My wife not allowing me meet my 2 year old child

We are married for 6 years, Just after few days of marriage, my wife starts complaining about my mother and convinced me to stay with me in my working place. Her actual intention was to prepare for a job and her father can also stay with her. In her family, she is the only child and her mother has expired. She never wants to go to my parent's house and always try to force me to stay away from my home and also not allowing me to send money to my mother. During the stay, she always made abusive comments about me and my mother and brother. After getting a job in her hometown, I observed that her behavior was changed and she is always trying to show herself as an unmarried woman at her workplace. By checking her phone I found that she is emotionally attracted to one of her colleagues. I questioned her about that, she just denied and abused me very badly. when I left her house, she is not allowing me to meet my 2-year-old son, for child future, I want my child custody. What should I do?