Maintainance case - Reg wife false income affidavit

Dear sir/madam, This is regarding the Maintainance case, My wife already submitted her income affidavit in the court but after 4-5 hearings she again submitted that she's not working anywhere and i know my wife provided the false details because she changed her job and i don't know the company name where she is working now, she has not provided any document of previous employer so please help or guide me with the below queries: 1. How can i prove that she is working some where without hiring the private detective. She has removed all her social media accounts. 2. Having my wife's UAN a/c no. and PAN so using any one, is there a legal way to know where she is working currently. 3.How to force her legally to provide all documents of last employer in the existing maintainace case. eg. Salary slips, bank statement or resignation letter. 4. Any use of section 91 in the above queries ? Looking forward your positive response. Thanks and Regards, Sandeep