Interdependency

In inter-dependent relationships, very often, one person would be fighting on and working hard for the other without the other realising it. For example, a person would be gravely ill and another would be working hard to look after the ill person. However, what really motivated this person to come forward to look after the ill person could be because the person self is gravely ill and would not want the other to know. This very motivation would be what is aiding this person in fighting the self illness and giving the person the energy to look after the supposedly sick person. Therefore, to say that two people's relationship would flourish or flounder, as of this moment in your life. is not it to presumtive a decision?