We are not Women Organisation, We men always Advice you to give someone Second chance, even there is 1% goodness in that person. if you think she will not harass you and do same or more trouble again, you can give a try.
but be careful, take all precautions as told in earlier posts.
Judge cannt pass any order of 25K maintenance, there should be justification, calculation and her eligibility to claim that much.
if you prove its a false case or case quashed then sister husband has right to sue her for defamation
to file what proof you have, wait for DV, Maintenance to finish then its easy, you will get many grounds to file Divorce.