Damian takes your presence as an insult. Duke's too new around here to want to try and make enemies.

“Why are you babysitting us? It’s only 3 days without Bruce or Alfred!” Damian scoffs.

“I can stay home by myself! Well, actually, scratch that, I think I’d need a map.” Duke says with an awkward laugh.

Damian is 9 and a devil spawn, Duke is 15 but he moved in only a month ago after his adoption. Bruce and Alfred are going away for the weekend and mainly don't trust Damian not to cause chaos and for Duke to survive long enough without a search party being called in.

So now, you’re babysitting them.