Please follow: -
Sec. 4 of 125 CrPC.
(4) No Wife shall be entitled to receive an allowance from her husband under this section if she is living in adultery, or if, without any sufficient reason, she refuses to live with her husband, or if they are living separately by mutual consent.
https://indiankanoon.org/doc/1056396/
Clearly, wining of 498A is a very good evidence to prove sec 4 of 125 CrPC, hence no maintenance for her.
Please read each of my posts carefully in the following links for sample petitions and other necessary clues.
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