What is the inciting incident in buried child?

The inciting incident in Sam Shepard's play "Buried Child" occurs when the character Vince returns home to his family's farmhouse after a long absence, accompanied by his girlfriend, Shelley. His arrival exposes the family's deep-seated dysfunction and the dark secrets they have buried, particularly the revelation of a hidden family tragedy involving a deceased child. This moment sets off a chain of events that unravels the family's facade and confronts the themes of disillusionment and the American Dream.