I Kings 1:6 And his father had not displeased him at any time in saying, Why hast thou done so? and he also was a very goodly man; and his mother bare him after Absalom.
David had loved Absalom very much. He must have carried quite a bit of guilt over the whole way he had interacted with Absalom. They had been estranged. Absalom had taken over his kingdom. Absalom was not dead.
Now his little brother, Adonijah comes along David loves him. David doesn’t tell him no. He loves him too much and this will lead to problems. Adonijah has always gotten what he wants. Now he wants to be king. David has made a promise and so Adonijah will be denied for maybe the first time in his life.
He is risking his life. He could easily die at the hands of his brother the king. Solomon does forgive him for the time being. But his attitude will always get him in trouble.
Now I need to learn a lesson here. I need to tell my child no early enough that he or she can get used to it. They need to be ready to face adult life. By teaching them the word no I will probably be giving them a better life and helping them instead of hindering them.