Wife torturing husband threatening him to leave his job

Sir, my son, working at Nagpur in a pvt co. is constantly being tortured by her wife. she always tries to demoralise and demean him. Me & my had gone to Nagpur to pacify the atmosphere there but she abused us and treated us badly & we had to leave. she tries every bit to prove him lier and untrustable man so that he is shunted out from his office also. she has threatened my son that she would see how he continues in office. my son has stopped eating anything in his own house fearing his life. He has contemplated ending his life to get rid of her torture. kindly advise legal remedy if there is.