Can you recount the details of the quarrel that broke out between Damu Anna and Mavshibai while they were serving Sai Baba?

Certainly. Chapter 24 describes an incident where Damu Anna, a man over fifty, and Mavshibai, a mature widow, were serving Sai Baba. Mavshibai was pressing Baba's stomach with such absorption that she was swaying, and her face came close to Anna's. In a humorous spirit, Mavshibai accused Anna of trying to kiss her. Anna became defensive and denied it, and a quarrel grew between them. Seeing this, Sai Baba intervened not with anger but with a clever trick. He lovingly remarked on the supposed impropriety of kissing 'the Mother,' which immediately pacified both of them and turned the entire situation into a joke enjoyed by all present.