Is AUTHOR wrong in the post ? POST : A year ago I met my SO (lets call her Nicole). She's a sweet and loving person, also really shy. When we began dating I introduced her to two of my closer friends (who are siblings) but for some reason they didn't seem to want to talk with her very much and preferred to talk to our other mutual friend present. By virtue of being shy she found it hard to start conversation, and my attempts at trying to initiate conversation between them was in vain. Later they told me that my SO seemed distant and "unfriendly" even when I told to them that its hard for her to meet new people.

They kept this coldness towards her and I have no idea why, but then a week later I was invited to hang out with them at a park and they let me bring Nicole. They specified that we should meet at 9AM, it opens at 9:30AM. I pick up Nicole and we get to the park on time.They weren't there, and half an hour later they still hadn't texted or shown up so we went to a nearby starbucks. Come 11AM I still hadn't heard from them after many texts and a couple calls to their phones, and we had been in starbucks for nearly two hours. I tried calling again, then Nicole and I started going home.  I assumed something important came up, so I wasn't mad. I was a little annoyed, but if something happened to where they couldn't text or call me then it must've been an emergency. 

On my way home I got a text saying they were on their way. I called and said we had been waiting for hours with no response from either of them so we had left. This completely set them off. One of them started accusing me of leaving so I could go "fuck my girlfriend" and I was ditching them "for that slutty bitch." Keep in mind, they never took the chance to even get to know anything about Nicole yet they were saying this. I told them it was unfair that we showed up at the time agreed on, and we were out for nearly three hours waiting on them without any response from them. They said I shouldn't have left without telling them but then I pointed out all the times I tried getting in touch. This kept going until I started ignoring their texts since half of it was just insulting Nicole. I showed her the texts and we just wondered why they pinned it on her when it was I that drove there and I made the decision to go home.

Ever since, they've been cold towards her. I've brought up how shitty they are to my SO and they shrug it off, saying that they don't have any obligation to like a person. What pisses me off is that we all consider ourselves family, and I always supported them and treated their SOs like a part of that family so they'd feel included. They never make attempts to be nice, and only ever blame her as to why they're so mean and exclude her from events. I really hope this doesn't sound like a SHP because its as dumb in my mind as it might be in yours. AITA for what happened??