Can you describe the very unusual way Mavshibai performed service for Sai Baba?

Mavshibai's method of service was quite extraordinary, as detailed in Chapter 24. While pressing Sai Baba's stomach and side, she would become so absorbed that her breath became uncontrollable. The text describes her as twisting with both hands and "grinding" his stomach, pressing and churning it "like a pot of buttermilk." This intense service was said to make his stomach and back flat. Despite the apparent force, which caused both her and Baba to move up and down, Baba seemed completely at ease and did not protest. This unique service was a display of her pure, fearless love and incomparable devotion.