Can you summarize the story from Chapter 9 involving the Tarkhad family's devotion and the forgotten offering?

Chapter 9 recounts a touching story of the Tarkhad family's devotion. A devout son, who never ate without offering Naivedya to Sai, was reluctant to go to Shirdi as he feared his daily worship would be interrupted. His father, Babasaheb Tarkhad, promised to perform the ritual. The father diligently offered a piece of sugar candy daily until one day, preoccupied with work, he forgot. Upon realizing his mistake at mealtime, he was overcome with immense guilt and repentance, calling it a great sin. He prostrated before Sai's picture, begged for forgiveness with a choked heart, and immediately sent a letter to his son in Shirdi, asking him to plead with Baba for mercy on his behalf, demonstrating the depth of his sincerity.