Although he was the heir-apparent to David's throne, Amnon is best remembered for the rape of his half-sister Tamar, daughter of David and Maachah. Despite the biblical prohibition on sexual relations between half siblings, Amnon had an overwhelming desire for her. He acted on advice from his cousin, Jonadab son of Shimeah, David's brother, to lure Tamar into his quarters by pretending to be sick and desiring her to cook a special meal for him. While in his quarters, and over her protests, he raped her, then had her expelled from his house. While King David was angry about the incident, he could not bring himself to punish his eldest son, while Absalom, Amnon's half-brother and Tamar's full brother, nursed a bitter grudge against Amnon for the rape of his sister.