Suicide threats by wife

I am service class person, married in 2014, I have a three and half years old daughter. In August 2016 I have a marital discord with my wife due to which she and my in laws filed cases against me, CrPC 125, IPC 498A and DV act. In the CAW cell the dispute was resolved and after six months we reconciled and she returned back by taking back all cases against me in court. After reconciling in 2017, we frequently have quarrels with each other. Now for the past one year whenever we have quarrels, my wife threatens me that she will commit suicide. Because of her quarrelling nature my old age parents have stopped visiting my house. She also never visits my parental house. Now she has stopped my daughter also from visiting her grandparents. Further in every quarrel she threatens me that she will call her brothers and uncles. Please provide legal advice to following queries a) How to safeguard myself from the suicidal tendency of wife and her threats. b) How to safeguard myself from her brother and uncle from insulting me when she calls them c) How can my parents visit my home and meet their grand daughter. d) How can my daughter visit her Grand parents place.