John Gill Commentary 2 Kings 4:14

"And he said, What then is to be done for her? And Gehazi answered, Verily she hath no son, and her husband is old." — 2 Kings 4:14 (ASV)

And he said
That is, Elisha to Gehazi, when he returned to him, and told him what the Shunammite said:

what then is to be done for her ?
something he thought should be done in gratitude, the favours they had received, and advises with his servant what could be thought of, he being one about the house:

and Gehazi answered, verily she has no child, and her husband is old ;
and so not likely to have any by him; as children were always very desirable by women, and especially in those days, the servant suggests, that no doubt to have one would be very acceptable to her.