The size of a room does not designate what type of room it is. The prints will clearly designate the type of room. The room in question will require closed type incandescent fixtures. If she does not want the recessed shower trim type, then use your marketing skills to recommend some other type of legal fixture and maybe you will become the hero instead of the goat.
Flourescent lamps in an incandescent fixture would not pass inspection either. Any inspector that thinks he can change the code because he thinks so should not be inspecting as he is a menace to the industry.
You may not like what I have to say, but it is a free country.