Of course, petition under section 11 of Hindu Marriage act will result into Divorce. But getting the marriage nullified is better than getting mere Divorce. On nullifying the marraige your wife can not make any claims againt you from the VOID marriage.
Ask Your Counsel/Advocate to file .O.P. before the Judge family Court at Vizag under section 11 and 12 of the Hindu Marriage Act.
I have extracted the provisions for your understanding.
If the first husband dies after marriage with you, it will not make any difference.
Also, you can take aid of ground of fraud also, which is available under section 12 of the Hindu Marriage Act.
The Hindu Marriage Act,1955
Section:-- 11. Void marriages.-
Any marriage solemnised after the commencement of this Act shall be null and void and may, on a petition presented by either party thereto 1[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) of section 5.
Section 12.:-- Voidable marriages.-
(1) Any marriage solemnized, whether before or after the commencement of this Act, shall be voidable and may be annulled by a decree of nullity on any of the following grounds, namely:-
(a) that the respondent was impotent at the time of the marriage and continued to be so until the institution of the proceedings; or
(b) that the marriage is in contravention of the condition specified in clause (ii) of section 5; or
(c) that the consent of the petitioner, or where the consent of the guardian in marriage of the petitioner is required under section 5, the consent of such guardian was obtained by force or fraud; or
(d) that the respondent was at the time of the marriage pregnant by some person other than the petitioner.
(2) Notwithstanding anything contained in sub-section (1), no petition for annulling a marriage-
(a) on the ground specified in clause (c) of sub-section (1) shall be entertained if-
(i) the petition is presented more than one year after for force had ceased to operate or, as the case may be, the fraud had been discovered; or
(ii) the petitioner has, with his or her full consent, lived with the other party to the marriage as husband or wife after the force had ceased to operate or, as the case may be, the fraud had been discovered;
(b) on the ground specified in clause (d) of sub-section (1) shall be entertained unless the court is satisfied-
(i) that the petitioner was at the time of the marriage ignorant of the facts alleged;
(ii) that proceedings have been instituted in the case of a marriage solemnized before the commencement of this Act within one year of such commencement and in the case of marriages solemnized after such commencement within one year from the date of the marriage; and
(iii) that marital intercourse with the consent of the petitioner has not taken place since the discovery by the petitioner of the existence of the grounds for a decree.