I recently started the bridesmaid attire discussion with my bridal party. I figured I'd make it easier on everyone, including myself, if I simplified the process by explaining that I preferred if the girls found dresses in any style they wanted in whatever budget they could afford (my two bridesmaids have limited budgets and my MOH has a lot more disposable income) as long as the dresses were black. I explained to my MOH that I would like for her to stand out a little more from the other two by wearing a dress that had a little more flair (some jewelled beading, etc). I even provided a few examples of what I had in mind.
I probably should have been more specific in what I was expecting. Yesterday my MOH sent me a picture of a dress she's considering on wearing: a very low-cut gown (more like the front criss-crosses just over the breasts) with an exposed mid-drift on the sides (just hides the stomach area). It's a gown that she could very easily wear (she had a breast enlargement done a few years ago and it has really built up her confidence...I won't take that away from her), however I don't feel that it is appropriate at all (evening wedding at an historical village but formal attire...FH calls it "high-end rustic"). I didn't think I had to remind the girls to consider modesty when choosing their dresses, especially my MOH as she usually wears dresses/clothing that compliments her figure very well without looking scandalous (FYI: she's happily married, so she's not looking to snag a guy at the wedding). My other concern is the reactions this dress will get her: severe disapproval from the women and definite unwanted attention from the men.
How do I explain that the dress she's considering is entirely inappropriate without causing a major fuss or hurting her feelings, and how do I steer her towards the type of dress that I feel will compliment her without taking any attention away from me (I know...that sounds selfish)?