FH and I had to change our wedding date due to my health. Here's the problem...my sister is furious that she can't try her bridesmaid dress on before ordering it (I'm paying). I gave her as many options as I could and asked her to pick one, she did, I thought that was it. She then texted me today saying that she was going dress shopping. I told her I wanted to go with the one she had picked out. Well she wasn't happy with my decision AT ALL! My sister has extreme body image issues and I understand that. I would NEVER think about putting her in a dress she hates or that doesn't look good. The biggest problem is that I know no matter what she wears, she will think she looks "gross", to quote her. And when the dress comes and she doesn't like it, I'm not going to force her into wearing it. I don't know what to do. I have literally never asked my sister for anything. Ever. How can I help her see that it is not ENTIRELY about what she wears, but that it's about being there for me?