WhyTSC - First of all, congratulations to you and to your wife. I can imagine the feeling.
If I understand you correctly, you don't want your wife to travel in the first few months, but not wait too many more months either, for your current application to be approved. I think that this is certainly a very "special" case that you need to write to the TSC director about. You can explain that when your wife went to India, she had a valid AP and every intention of returning before it expired. Because of the circumstances, you can explain that she wants to delay her trip back. You can give TSC a tentative date for her return and request her AP approval before that date. Get documentation to support your petition before you send it in (Doctor's letter etc.).
One note of caution though: I have seen in several postings in this forum that a pending AP application has to be approved before the person leaves the US for them to be able to use it. In this case, you have to request TSC to make an exception. I think that your congressman or senator will be sympathetic - I would recommend that you use their help. Be sure to consult your attorney also.
Good luck to you. I hope it works out and your wife is able to join you.