Sh probably isn't in the correct size. There is a lack of bras with small band sizes and larger cups. She's probably really a 32-34 C/D. In all likelihood, she probably relies on the shoulder straps to support her boobs and has a very loose band. I used to wear the incorrect size. I was using a 34 D. My correct size is 30-32 DD/DDD. (Depending on the brand) I have wider ribs due to pregnancy seperating them a bit. I'm about 28-29 inches on my under bust area.