@fighting back & @Jiban Rana: It is very simple, swearing an affidavit before the court in the form of chief examination will also be sufficient to prove that there was no conjugal relationship between both, can she deny his statement before court, if she says that she had maintained the said relationship, before the court, the husband may inform the court that if it is true whether she is ready and willing even now, so that he will withdraw his case and shall immediately take her home straight away from the court directly, after this watch her reactions, if she lies, the reaction will be different and if there is any truth in it she will agree to the offer made, this is no doubt a psychological pressure but that is how this can be proved because the matter is between four walls, hence whatever told is to be believed.Law will accept the circumstantial evidences on the subject.