Joab lays siege to the Ammonite city of Rabbah then summons David, ensuring that the king will get credit for defeating Israel’s last standing enemy.  Amnon becomes obsessed with his half-sister Tamar, enlists a friend to help, then rapes and subsequently rejects her.  Two years later, Tamar’s brother Absolom murders Amnon, then flees to Geshur. We see how Tamar’s tragic story was…