Yes she does have a problem. I have dealt with both kidney stones and migraines, plus a few other maladies. The fact of the matter is that I just used those as excuses to take hydrocodone. Kidney stones come on pretty fast and can be really brutal, hydrocodone doesn't touch that pain, not really. The only thing that works for that kind of pain is a demerol or morphine shot in the hospital. As for the migraines, hydrocodone really only makes them worse due to the rebound headache phenomenon. My head hurts worse when I come down than it did before I take one. The only meds that help with a migraine are things like Relpax and Imitrex, trouble with those is that they don't get you high.
Like I said, I just used my maladies as an excuse to get them and to take them. Even I knew that I was lying to myself and to others. If she is taking that many, then yes, she is addicted, they are very easy to become addicted to.
I'm dealing with my husband's use now and I know how difficult it can be.
Good luck!