Legal Separation - 498 A Child

Hi Sir, It's been 8 years that we married. We have 3.5 year child. After 2 years of joint family and constant quarrels at home, I left my mom and dad and started to live separately. Even after living separately, my wife has a problem for everything that is related to my parent and my brother. She yells at me. Fights whenever I go to any function of my brother and my parents. Sometimes she get abusive with her words. She goes to her mothers house stays there for almost 15 days to month comes back. She will ask me not to visit my parent frequently. After a fight I came out of my home with my kid. The kid is with me. One of the advocate I approached advised me to go for Legal separation, Even my family wants to give her an ultimatum if things continue we are going for a legal separation so that she gets scared and come to us asking us to forgive. Does this process work for us? What if she gets threatened and goes and files DV and 498A? Is it a risk? I don't want to lose my child not at the cost of divorce. Since children are ultimate sufferers. So what should I do now? Please suggest.