How to safeguard hard earned saving from an evil mind wife who may file a DV/498 wrong case

I am a married man having 8 years old kid. I have been married since 9 years. My wife is an evil mind woman who has an extremely bad intention towards my hard earned little savings into bank account which i have been able to save so far. With due support from her family, she has been constantly threatening to file DV case against me and my family, if i don't meet her expectations to handover my bank account savings to her. It has now become a frequent black-mailing. More importantly, she doesn't have any genuine intention to be part of married family life, rather, she is looking for an easy way to get money and live rest of her life, as per her wishes. 1. I request all the experts here to share their comments for the preventive steps which i should follow to avoid the major impact later on, when the evil mind wishes to fulfill her greediness. 2. If my brother and parents disown me legally, will it safeguard them from getting into any trouble, as they are living separately from me and it would be just unfair with them to be dragged due to someone else wrong intention. Many Thanks for all your support. I wishes to take professional assistance as we go further. Thanks again !!