Saturn in 4th House synastry forms relationships based upon joint seriousness and engagement in family and household activities. Partners’ behavior is marked by high discipline and mutual responsibility. The “Saturnine” personality inspires the personality of the Fourth House which, in turn, always provides areas to work in.
If the aspect is negative, the professional activities of the “Saturnine” personality may conflict with the daily needs of the person of the Fourth House. This latter may regard the “Saturnine” personality as insensitive and unresponsive to feelings or emotions and may feel as if they are burdensome in many ways.
Saturn in 4th House synastry is positive, there is often no significant disagreements between partners in the family-household spheres of active life.
from F. Sakoyan, L. Ecker
Saturn in 4th House Synastry Explained
Your Saturn in 4th House synastry partner was sent to you so you can better understand the basic principles of life, the nature of your religiosity, and the foundation of your existence. However, Saturn in Fourth House synastry is not an easy aspect, and it is unlikely that your relationship will be a smooth one.
On the journey to trust and love, your partner will face great difficulties, in an unobvious order, and it may be difficult to explain why you freeze in their company, especially in the moments when the situation invites you to relax. In these cases, your Saturn in 4th House synastry partner will be serious and may attempt to talk to you about the fundamental issues of your life; but in this case, the intention is not serious enough.
Your partner needs a good understanding of your internal and external circumstances, otherwise they will project their emotions onto you, and the slightest inaccuracy will be perceived as rude or tactless. More often than not, you will avoid such interactions, knowing from experience that when a partner becomes gloomy and serious, it is better to consider him or her as a piece of home furniture, which is dilapidated and needs to be replaced. Fortunately, this will happen on its own in a little while, as long as you don’t do anything to exacerbate it.
from A. Podvodny