What would happen if Janice lived in the underworld and lived somewhere near Toriel's house? Imagine if she proposed they swap clothes and she agreed? Well, this would be the result. Since Janice wears office clothes, they're somewhat revealing, and Toriel doesn't find them very modest, so she's quite embarrassed. Janice, on the other hand, finds Toriel's clothes very comfortable. In case you haven't noticed, she's the brown bear version of Janice.