Protecting the family

We live in Europe. Myself,1.6 year old daughter, wife. My wife is very abusive and does not hold back on calling names about me or my family in front of our daughter. My daughter recently said the swearing word back without knowing anything and i am disturbed. My wife has been under going counselling from the past 6 months and it gets worse. The counsellor and their clinic have asked me to be prepared for the worse in future and i must take a decision to protect my daughter from this behaviour. They have also mentioned in case of a divorce they will provide a statement about the psychological condition of my wife. My wife has threatened to kill herself and also the baby several times. Since i live in Europe , counsellor asked me to inform the police without a complaint so that they are aware of this situation if something happens. Her whatsapp messages are my proof for her behaviour and the msgs she has sent. I will be now trying to record her behaviour on phone as best as possible. My question: 1. Will i be able to hold custody of my daughter? If i divorce (This is main reason for me to think about divorce) 2. Wife and her sister have threatened to lodge a case in India for harassment or dowry since they dont want to see me and my family happy. what will be the consequences of such a case? Please advice, my interest is to protect my daughter