Please see Section 123 of Indian Evidence Act 1872.
Evidence as to affairs of State.
123. Evidence as to affairs of State.-No one shall be permitted
to give any evidence derived from unpublished official records
relating to any affairs of State, except with the permission of the
officer at the head of the department concerned, who shall give or
withhold such permission as he thinks fit.
Now the question is whether the said affidavit has been notarized or affrimed by any magistrate of first class? If yes, then it is a valid evidence as per above section and you can file perjury and IPC 190 read with 193 IPC for giveing false and fabricated evidence as a counter case. This offence is punishable for 7 years (IPC 193) imprisonment.
Please apply of Speedy Trial on Top priority. Always remember that the burden to prove her allegation lies on her.
Please follow my each posts in the following links bellow for more knowledge.
https:// https://www.lawyersclubindia.com/forum/Fight-against-misuse-of-498a-ipc--103100.asp#.U6gslUCm9dg
https://www.lawyersclubindia.com/forum/Best-way-to-fight-against-false-498a-103111.asp#.U6gsRkCm9dg
https://www.lawyersclubindia.com/forum/details.asp?mod_id=104564&offset=1