The more he makes Dad Shelby talk, the more likely it is Wally will make the start of the movie. But Dad Shelby is on to him. He realized this was a classic, manipulative tantrum. Dad Shelby thinks he knows what to do. Handling emotions is never as easy as it seems to people without children.
Anger can be particularly difficult for parents to handle.
Mom Shelby is an expert with emotions. Dad Shelby is learning. Mom Shelby knows that when parents are angry with each other, they should handle their anger privately. While it is okay for children to know their parents disagree, parents need to settle their differences privately. Also, children will occasionally be hurt by life itself or by their friends.