Back story: A little while ago I posted in the forum regarding my older sister who refuses to wear dresses and threw a tantrum when I asked her to be a bridesmaid because of it. Since COVID happened, my FH and I are changing our venue location and now have a lot on our plate. We both agreed our wardrobe decisions for our wedding party will be decided once event logistics have been made.
The other day (Monday around midnight to be exact), my sister out of the blue decided to text me saying that some of my bridesmaids should consider wearing rompers so she could wear one as well and basically get out of the obligation of wearing a dress I would potentially pick out. Mind you, I have made no decisions on the bridesmaid attire front, but felt ambushed when she basically tried to force my hand in making the decision right then and there. I responded and explained that I would keep her views in mind, but at the end of the day it was my decision and that neither my FH or I have even gotten to the point where we are deciding who is wearing what. Additionally, I had a conversation with my mom about the situation. Basically, I was told to let my sister have what she wants even though it is not my sister's decision to make. The lack of parental support on my end only fuels the drama and creates additional stress on top of having to change our venue.
Any suggestions on how to approach the subject? Additionally, anyone have advice on how to approach a conversation with my mom about backing me up on decisions rather than letting my sister run the show?