How did Sai Baba's grace impact Damu Anna's personal life according to the provided text?

Sai Baba's grace profoundly impacted Damu Anna's personal life by fulfilling his deep-seated desire for children. The narrative in Chapter 25 explains that Damu Anna, a wealthy man, had two wives but remained childless. It was specifically through receiving Sai's blessings that this situation was resolved, and he was blessed with sons. This event is highlighted as a prime example of how Sai Baba wards off the misfortunes of his devotees and grants their desires once one-pointed faith is established, showcasing the Guru-Mother as an 'Ocean of Mercy'.