Second Samuel 13:1-22 is an account of the incest of Amnon the son of David with his sister Tamar.
The incest of Amnon was carried out through the craft of Jonadab, Amnon's cousin (vv. 3-14).
After committing incest with Tamar, Amnon turned to hate her and chased her away (vv. 15-19).
Tamar's brother Absalom discovered the incest, and she remained in his house. When David heard about all these things, he was very angry. Absalom hated Amnon because of what he had done to his sister (vv. 20-22).
Verses 23 through 39 are an account of the murder of Amnon by Absalom the son of David. This murder had been determined by Absalom since the day Amnon forced his sister (v. 32b).
Verses 23 through 29 indicate that the murder of Amnon by Absalom was carried out by a conspiracy.
According to verses 30 through 33, the murder of Amnon was reported to David.
David's sons lifted up their voice and wept, and David with all his servants also wept exceedingly (vv. 34-36).
Absalom fled and went to Talmai the son of Ammihud, king of Geshur, and was in Geshur three years. David mourned for his son every day. Eventually, the spirit of David the king longed to go out to Absalom, for he was comforted concerning Amnon, since he was dead (vv. 37-39).