Hey! This is an update to my original post, which I don't know if I can link without the bots thinking it's advertising. Basically I was asking for advice on my little sister turning into a literal Mean Girl and constantly making rude comments for no reason and saying they were "jokes". If you want to read that one, it's on my profile, from about 5 months ago as of the time of posting this. The update will also be in that post.
Anyways, onto the update.

So, it got way worse before it got better, but boy is it getting good. Y'all are probably gonna enjoy this one. Okay, so two weeks ago Olivia finally got called out on everything. Mom and dad were both sick of her constant attitude, disrespect, and the way she treats me and our other sister. for context, the first part of this happened on a Thursday and the second was the following Monday. She gets grounded on Thursday because of how she's treating us and is grounded for a week (A day or two grounded isn't a big deal. A week is big, and longer is BIG. Well I get to watch the entire thing, with my parents pulling ALL of it out; my mom called her on how far she goes when insulting us and dad is sick of how entitled she was, everything. It was very cathartic to finally see them acknowledge everything. Afterwards she starts screaming at our other sister again so I go tell my parents she's still doing it. Dad drags (not literally but you know what I mean) Olivia out to the living room and tells her to sleep on the couch that night. Olivia starts complaining to ME like I'm gonna take her side and when I don't, she just went quiet. She then directly ignored dad and went back to bed in her bed, and I got to listen to him wake her up and kick her back out to the couch.

That following Monday, she still hasn't changed her behavior despite getting yelled at for any shitty thing she does. I'm talking with my mom and dad walks in and announces that the girls don't need their phone anymore, for good. Context: I didn't get my own cell phone until I was 15. At that point, my parents also got my sisters a phone to share between them. Before I got my phone, I had a cheap little trackphone that was only for when we were home alone in case of an emergency.

Anyways, mom goes in to get Olivia's story and try to talk to her, and I finish up making dinner. After a good 20 minutes of them in there, Olivia comes out and grabs one of the plastic grocery bags we keep in the kitchen before going back in. Our other sister comes out and when I ask what's going on, she tells me mom is making Olivia put all of her makeup and skincare stuff in a bag. She got grounded from her MAKEUP, which was the only thing that really seemed to hit for her.

Since then, she's mostly stopped talking to me. Sadly, I have to admit I prefer it to when she was talking to me. But, when she does still talk to me it's worse than before, and literally everything she says to me has some sort of insult.

I've done my research (including the actual, official DSM-5) and realized she's most likely a narcissist, though of course my mom says otherwise and I'm not in a place to officially diagnose, the DSM-5 is literally what the official tests go by so I highly doubt I'm wrong on this one. It wouldn't be that far-fetched either, because our biological grandmother on my mom's side is a diagnosed narcissist and our dad (he adopted me, but the other two are biologically his) has Bipolar.

Anyways, yeah, she finally got called out. She's still treating us like shit, but I've got a few little ideas on how to handle that in the shadows until I can move out. Hope y'all enjoy the update!