If you cheat on Dustfeather with Duskfall, and he says "Just a *FRIENDLY* walk, right y/n?" and your character asks "should I leave Dustfeather?" and you say yes, he will get angry with you. If you say no, he won't get angry but you can still go on the walk and choose to be mates with Duskfall. Otherwise, and with other characters, he doesn't get angry.