Now, by fitted did they actually have a 32G for her to try on and see if it felt right?
When you get up into the DDD and above you get into wishy washy waters. I've been DD or higher since High school, and it becomes more about personal preference than specifically measurements.
Just a couple weeks ago I was measured as a 38G at Lane Bryant. They didn't have any that size at that shop so I ended up going to another one the next day and after trying some on I found that I am actually more comfortable in a 38F.
My preference is solid support. I don't like my chest to move at all. With the G I felt too.. wiggly and uncontrolled. The F holds things snugger and brings me to my comfort zone.
Just something that I dealt with recently that came to mind when I read through your OP - don't go and buy a bunch of things online(and have to pay bunches to ship them back) until she knows for sure that 32G is where her body and mind really do meet.
~And try lots of styles in a size. One bra may feel like all kinds of fuck but another in the same size is perfect.