For a women just words are enough to show, there was cruelty she met. even she was treated royally.
but unfortunatly in india, even man produce proofs judiciary still think man as a villain.
you have to provide solid proofs to prove she harassed you.most of th etim elower court ignore whatever proofs man(husband) gives, only way appeal in higher court.
Alimony is calculated based on the status you both lived together and time to time she can appeal for increase as per her need and requirements.
still there are ways to reduce maintenance Read this