldn't have.

It's actually pretty funny to think this : what if no one in Deltarune actually knows Kris' gender aside from Toriel, Asgore and Asriel, and they are just too afraid to ask because they don't wanna sound rude and this has been going on for years ?