divorced wife challenging decree of divorce after husbands death for Family pension

Appeal against the decree of divorce is already time barred as it should have been done within 90 days of such order of the district court/family court. Secondly, the setting aside of ex-parte decree of divorce can also need to be justified for not done at earliest rather waiting for another 2 marriages of the husband and after his death. No justified ground seems to be with such divorced first wife.