32 Just then, Jonadab, his brother Shimeah's son, stepped up. "My master must not think that all the young men, the king's sons, are dead. Only Amnon is dead. This happened because of Absalom's outrage since the day that Amnon violated his sister Tamar.
Matthew Henry's Commentary on 2 Samuel 13:32
Commentary on 2 Samuel 13:30-39
(Read 2 Samuel 13:30-39)
Jonadab was as guilty of Ammon's death, as of his sin; such false friends do they prove, who counsel us to do wickedly. Instead of loathing Absalom as a murderer, David, after a time, longed to go forth to him. This was David's infirmity: God saw something in his heart that made a difference, else we should have thought that he, as much as Eli, honoured his sons more than God.