How did Sai Baba reveal his omniscience to Sapatnekar through a conversation with a shepherd woman?

As detailed in Chapter 48 of the Shri Sai Satcharitra, Sapatnekar was deeply troubled after being repeatedly rebuffed by Sai Baba. He finally approached Baba and held His feet, at which point a Dhangar (shepherd) woman arrived. Baba began a conversation with her, but Sapatnekar was shocked to realize that the story Baba was telling was his own life story, including personal details like the death of his son. Although the woman was the one present, the narrative was entirely about Sapatnekar. This miracle made him understand that Baba knew everything about him, as clear as a 'gooseberry in the palm of the hand,' filling him with deep respect and wonder.