Something are up to you, If you still love her? Or even you don't love her any more, but for your children, you want to suffer, this would be very tough for you. Otherwise, if you think no matter how, in the future, your family would break, then you may choose to stay in USA or go back to China.
Better to tell her seriously and directly, warn her that she can't play game.
Thinking about it and chooce which way you want to do.
Good luck!