An intimate partner will threaten that sacred agreement if he or she chooses to create an important but separate relationship with another person without the other partner’s knowledge. Some intimate ...

When a third person joins a pair, the flow of communication, influence, and closeness between the original pair will typically change. People often feel invaded, forgotten, angry, hurt, and resentful ...

An unstable relationship is like a two-legged table. It can’t stand on its own, but a three-legged table is more stable. So, when a relationship is unstable, the couple often uses another person to ...