Question, ladies please give input!

Okay a little background. My mom has pesticide poisoning and lupus. So since she has pesticide poisoning, she can't be around smells. Like cologne, perfume, and any chemicals. Well this has been going on for about 5 years.

Well she always pushes through it and she is a massage therapist, and owns her own Studio. So half of the building is a massage place and the other is a Zumba Fitness Studio. Obviously she doesn't massage while Fitness and Zumba classes are going on. She doesn't teach the Zumba classes but she paid a Zumba instructor to teach the classes. But fast forward to today she's supposed to be having a photographer to come take pictures tonight and they're going to be put in a lifestyle magazine. Well the problem is there is another Zumba instructor that comes and attends the class. She has her own classes , which were three days a week but now she only has classes once a week and so the days my mom has classes at her Studio, she comes. My mom's building is a sent free place due to her conditions that she is in. Well my mom just reminded her again not to wear any perfume tonight, please. Her response was " I'll see what I can do". Also she doesn't want to be a part of the pictures that are going to be taken tonight, but the pictures are going to be taken throughout the whole class. So my mom told her if she didn't want to be in them, that's fine. She would just put her someone so she wont have to worry. Her response was " No thanks, I'll stand where I want and find a spot on my own". (This girl stands right in the middle, so every picture she's going to be in)Remind you my mom is paying the photographer so if this lady is in the photos my mom wont be able to use all of them. She has been so rude since she started coming to classes. The other ladies in the class will try an talk to her, she'll look at them, giggle and walk away. I'm beyond pissed because your not going to disrespect my mother like that. If you were in this position what would you do about it?

Sorry for it being so long.