She's annoyed that I didn't allow her to go dress shopping with me (It was a logistical thing, and a rush because a dress I wanted to see was being discontinued). Also, my mother couldn't be there. I certainly wasn't taking FMIL without my mother. Now I won't let her see the dress and she's annoyed. 
She is getting her hair and makeup done with the artist I've hired for the wedding day (Her choice, I did not insist at all - my mother is not using the services).  I told her that she and the best woman need to go first so they can leave the suite so I can get ready.  She's annoyed. 
I'm not backing down on this.  I don't think I'm being terrible, but clearly she's not happy.  We are not doing a first look, so FI will see me in my dress when I walk down the aisle, so can she!