i feel like somebody needs to talk to your mother though. like i dont know the full situation, but parents are usually to blame for these kind of things (you also said that she didnt say anything which seems pretty faulty to me). i dont know much about these kind of things, but if its as bad as you described it, you should probably so seek help. like family therapist or something.
Well I don’t really think how she acts is my mum’s fault, per say, it’s just that she’s really really bad with discipline. I hardly ever do anything wrong, but she never ever reprimands my sister. We used to have a reward system with pocket money, and if you did something wrong you’d get some of it taken away. But now we both have a steady allowance and my mum never ever takes that away. If my sister does something wrong, the most she’ll get is a stern look. If my mum tells her to go something, eg put her phone away at the dinner table or turn her music down or stop being so rude, my sister will simply ignore her because she knows nothing will happen.
(And this is a personal bug of mine but she doesn’t work hard either because my mum neither rewards us for achievements or reprimands us for bad grades. She wants to be a vet when she’s older but has no motivation to work hard until then. She’s only 13 so it’s not so much as a problem now, but my cousin was the same and smart like her but he failed all his A levels because he wasn’t motivated and didn’t work hard enough.)
My brother will be alright, he’s got me. I just wish my mum would wake up and realise she’s not teaching my sister respect and politeness like she should.