The Law says, since your wife prima facie does not have any income, and you are the legally wedded husband, it is your responsibility to maintain the wife.
So, when there is a dispute and till the time the court decides about any maintenance for your wife..it is your responsibility to maintain your wife...and hence the interim maintenance.
So immediately after a DV case if filed, the court orders interim maintenace...do not put much imporatance on the word "immediately"...because..it takes along time..in my case, the interim application was decided after 1 year of filing the complaint...
The reliefs under the DV act are filed u.s 12 of the Act and the Interim maintenance u.s 23 of the Act.
She must have filed an application u.s 23 of the act, you have to reply to that application. The court will hear both sides and pass an order..a maintenance amount...which will depend on your income..
FOr this, the complainant need not come for any evidence or cross questioning...
After the interim order, the main case will start, in which she has to come for evidence and cross questioning...then you will have all the opportunity to cross question her...
Hope things are clear..
Vikram