If You Join, It's Not Betrayal

Imagine her worst nightmare: her boyfriend having sex with another woman. Now imagine how she feels when she realizes that this woman is the eldest in her family. Heck, her world has been turned upside down! But reason had always come first for her. She thought: if her goal in life was the happiness of her beloved, why should she suffer when he was happy? No, that's not good enough! After rethinking her value system, she made the only decision that was important in such a situation.