1. She cannot file another similar case especially when the previous one is still pending at FIR stage.
She cannot play with law as per her desire.
2. The rental agreement is between you and the house owner. You can settle the issues of rent, refund of security deposit etc with the house owner by informing him that you are vacating the house. Before leaving the house, you can inform her that you have vacated the house and you will be leaving now, hence she can leave the house after your departure, if she is not leaving or agitating it is her problem and the house owner problem.
3. Once you yourself is not going to stay there how will she demand to stay there?
4. Legally you cannot prevent her from entering into her matrimonial home until she is your legally wedded wife.