@ TAKEN FOR GRANTED,
its mandatory to make the adultrator a co-respondent.
RULES OF VARIOUS HIGH COURTS UNDER HINDU MARRIAGE ACT, 1955 PART IV
4. BOMBAY HIGH COURT HINDU MARRIAGE AND DIVORCE RULES, 1955
5. Necessary parties.—(a) In every petition for divorce or judicial separation on the ground that the respondent is living in adultery or has committed adultery with any person1, the petitioner may, however, apply to the Court by an application supported by an affidavit for leave to dispense with the joinder of such person as a co-respondent on any of the following grounds :
(i) that the name of such person is unknown to the petitioner although he has made due efforts for discovery;
(ii) that such person is dead;
(iii) that the respondent being the wife is leading a life of a prostitute and that the petitioner knows of no person with whom adultery has been committed;
(iv) for any other sufficient reason the Court may deem fit to consider.
(b) In every petition under Section 13 (2) (i) of the Act the petitioner shall make ‘the other wife’ mentioned in that Section a co-respondent.
(c) In every petition under Section 11 of the Act on the ground that the condition in Section 5(1) is contravened, the petitioner shall make thespouse alleged to be living at the time of the marriage a co-respondent.