What happened when Harriet and Sport went meet Ole Golly's mother?

Ole Golly's mother threw a temper tantrum when she thought they were ready to leave. When Ole Golly reminded her she'd be back the next week, the tantrum stopped instantly. Harriet and Sport found this amazing.

Mrs Golly bobbed away.“Just come here to leave me again. Always leaving. Thought you’d come for good this time.”

“Now,Mother, ”Ole Golly said again,but this time got to her feet,walked to her mother,and laid a firm hand on the bouncing shoulder. “Mother,” she said gently, “you know I’ll be here next week.”

“Oh,that’s right,” said Mrs Golly. She stopped jumping immediately and gave a big smile to Harriet and Sport.