What does Antigone ask Ismene to decide in

In the play "Antigone" by Sophocles, Antigone asks Ismene to decide whether or not to help her bury their brother, Polyneices. Polyneices has been declared a traitor by Creon, the ruler of Thebes, and his body has been left unburied outside the city walls. Antigone believes that it is their duty as sisters to give Polyneices a proper burial, in accordance with religious custom and family tradition. She asks Ismene to join her in defying Creon's edict and performing the burial, despite the risk of punishment. Ismene ultimately refuses to participate, fearing the consequences of disobedience.