Two version which she can use if she is upto filing it no one can stop her.
1) If you have lived with her for one night ........ then she can file it...........saying that you and your family beaten her on the night of marriage and hence you are leaving apart.
2) She may say that she has just left the matrimonial home and police will belive her as it is a cognizable offence and police need not to come to you to ask the truthfulness of the case (They should ideally as per home ministries guidelines but then they won't get bribe from both side)
That is why I will stick to my previous post as Ideally as per recent guidelines from Home ministries they should call you to check the truthful ness of the case and should ask wife for some prima facie evidence before registering case or try to do counselling but no one does so. ......Still it depends on the state and city you might be living in...........but its always better to take preventive actions as suggested if you are so inclined to believe the possibility of 498a.
BEFORE SPENDING MORE TIME ....... TALK TO A LAWYER.