Agreed SuperHero - that's why I had suggested he takes the precaution of seeking to become child's primary carer as well as a court order preventing wife from fleeing with child just in case. At the same time, he needs to build up proofs regarding desertion and cruelty from wife for divorce case. He can't possibly not go to India as his parents and child are there.
By the sounds of it also, if she's in NZ on temporary work visa she seems like she wants PR from there. Mr. Hidden, it may help us help you more if you told us your and your wife's intentions and future plans. Do you both plan to become NZ permanent residents or already are?