There is a catch and a solution also... (Is your wife rasing objection? then it is a problem otherwise not to worry!!)
On the day of your marriage....were you both aged more than 18 atleast?
Was female aged 18 years or more? and Was she in conscious/sane etc state?
Was male aged 18 years or more at least although les than 21? and Was he in conscious etc/sane etc state?
In how much time after your marriage ...your marriage thing got exposed?...have you lived together for 1 year or more (is it consumated and cohabited for a year?)...... after the marriage solemnised in temple....
Your parents may not raise objection since you were atleast major although not 21.......but 21 is the age of marriage for males.
So only your wife herself can raise an objection about legality of your marriage in this case nobody else....and not even her parents !! And it may be registed also legally using the time bar waiver of 1 year of period after solemnisation and cohabitation (Sec 12 c of HMA . (the petition presented more than one year after the force had ceased to operate))
So if your wife raises an objection about validity of marriage only then it is going to become an issue (Even her parents won't be able to raise objection because she is also major as well legal age of 18 at the time of marriage.)
There is difference between void marriage and voidable marriages.
section5, and iii therein, of HMA1955 is voidable i.e. it may be annuled (due to circumstances of the case and objection raised by other party of party's guardian) and if criteria of section 12 C of HMa 1955 is fulfilled (the petition presented more than one year after the force had ceased to operate)
section 5 and i, iv and v therein , of HMA 1955. It is void marriage in EVERY case.