I live several hours away from my sister, and drove out to see her for a few days. We had plans to go out to dinner after getting tattoos at a place we had made an appointment at months prior. I recently got 2 prominent parts of my chest pierced, which my sister is aware of, and has actually had done in the past herself. Anyway, the outfit I chose for said outting was a crop top without a bra and a jean skirt (not long, but not too short), thinking it wouldn't even be a thing, but as soon as my sis sees, she immediately says "Um, you cannot wear that out with me! Go change!" I was taken aback by her demanding tone, so I just said "Why?" Her tone was already hostile, so when she responded that she didn't want to be seen with me with the outfit I had on and said it was completely inappropriate, I didn't feel like compromising with her. I told her that I disagree about it being inappropriate, and she proceeded to get even more flustered. She finally said we just wouldn't go if I didn't change, and I agreed. At that, she went full throttle. She yelled at me saying that "I was ruining our plans and all I had to do was change." I relented just so we could go get our tattoos, but later during our visit, I explained to her that that was not okay, and quite frankly - given the chance to do things over, I'd have not changed my outfit and made her cancel our day of fun plans over something so stupid. Instead of apologizing, she simply stated that all of her friends agreed that my outfit was completely "not okay," and that she was right to be embarrassed to be seen with me. I told her what her friends think is irrelevant to the situation. Ultimately, it came down to her demanding and manipulating me to into changing rather than explaining it to me in a way that involved her feelings (and I'm sorry, but I just don't feel like "I'm embarrassed to be seen with you" is the appropriate feeling), and not her friends' feelings on the situation. AITA here? Tldr: AITA for being mad at my sister for demanding I change my outfit in order to go out to dinner and to a tattoo appt we booked months ago?