First, talk to your wife privately and tell her that she can't intervene when you discipline the children, whether it is good or bad;

Second, you also told your wife that when you play with children, whether it is good or bad, I will stay out of it, and everyone will trade fairly. I don't think she can teach her children to be the boss of the underworld.

Third, if your wife can't do it, you should try to have a big fight with your wife in front of the children so that the children can see it, and the baby won't look for his mother as a shield next time;

If this doesn't work, you can tell your wife that if you quarrel again, I'll fight with you, and I promise she won't have anything to say again;