Another theme could be judgment and ostracism. The family member labeled as a 'whore' may face harsh judgment from the other family members and perhaps be ostracized. This could explore how a family deals with someone who doesn't conform to their expected norms of behavior. Also, it might touch on the theme of redemption. Maybe the story is about how this family member tries to change or be accepted back into the family fold after their actions.
One possible theme could be the breakdown of family values. If there is a 'whore' in the family, it might signify that the traditional values of loyalty, respect, and moral behavior within the family are being challenged.