You have stated that you have filed a divorce case but have got a decree in your favor under section 9 HMA.
Which is the fact? because divorce and sectio are opposite to each other.
If she is a bank employee and earning a handsome salary, she cannot claim maintenance under any section or provision of law.
You can simply repudiate her claim stating that she is employed and earning sufficiently to sustain herself.
The court will dismiss her petition for maintenance under section 24 and also under section 125 c.p.c.
You discuss with your lawyer and challenge her claim properly.