Hi Thanks for your approach. I think her situation is post pregnancy , there will be lot of ups and down in her emotions, during this period she require a lot of emotional support, If not post pregnancy, then I think she is emotionally disturbed of some matter, feeling of helplessness and no hope /confidence of self. this might be disturbing her routine life also. one more thing, as you have mentioned she was working earlier, normally who are workaholic, will feel in this way if there is an break and family pressure. The best is, at the earliest you can take her to psychologist / counsellor for better assessment, based up on their evaluation if any medication is require, they will help for further step. take care. stay positive.
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counselling will help her to the greater extent in handling emotional issues, keep positive environment, give emotional support, if possible she can practice Yoga and meditation