A single judge of Delhi High Court allowed wife to file fresh affidavit in a 125 CrPC maintenance proceedings, after husband files a 340 CrPC perjury application.

From Para 8,

8. I have given considered thought to the contentions raised.
The maintenance granted to the wife is as a measure of social justice and the proceedings under Section 125 Cr.P.C. is with an objective to protect women and children from vagrancy and destitution. The Family Courts have been established for adopting and facilitating the conciliation procedure and to deal with family disputes in an expeditious and speedy manner. Section 10(3) of the Family Courts Act, 1984 provides that nothing in sub-section 1 or sub-section 2 of Section 10 of the Family Courts Act, 1984 shall prevent a Family Court from laying down its own procedure with a view to arrive at a settlement in respect of the subject matter of the suit or proceedings or at the truth of the facts alleged by one party and denied by another party. Thus, the objective remains to reach at the truth of the facts, which is a guiding star for the proceedings under the Family Courts Act. Even in terms of Section 14 of the Family Court Act, the Family Court may receive as evidence any report, statement, information or matter that may in its opinion assists it to deal effectively with the dispute, whether or not the same would be otherwise relevant or admissible under the Indian Evidence Act, 1872. Keeping in perspective the aforesaid objective and provisions, the technicalities cannot be permitted to prevail. The learned Family Court after appreciation of the facts correctly permitted the filing of the fresh affidavit instead of amendment of earlier affidavit to enable the parties to bring out any inconsistencies or discrepancies for consideration.

From Para 10, (Perjury proceedings are intact)

10. It may further be observed that any direction by the Trial Court to file a fresh affidavit does not obliterate the earlier affidavit filed by respondent No.1 on record. Appropriate proceedings can always be considered by the Court in accordance with law in case the Court is of the opinion that a false affidavit had been filed in the proceedings by either of the parties. The same does not in any manner adversely impact the application, if any, preferred by the petitioner under Section 340 Cr.P.C.

Index of Perjury proceedings is here. Index of Maintenance proceedings is here.