Who is Nita Wembley from The Last of the Menu Girls and what is their importance?

Mother of a student in the children's drama class at the college, Nita and Rocio meet at Nita's garage sale, and Rocio ultimately rents an apartment from this woman. Nita obsesses on the negative aspects of her life - the hard work of managing her husband's properties, having a child to raise in middle-age, and her past breast cancer. She is the universal "complainer", despite her obvious opulent lifestyle that most would envy. She becomes furious when Rocio takes in a pregnant cat that has kittens and threatens to ruin Rocio's reputation in the drama department. Rocio quickly finds another, cheaper apartment.