So, I (17F) had to go with my mum (49F) and sister, Thea (15F) to see Ashley (my mums friend) and her children: Fournier (16F) and Muriel (13F). Muriel's autistic and has a lower mental age than average thirteen year olds, so basically can't pick up on social cues at all.

Anyway, I don't like meeting them because Muriel doesn't let me get a word in edgeways and Fournier's really obnoxious. Anyway, we met in the park and me and Fournier chatted and Thea and Muriel played together.

Anyway, there's this guy called Barney in Fournier's class who came in when Thea was getting changed and smirked, and he got punished. So, Thea and Fournier go to the same school and Fournier loves to gossip so bought up other things Barney had done (racism etc...) and then mentioned that Barney looked at someone getting changed but she didn't know who. Thea jumped in saying it was her, then they started gossiping and Fournier told Thea to meet her in the toilets when we got to this pizza place to talk about other stuff Barney had done, and they agreed.

I kind of felt excluded, but my mum didn't see why. (She kind of thinks my sister's an angel).

At the pizza place, Fournier and Thea talked non-stop to each other and sat opposite each other. They were facing each other and not talking to anyone else. They went to the bathroom and asked if Muriel wanted to come, but not me. I felt excluded again....

Also, Fournier said some things that made me uncomfortable. My gum was really swollen today for some reason, and it hurt when I ate so I went to the bathroom to check, then when I came back Fournier was giggling like "Oh, I thought you had your period. It's a bit disappointing it was just your gum." Fournier hadn't started hers due to some issue she has with her uterus, but I was uncomfortable AF. She did ask what was under my sweatshirt, but I'm 90% sure she meant my vest because it was sticking out a bit. Also she said she got clothes from the boys' section because the girls ones made her boobs stick out...

So, I told my mum I won't be seeing them again since Fournier's ride with no boundaries. Muriel's sweet, though, so I like her, just Fournier was making me uncomfortable. She says I'm an asshole, so AITA?