But, just in case he had angered the prophet with all his heathen worship, Jeroboam decided to send his wife in disguise. You see, by this time, the prophet was blind, and Jeroboam thought he could pull a fast one on him. However, all that time Jeroboam had spent away from the one true God must have made him forget that God could see just fine: "Now Ahijah could not see; his sight was gone because of his age. But the Lord had told Ahijah, 'Jeroboam’s wife is coming to ask you about her son, for he is ill, and you are to give her such and such an answer. When she arrives, she will pretend to be someone else.'" (vs 4-5)
So, the gig was up before it had even begun. Ahijah delivered bad news to Jeroboam’s wife, and shortly after, Jeroboam’s son died. The salient point in all of this? God is not blind. In this particular instance, God’s prophet was blind, but God told him who was coming. He was not fooled by the queen’s disguise.