Dont panic. If you have details of her bank accounts and if it shows deposits of her salary then its a crucial evidence on the basis of which a prudent/ competent lawyer can fight against awarding any maintenance or less maintenance to your wife.
What is the qualification and previous work exp of ur wife ?. If she is well educated and has previous work experience then she cant sit idle to claim maintenance from husband. Browse similar queries on maintenance on this forum......, there are ample judgements from APEX/HC wherein maintenance is denied to working/ capable to earn & well educated females. There are judgements where wife was not working at time of filing/claiming maintenance but based on evidences presented to court on her qualifications and previous work- exp the maintenance was denied/awarded less.
If she is working now then how much time will it take to find that out if you monitor her daily routine with the help of a detective for 2-3 days. Dont think much....Its time to gather evidence as much as possible.
Claim for hefty alimony/ one time settlement will be on the way, so dont get puzzled/ surprized.....fight on basis of merits.
Do remember you may not succeed at lower court so be prepared to appeal in HC in case the order is not based on merits.
You need to hire a competent lawyer who has vast experience in divorce.maintenance related matters to defend ur case thats crucial. All the Best !