ADVICE FOR RUDE AND LAZY STEP SIBLINGS
Hi I am 21 (f) living in a blended family with my mum and step-dad his two kids 19 (f) and 23 (m) and my brother temporarily stating (30). The house is pretty chill and the only expectations is everyone does one chore a week and pays $25 in rent. My step sister is the main issue she is rude entitled never does her chore or does it badly, doesn’t pay her rent but gets uber eats most days she doesn’t study and works a few days a week for many months she didn’t have a job at all. She plays music loud out of her speaker 24/7. Previously we had an arrangement where each person cooks dinner once a week but she would never do it and my step brother would cook a disgusting meal that was very low effort however when I or others cooked they both ate it and extra servings without thinking of others. I spoke to my parents about stopping this arrangement as it wasn’t fair and better if I just cooked all my own meals. My step sister never contributes to groceries at all but would eat my food so I now have a seperate section in the fridge that is just mine. Additionally we have two cats one is ours and one is my step sisters she never feeds them or looks after them in any way and when my parents are away all responsibilities fall to me. Anyways there are a lot more examples of her bad behaviour like taking 40 minute showers when there is one bathroom or putting dirty dishes in the dishwasher when it was broken.
I am close and has a very good relationship with my step-dad however he is amazing and really good in all other ways except parenting flaws. My mum agrees with me but tells me to be the bigger person and to just deal with the fact they won’t change
I need advice on not getting so angry at her or ideas to manage the injustices in the house.