John Gill Commentary 2 Kings 4:16

"And he said, At this season, when the time cometh round, thou shalt embrace a son. And she said, Nay, my lord, thou man of God, do not lie unto thy handmaid." — 2 Kings 4:16 (ASV)

And he said, about this season
In the next year:

according to the time of life ;
the usual time women go with child:

thou shalt embrace a son ;
in your arms, that shall be born of you, which she should have in her lap, and in her bosom:

and she said, nay, my lord, do not lie unto your handmaid ;
or speak unto her what was not truth; it was so great, and so unaccountable, how it could be in her circumstances, that she could not believe it to be true, though she wished it might; or do not deceive me with vain and false words, or flatter me, jest with me, which would be unbecoming his character as a man of God, and prophet of the Lord; according to the Targum, she wished it might prove true, and she not deceived; see (2 Kings 4:28) .