Emotions have been pointed out as central for family capital and success of family businesses, but research about how family members manage emotions is lacking. This paper focuses on family members' display of emotions and their emotion boundary management. An analysis of the narratives of five family members illustrate that individuals have diverse views on emotions boundary management. Based on the emotions literature and boundary management, this reveals that time, space and genuine relationships are clues to the individual in how he or she manages emotions between work and family in a situation where both spheres are intertwined. It reveals that family members' creation and maintenance of emotion boundaries are related to their individual emotional harmony and/or dissonance where emotional dissonance may be displayed in order to respect the "family" emotion rule at the sacrifice of one’s own honest emotion. Emotion rules and emotion boundaries are thus developed and enacted differently and individually by each family business member in a three dimensional way – through time, space and genuine relations. This paper finally suggests that family members’ individual emotional harmony and/or dissonance in the long run leads to family emotion harmony and/or disharmony.