Mom thinks her daughter has measles, she wants to take her daughter to see her (
So, what is likely to happen? There are no reports of measles in Kentucky at the moment (yes, I asked). Most likely and the best case scenario, the OP's daughter has some other viral rash and will not have measles at all. She'll recover, mum and friends will retain their "measles are not a big deal if you just do the right thing" (oatmeal/baking soda baths, it appears) smugness.
Hopefully, mum will sober up and call the practise with her suspicion before going there. There is a reason that there are elaborate regulations to prevent measles transmission in a medical setting.
If this turns out to be measles and mum did indeed take her daughter to a doctor's practise this morning, I predict we are going to see more cases, like for example here, here and here. The worst case scenario is that an infant will be infected in the waiting room (more likely in practices tolerant of non-vaccinating families), and ultimately dies, like we have previously described.