I am a married man and married since 3 years. My wife has a very close friend(woman) they always talk over phone. After marriage she suddenly started saying her to leave me and live with her. I think the friend is lesbian. Then she started to black mail that “if you quit talking I will do suicide and put your name on writing” etc.Now that my wife stops talking with her she starts to send abusive sms and phone calls and threatening to destroy her family life and will post obscene fabricated photos of my wife in social networks etc. We are now not communicating with her but the sms keeps coming. What can we do legally before more damage is done?