First there should have been an act of domestic violence as defined under the PWDVA. And there should be sufficient proof, beyond reasonable doubt regarding the said act of violence.
Without proof, just allegations cannot prove that domestic violence has happnd.
For every allegation made in the DV complaint and the ensuing affidavit by the petitioner, there should be documentary evidence.
For eg: If petiotioner is telling husband used to beat me black and blue, there should be a Medical Report issued by government doctor or CMO as documentery evidence or there should be a video which shows that the husband used to beat the wife.
And it is matter of time that the DV case gets dismissed.
Even if your wife goes and sits at her mom's house and then complains that she has been thrown out of the house and is homeless, the husband here should be able to provide rent to such a woman, or should tell the judge that he is ready to take her back, as wife has gone by her own choice she would not like to come back, then automatically it is proven that she left husband's house by her own will as she on the one hand cannot ask for accomodation and tell at the same time tthat she does not want to go back to the husband.