Addict behavior for certain, seems to me like there's a few things:
a) she has to be consuming something at all times when she's in the kitchen. The only time she goes longer than 15 minutes without stuffing copious amounts of matter into her face is when she's laying down, and I'm almost certain those lie down streams are post binge of some sort.
b) she has to take MASSIVE bites, she has to have a stuffed "mouth feel" in order for it to "count."
c) she has to eat until she physically feels the feeling of being stuffed, which is a got damn feat considering the size of her fucking stomach.