You can file harassment case against her plus should provide proof of her second marriage.

So you don't have to pay her any money.

Dear,

         File police complaint against her for harassment..

         She i not entitled any money from you after divorce.

The divorced wife has no right to claim maintenance after her remarriage.

Thus, legally she cannot claim anything from you now.

As regard to the mischief she is doing, you current wife should lodge a Police Complaint against your ex wife. 

First make a complaint to police.

Write her to stop all such activities.

File suit claiming compensation for harassment and mental torture causing damages to your personal married life.

she can demand "maintenance" even after the ex-parte divorce, until she does not remarry.

She is not entitled to any maintenance from you as she remarried after divorce 

her  husband  has to  maintain  her 

See have no right of maintenance after she is remarried, see if there is no pending court case or anything and she harasses you or your wife phone give a police complaint against her for intimidation for money.

If your wifevontained an ex parte divorce then you have no obligations towards her and if she is misbehaving or blackmailing you file a complaint at the nearest police station in Lucknow.

Regards 

Apply for the divorce decree and order and based upon that file a criminal complaint against her and  her family members.

Regards 

She can't.  You can file a police complaint for harassment.  You can contest the case if she files any

After remarriage, you is not entitle to anything. Avoid her.

Whomsoever she calls or msg ask them to file complaint, and you also file agasint her and her husband that they are blackmailing you that is you not paid them money, they will defame you and ruin your reputation.

you are at liberty to file a police complaint against your ex wife for causing mental harassment to you,

Dear Sir,

A divorced wife cannot be characterized as a wife living separately. Where the marital relations have been terminated by an agreement, the wife would be entitled to claim maintenance from her ex-husband so long she remains unmarried and is unable to maintain herself.

 you need not to worry about this Asi has already got the ex-parte diverse and married she cannot threaten you for anything in case you are facing problem please speak to me and I will suggest you the appropriate way to handle this problem

If she is demanding money you may issue a legal notice to her warning her from indulging in such illegal acts especially in the absence of a court order and also since  she remarried  another person after divorce.

You may  take steps against her if she do not stop torturing you this manner.

You should lodge an FIR against your ex wife for blackmailing you and criminal intimidation.

She cannot ask any money from you after getting remarried after divorce.

1. As per the information mentioned in the present query, makes it clear that she has got ye ex parte divorce decree and you have not challenged the same.
2. She has 13 years to execute the same decree irrespective of the fact that whether she is married now or not.
3. But, yes you will have to see the contents of the order to see if she has been awarded any alimony or not, only then would be able to advices more precisely.