Describe Mavshibai's unique method of serving Sai Baba and how it directly contributed to the misunderstanding with Damu Anna.

Mavshibai, whose original name was Venubai Kaujalgi, had an extraordinary and vigorous way of serving Sai Baba. Chapter 24 details how she would press Baba's stomach and side. Absorbed in her devotion, she would twist with both hands, "grinding" his stomach as if churning a pot of buttermilk. This intense service caused her to sway back and forth, and Baba's body would also move up and down with her jolts. It was during this engrossed, swaying motion that her face came into close proximity with Damu Anna's, who was leaning in to serve Baba from the other side. This physical closeness, caused by her unique style of service, provided the catalyst for her playful but provocative accusation that started their quarrel.