1) if your wife is remaining absent she may not be serious in pursuing the complaint .
2)Delhi High Court has held that CAW Cell has no authority to secure the presence of any person either by coercion or by threat. CAW Cell is only a conciliatory body where efforts are made for conciliation with the free will of the parties. If any person is not willing to go to CAW Cell, he cannot be compelled. You are at liberty not to appear before CAW Cell.
3) on basis of CAW report FIR can be registered under section 498A read with section 406 of IPC
4) you can seek Anticpatory bail from session court if FIR is registered