WS or written statement is repondent spouse's reply to main petition filed by the Petitioner spouse.
once petitine is served and summoned to attend the court hearing, the respondent is supposed to file WS within 90 days.
Offcourse, on first hearing date, respondent files the appearance letter/memo/purshis and then judge generally order the spouse to meet the assigned counsellor.
This counselling happen for a few months, if counsellor gives a report that recon as well as compromise not possible, then on a court date respondent is asked to file WS on a subsequent date. So if respondent is attending all court dates and counselling, Judges do not follow even 90 days norm in family court. Family Court Judges have powers vide FC act to extend the time for WS and it is generally allowed if given a valid reason.
If required respondent may also ask some more time of two weeks to prepare on reasons of illness etc, if other party doesn't object as if respondent trying to delay it deliberately. Delaying doesn't avoid the inevitable.
You should draft WS carefully and ddeny each false allegation line by line etc.
And preferably in english otherwise in proceedings it may become cumbersome.
Please let me know if you have any further doubts.