# had never troubled him, saying

"had never troubled him. He had never even asked him" or "had never wanted to make him angry, so he never even asked him"

# Why have you done this or that?

"You should know that what you have done is wrong." 

# born next after Absalom

David was the father or both Absalom and Adonijah, but they had different mothers. Absalom was born, then Adonijah.