AITA for telling my sister she is being a baby when she complained about her wedding cake?

I’m a pastry chef. My sister asked me to make her wedding cake. I said yes and she told me it had to be vanilla and chocolate. I asked her if she wanted a specific design and she said “surprise me”. I thought that was a bit weird but she is very picky so I just let it go. <br><br>I made her wedding cake and it turned out really cute. It was a 3 tiered cake, bottom was vanilla, second was chocolate and the top was a mix. It was really pretty and I had a lot of compliments on it. <br><br>My sister and her husband came up and said it was nice but that she wanted strawberry. I told her that I had asked her if she wanted a different flavor and she had said vanilla and chocolate. She told me that I should have known that she wanted strawberry because it is her favorite flavor. I told her it was too late now and that I wasn’t going to remake the cake. <br><br>She cried and told me I was being mean and that I was ruining her wedding. I said she was being a baby and the wedding would go on if she didn’t have strawberry cake. She got mad and called me an a$$hole.<br><br>I could have made her the cake she wanted if she had given me more notice. But I think she was just being stupid saying I should have known that she wanted strawberry.