What happened to the widow of Zarephath's son while Elijah stayed with her?

Answer: He fell ill and died

The widow's son grew ill until no breath remained in him; Elijah then cried out to the Lord and the boy's life returned.

“Later, the son of the woman who owned the house became ill, and his sickness grew worse and worse, until no breath remained in him.”— 1 Kings 17:17 (BSB)