Equal right for Parents on kids

Hi Sir I am married and staying away from home with wife, kid and wife's mother. Both of us are working. My parents are staying in home town alone.Our son is born after 8 years of marriage and because of that she is very possessive on him and don't like anyone to make more control over him except her mother. MIL is utilizing this situation effectively to stay with her by supporting all these activities. They stopped visiting my home and not allowing to take my son to my home. MIL staying with us causing all the issues controlling her. Multiple times we tried to resolve this with the hep of mediators and still its nt getting resolved. I am very much in a dilemma as I don't want to make any harm to my only son's future taking any drastic decisions. But at the same time I want to take my family to my home and functions happening in my family. Is there anything law can support in this case or what will be the best thing to overcome this. Please keep this as confidential. thanking you