Who is there?

Act 1.2 lines 146-171
This part of the scene illustrates the malleability of human identity and how much of it depends on what others perceive us as and how that influences our actions. Spurio’s perception of the Duchess’s behavior to his identity in turn causes Supiro to alter his own behavior in accord to her own and eventually creating his own self-fulfilling prophecy. She gets him to, within seconds, to see himself as a bastard who was unjustly taken away deserved rights by his father’s sins. And therefore he determines that he be revenged and starts off with the Duchess. The Duchess’s smoothness and charm changes his attitude towards himself of his father’s son to the “curse o’ the womb, the thief of nature begot against the seventh commandment.”
Act 2.1 lines 184-188
This is also interesting (going along with the construction of a person’s identity). Vindice, disguised, attempts to convince his sister (although not his real intentions) to have an affair with Lussurioso. In return for the affair, Lussurioso will lift up the family’s status with money and gifts. The mother is pro-affair and places the money before her daughter. However, Castiza holds onto her morals and values despite the “changing times” and monetary benefits of the affair. It seems that Castiza’s identity as a chaste woman is not so easily influenced. Yet, the reason for her importance of chastity is mainly due to her sex and what she’s been told is appropriate for her sex. So in the end she is still playing the role that has been given and forced upon her.