Shopping with cheap bridesmaids, putting me in this ugly dress.

So yesterday I decided to take my baby sister with me windowshopping for bridesmaid dresses. While we was out we went by the mall and my sister wanted to see how this $400 cheaply made wedding dress will look on me, So with me being a cool sport and all I tried it on 😩It’s horrific!!. LOL This dress is so ugly, it was made out of the bouncy material, spandex .😬 but she was being dead serious about me buying this ugly dress... I’ll post a picture, she’s driving me crazy y’all. My budget is $2,500 /$3,500 for my dress and she knows that. I love her soo much but i’m so close to putting my hands around her neck and becoming a bridezilla. Lol My sister is being so cheap with everything that I mention to her. I want her there beside me but how do I tell her No, without being mean.?🤷🏽‍♀️😩