In Walk Two Moons who is the winterbottom visitor in chapter 33?

The Winterbottom visitor in Chapter 33 of "Walk Two Moons" is Mary Lou Finley, whom Sal's father meets during an evening out. Mary Lou is from Bybanks and works as a secretary. She has a significant impact on Sal's father, and their growing relationship causes Sal to feel uneasy and question her father's feelings for her mother.