Seleucus remarries a woman named Stratonice, and when Antiochus feels lustful upon seeing his stepmother Stratonice, he falls into a sense of shame and attempts to starve to death.
When Antiochus was dying, Seleucus sent a doctor to save him.
When Antiochus realized that he was lovesick and the target was his stepmother, he reported it to Seleucus.
In the end, Seleucus divorced his wife and married her with Antiochus.
*She already had one child when she divorced Seleucus, but later remarried Antiochus and had five additional children.
Stratonice was younger than Antiochus.