People struggle in the modern world to spend precious minutes with each other. It is nearly unimaginable for some people to believe anyone would have a partner with enough time or energy to control their every move, but it does happen. Isolating a partner within a relationship is a way to control their thoughts and feelings. It is generally initiated accidentally, and a good partner will help alleviate the loneliness. A partner that finds they enjoy control tends to work harder at keeping their partner isolated.
When someone is in an isolating relationship, friends and family do not always know how to help them. This is a difficult situation because the controlling partner will claim these people are only trying to ruin their relationship. The isolated person does not know who to trust, and they generally turn to their partner for support. This type of relationship often breaks up once the controlling partner gets bored with their dominance games or finds a new partner to control.