Why does berniece come downstaires?

Berniece comes downstairs in August Wilson's play "The Piano Lesson" to confront the tensions surrounding the family's history and the piano that symbolizes their heritage. She is motivated by the need to protect the piano from being sold by her brother, Boy Willie, who sees it merely as a means to achieve financial success. Her descent represents a pivotal moment where she must reconcile her family's past with her own identity and values. Ultimately, Berniece's actions reflect her struggle to honor her ancestors while asserting her own beliefs about the importance of their legacy.