Marraige. Tohmat
I think you should go back because now you have child and the peaceful and safest place for a child is his own house. You need to talk to your husband realize him that you need respect as a wife and as a mother of his child but in my opinion you should not leave your house. You mentioned that your babhi is doing all these in this way she achieves her goal because of your foolishness. You are a good person your in laws will realize soon due to your good behavior. May Allah bless with happy and long life with your family Ameen