Who is Cassie Bumpus from Wanda Hickey's Night of Golden Memories and what is their importance?

Cassie Bumpus, Appears in The Grandstand Passion Play of Delbert and the Bumpus Hounds - The Bumpus daughter who has been in reformatory school. Once she is home she lounges around the house wearing very little, prompting the narrator's Old Man to watch the Bumpus house much more carefully than before.