I'm sorry to hear that you went through such a difficult and hurtful experience. Deciding whether to inform the other woman about your ex-fiance's actions is a personal and complex choice. Here are some considerations to help you make an informed decision:
Personal Values: Think about your personal values and what you believe is the right thing to do in this situation. Consider honesty, empathy, and how you would want to be treated if you were in her position.
Consequences: Weigh the potential consequences of telling her or not telling her. Consider how it might impact her emotionally, her relationship with your ex-fiance, and your own emotional well-being.
Intentions: Examine your intentions for wanting to tell her. Are you doing it out of revenge or anger, or do you genuinely believe she has a right to know the truth?
Timing: Consider the timing of when you found out about the affair and when they got involved. Sometimes, if it has been a while since the affair ended, revealing this information might not be helpful.
Anonymity: If you choose to tell her, you could do it anonymously. This approach allows her to be informed without the added complexity of you being directly involved.
Closure: Reflect on whether telling her will bring you closure or just open old wounds. Sometimes, it may be best to focus on your own healing and moving forward.
Support: Reach out to friends, family, or a therapist to talk about your feelings and get support before making a decision.
Ultimately, the decision is yours to make. It may be helpful to take some time to process your emotions and consider the potential outcomes before taking any action. Remember that healing from a betrayal can take time, and it's essential to prioritize your well-being during this process.