The woman probably realized that escaping was hopeless and began to settle into her life,, especially after she became pregnant. Everyone believed she wouldn't run away anymore, so they let down their guard. But unexpectedly, one day she insisted on eating pheasant.
Her nephew was sent to catch the pheasant with her, thinking it a chance for her to clear her mind. Believing nothing would go wrong as he was accompanying her, he did not expect that the woman harbored thoughts of perishing together with him.
The two went up the mountain and chased down a cliff. His elder brother, having lost his son, then turned his attention to his nephew.
He was unwilling, but his elder brother accused him in return, claiming that everyone in the village had bought their wives except him. He could betray them by leaking this information, possibly leading to a police investigation.