5. Condition for a Hindu Marriage.- A marriage may be solemnized between any two Hindus, if the following conditions are fulfilled, namely:
(i) neither party has a spouse living at the time of the marriage;
(ii) at the time of the marriage, neither party,-
(a) is incapable of giving a valid consent of it in consequence of unsoundness of mind; or
(b) though capable of giving a valid consent has been suffering from mental disorder of such a kind or to such an extent as to be unfit for marriage and the procreation of children; or
(c) has been subject to recurrent attacks of insanity or epilepsy;
(iii) the bridegroom has completed the age of twenty one years and the bride the age of eighteen years at the time of the marriage;
(iv) the parties are not within the degrees of prohibited relationship unless the custom or usage governing each of them permits of a marriage between the two;
(v) the parties are not sapindas of each other, unless the custom or usage governing each of them permits of a marriage between the two;
11. Nullity of marriage and divorce- Void marriages.- Any marriage solemnized after the commencement of this Act shall be null and void and may, on a petition presented by either party thereto, against the other party be so declared by a decree of nullity if it contravenes any one of the conditions specified in clauses (i), (iv) and (v), Section 5.
Ur query is unclear .... i gather that u wish to say that he was already married / was father ... if so u can file application or nullity of marriage.