The exact opposite happened with me and my wife. Although I am the primary applicant, she receieved her fingerprint notice about six months after the transfer (July 2002), and I hadn't. Well, finally I got my fingerprint notice last February, and did it.
Well, if your wife's fingerprint notice comes in when she is in India, there is no problem because she can go on the make-up day (which is Wednesday of every week). However, she has to be fingerprinted within 84 days of the notice date (not absolutely sure about the exact number of days). Your notice clearly advices about the make-up days.
Hang in there man, I am trying!