Why did Madhavrao Deshpande travel from Shirdi to Nagar, and what did he discover upon visiting his father-in-law's house?

Madhavrao Deshpande's trip to Nagar was prompted by an urgent telegram he received from his father-in-law. Chapter 51 explains that the message stated his mother-in-law was very ill and that he should come immediately with his family. After securing Sai Baba's permission, Madhavrao promptly took the train to Nagar to attend to the situation. However, upon arriving at his father-in-law's house and resting a little, he visited his mother-in-law and saw that her health was actually fine. This surprising discovery suggests that the urgent telegram was a divine pretext, a means to bring Madhavrao to Nagar at the exact moment he was needed to help Kakasaheb Dixit get to Shirdi.