South Korea has an imbalance husband and wife (men and women) relationship. It’s odd that the wife is okay to have her single friend to go on a family trip and also take care of her chords and child care. In a way the nice friend is also taking advantage of the evil friend. They only know each other for two years since the reunion, why would she let someone so involved in her home life when she’s already a housewife? I also dated someone who would go on their ex’s family trip. At that time I realized there’s something very bizarre and weird about that relationship. No one is that friendly with their ex when they are still single.