At ASI, I asked every teacher a question about conflict in practie. Since the beginning, my wife and I had been practicing together with ViolinGirl; but we had begun to sense that conflict during practice was the result of her being overwhelmed by too much advice. No one seemed to think it was a good idea. So we started having only one parent practice with her; and we put the responsibility on rotation.
The result seems to be much less conflict. There’s a reason that they talk about the Suzuki triangle and not the Suzuki square.