When she was diagnosed with depression, did they discuss med's? Depending on how deep her depression is it may not be the sort of thing she can handle with meditation and such. If that's her approach then I'd monitor the results very carefully and talk about med's if it doesn't work. If she drops into really deep depression then she may decide she doesn't need help and that you're the source of all her problems and that getting rid of you is the only solution. At that point you'll never get her back to the doc.
