My in laws trying to separate me from wife and child

What should I do...? My wife parents are separating my child from me & threatening me saying I'm black mailing their daughter... I'm being married for 21months & have a 9months old kid. My wife stayed with me only for 5months with me. Each time their parents are preaching to separate me from my mother. Separating my son from me since 6months & they say now her daughter will go to job & take care of child. Our elders had twice settled the issues with us. She is not willing to come to family counseling. Nor OK for divorce. All this is happening becoz of her parents influence her from back. Bcoz I'm the only son for my mother & initially blamed about my mom later it was concluded by my relatives (that my mom is innocent) But now again they started blaming me.. forcing me to buy a property in their native. Her parents are too much interfering in my personal life incl my salary expenses for mom medical bills. Please let me know how to proceed.