After a gracious hostess declines an offer of political favors, the prophet seeks another way to repay her extraordinary hospitality. The primary approach among commentators is that Elisha waits until the woman leaves the room before turning to his servant, Gehazi, to ask how they can properly reward her kindness.
Gehazi identifies the single, profound void in her life: she has no child, and her husband is old. [ביאור שטיינזלץ] notes that while she is wealthy and lacks nothing materially, childlessness is her genuine distress. Gehazi's response carries a dual layer of meaning. [רד"ק] and [אברבנאל] view his observation as a sharp contrast to her earlier statement: she may not need favors from the king or the army commander, but she desperately needs a son. Alternatively, [רלב"ג] and [מצודת דוד] understand Gehazi to be speaking with absolute certainty, confirming that there truly is a massive and fitting reward they can offer her.
In pointing out her situation, Gehazi highlights a twofold obstacle to bringing new life into the world. [מלבי"ם] and [אברבנאל] explain that neither spouse has the natural capacity for having children; the husband is old, and the wife is naturally barren. [רד"ק] and [שטיינזלץ] add that time is a pressing issue. With the husband's advanced age, the clock is working against them, his chances of having a child are rapidly fading, and he is approaching the end of his life. Because of these immense natural barriers, blessing her with a son would be the ultimate reward.
The magnitude of this upcoming miracle is profound. [אהבת יהונתן] notes that it proves Elisha received a double portion of his master Elijah's spirit. While Elijah foretold the birth of Samson to a barren woman, the physical limitation in that case rested solely with the wife. Here, Elisha will overcome a double limitation affecting both spouses. Consequently, [אברבנאל] and [אהבת יהונתן] draw a direct parallel between the Shunammite couple and Sarah and Abraham. Both situations required God's direct intervention to override the laws of nature and conquer the dual obstacles of a barren wife and an elderly husband.