Thanks a lot for ur replies.
i also don't see a problem with that at the khi airport.
My wife got her passport a month before the marriage. The reason i asked this is that the passport office official at that time told her that she shud apply for her passport after the marriage as even if she gets a passport now before the marriage, she would have to apply for a new passport after the marriage to get her spouse name entered on the passport. I think that the official was wrong and i have asked my wife to travel on the same passport. It has got a valid visa.
I hope everything goes fine.