Am I right to be angry?

Is it fair to feel mad because whenever my mum wants a job done she asks me (not my sister who only does uni for 3 days and five hours, and I get it’s uni so it’s different but she hasn’t been told to do any “major” jobs since her exams last year) and when my parents implemented a rule where if u swear at each other you lose money and I lost money but my sisters who swore at each it be like 20 times last night didn’t lose any money and when I bring it up to my mum she says “do you really want to bother me about this right now”

And I know I’m incredibly privileged to be worrying about things like this but still.