Dear Mr Counsel,
You also know when you are filing a case it is highly likely you want a divorce and Alimony. Counselling is done for both (Husband and Wife). Since now a women is not same species as it used to be when these laws were made. Especially in the metros this is a fashion where women use husband to fulfil her lust and then look for other man and ask for money after entering his bedroom.
My suggestion is to ask your client to tell you the truth. If crime has really committed then there must be some kind of evidence which your client must be able to produce.
Threatening husband or in laws will make things worse. She has already taken a step by filing a case. Moreover, because of unfortunate statistics where 99% cases are false and filed to settle the scores, even court today are very conscious to provide relief to a woman. You will have to contest and win or see if you can break into boy’s pocket.