And he said unto him, Why art thou, being the king’s son, lean from day to day? wilt thou not tell me? And Amnon said unto him, I love Tamar, my brother Absalom’s sister.

so he asked Amnon, “Why are you, the son of the king, so depressed morning after morning? Won’t you tell me?” Amnon replied, “I am in love with Tamar, my brother Absalom’s sister.”