Whose wife stabs herself in the play Julius Caesar by Shakespeare?

In William Shakespeare's play Julius Caesar, Portia, the wife of Brutus, does not stab herself. However, she does threaten to do so to prove her trustworthiness and commitment to Brutus. She holds a heated knife against her thigh, causing an injury of her own volition, to demonstrate her ability to bear physical pain and keep secrets. This act establishes her as a strong-willed and loyal character. Her symbolic injury serves as a parallel to Brutus's internal conflict and the emotional wounds inflicted by his involvement in Caesar's assassination.