Dear Tajob I agree with your point-1 & 2 what you have stated above as according to limitation act 1963 sec-5.
According to sec -5 ,Extension of prescribed period in certain cases. Any appeal or any application, other than an application under any of the provisions of Order XXI of the Code of Civil Procedure, 1908 (5 of 1908 ), may be admitted after the prescribed period if the appellant or
the applicant satisfies the court that he had sufficient cause for not preferring the appeal or making the application within such period. Explanation.- The fact that the appellant or the applicant was misled by any order, practice or judgment of the High Court in ascertaining or computing the prescribed period may be sufficient cause within the meaning of this section.
But here my prime concern is that the querist has not mentioned the reason which her ex wife had mentioned in her application,whether that is accepted by SC or not?
Here he simply mentioned that he married after 90 days of HC judgement and wife failed to stay aside the HC order in such stipulated period.Hence,my opinion was based on the half facts and circumstances put by the querist.
If her wife gives acceptable reasons beyond any doubts that why she was unable to put the appeal within the appelant period,then SC may held the HC decision to put aside.
But,here again question arises if a person who is married and SC gives set aside his marriage then how come his marriage be called as void?So,I differ from your point-3 & 4
As he had performed the marriage with legally correct concerned after 90 days till no orders had come for the restrain.Here the technicalities of Indian judiciary be called as for No fault default or all fingers will go on her ex wife who did not turned up well ahead.