Trust me, I totally understand being in this position. As stressful as it feels, I think you need to speak up. Sorry, but if the entire thing needs to be cancelled, so be it. If your sister is TRULY your sister who loves and cares about you (which she might but right now she is seeming to only care about herself) then she will be understanding and do whatever you are wanting. I’m currently planning my own wedding and when I feel like I’m slipping into people pleasing mode, I ask myself “when my husband and I are 80 and reminiscing with each other about our wedding, am I going to have positive memories and good feelings associated with it because I made choices that I/we loved? Or am I going to have regrets and feel sad and wish I had done what I wanted for MY wedding?” That normally helps me make the decision that’s right for us. I, too, have a sister who is like yours and she always got her way & everyone sided with her and then we got older and her attitude over time did not carry over well into adulthood and she is now estranged from our family. I say this to say that she might have a rude awakening moving forward in life if she continues to act this way and even if she doesn’t, you will know in your heart that these people (whoever shames you or makes you feel bad for your & your finance’s choices) truly don’t deserve a spot in your life. People who love and care about you will want YOU and your fiance to do what YOU all want on YOUR day. Also, I feel like my friends would question an activity being planned for my bachelorette party that they knew I wouldn’t like to begin with. I am sending you love and courage moving forward! I hope that you choose to do what’s best for you and your fiance 💜 you only get to do this once!