Children are stubborn and unreasonable, always tormenting adults. How to guide them?

That's the result of your colleague being too obedient to her daughter. My daughter has a strong personality, and I will tell her that it is impossible to go back on what she has decided to do. For example, about drinking milk, I will put the milk on the table. If she doesn't drink, I won't talk to her. She will definitely drink it in the future. For a long time, my daughter always quarreled with me every morning about dressing up. I am annoyed that she wants to choose her own clothes regardless of the weather. When others praised her for her beautiful dress, I asked by the way, "Do you think I will dress up my girl?" The answer is yes, of course. After a long time, the girl will understand that what her mother did was right.

Your colleague is still irrational because he knows he can't hit her. Apologize to her afterwards, it is better to follow her from the beginning. Mom really has no authority now. Let's reflect on our behavior. The key is yourself. Change yourself first, and the child will definitely change.