My wife is threatening to file a false case against me and my family. She’s using this to blackmail us. What can I do to protect myself and my loved ones? What are my legal rights in this situation?

You can approach the police with evidence of her threats and blackmail, seeking protection under Indian law. If you have credible proof of her false accusations, you can file a counter-complaint for criminal intimidation and defamation. You should consult a lawyer to understand your specific rights and legal options.