How do I put it nicely that I want to have my FMIL dress a certain way? She told me she was going to wear beige when fi and I first got engaged. I'm scared that she might actually do that. We don't exactly see eye to eye on things. I'd prefer that she dress casual and in a light green (whatever) she plans on wearing. I know that if I don't ask what she is wearing she would never tell me. I don't want to come off snobby. Any ideas?