I was thinking about the sizes of the clothing, since that seems to be a heavily discussed topic.
I am taller and heavier than she is suspected to be--I'm 5'7 and 150 lbs. and wear 40C--and have had lots of experiences with weird sizing at stores. I find that clothing sizes really vary from store to store. Over the course of one week, I bought one shirt at Wal-Mart, Target, and Juicy Couture each. For the Wal-Mart shirt, I was a Small. For Target, a Medium. For Juicy Couture, a Large. They all had the same fit on me, which is average T-shirt fit. So sizing really does vary from store to store.
I imagine she could have been petite but curvy. Some girls just have naturally large chests for their weight, she could have been like that. For the underwear, I am confused, but maybe she just didn't like tight-fitting panties.