Hi
First of all alimony and maintenace can't be ordered same time. monthly maintenance substinance allowance is ordered as one time is alimony.in short alimony is substinance allowance when a wife can't maintain herself,a according to her husband's living standards.
You are liable to maintain your child till the age of 18.
So under the existing provisions she has demanded such amount and you have to defend you on her faults.so ultimately her allegations of staying separate has to be refuted .
1.you have a defense that she left you on her own and refused to come.back.make.out allegations of cruelty against her.
2.alimony is ordered on the basis of your income and your assets are calculated for the purpose of your financial capacity.
Your family 's income has nothing to do in it.
So it is advisable you submit your salary details and income status.
Is your wife qualified ,if so submit proof,or her earning if she is working.
Yes if she stays separately she can ask for maintenance for herself and child ,but not as as she claimed..
Asking such alimony if you are not financially capable of that much is an extortion.
See the possibility of an amicable settlement where you can minimise the financial burden and end the dispute.if not fight it out