5 months ago when I asked my future SIL and friend to be my MOH I thought it would bring us closer (plus, she is one of the most organized people I know). Turns out I was wrong. She has caused one headache after another. She has planned nothing- my MIL has been planning my bridal shower. She has contacted none of my other bridesmaids about helping with the shower or planning a bacherlorette party. She made one of my bridesmaids cry during our dress shopping trip making comments such as "Oh you dont need to order extra fabric for me but you are definitely going to need to order more for her.." and she fought with me over the bridesmaids dress I picked. The dress cost 130 bucks and she bitched that I wouldn't let her buy the sample dress so she could save some money ($13 is all she would have saved). I'm sorry, I am spending $2000 on photography; she can pay an extra $13 to ensure everyone matches. Now the situation has gone over the edge. She has turned my in-laws against me by insisting that I don't like her boyfriend and am thus breaking up their family. I am so ridiculously confused and outraged. I have tried to go the extra mile to make everyone happy for the sake of my FI but I have hit my limit. Any advice? I know there's not a whole lot I can do, I just needed to vent a little.