Moon in 4th House synastry governs close relationships based on domestic and family activities. Individuals are either members of the same family, or they live together under the same roof.
Both partners honor parental instructions they received in early childhood, and it is on their basis that they build a psycho-emotional relationship. Throughout this process, they will continuously educate each other in the matters related to their house, providing all sorts of support (including financial). They will also be involved in activities that can enhance the status and well-being of their home and family.
The 4th House partner’s abilities to maintain the house in top shape will stimulate the emotional reactions of the “lunar” personality, which will skillfully guide and direct the personality of the Fourth House in the right direction.
from F. Sakoyan, L. Ecker
Moon in 4th House Synastry Explained
The Moon in 4th House synastry is a very delicate aspect which can give partners either deep satisfaction and peace, or inflict severe spiritual wounds.
The mind plays a negligible part in this relationship as interactions tend to be intuitive. If the relationship is positive, you will be very pleased when your partner visits your house. You’ll surround them with care, comfort and warmth while they relax feeling safe and at ease, talking about family or life in general without touching any specific problems that are unpleasant for you.
At a high level, the Moon in 4th House synastry gives you the opportunity to create a feeling of self-confidence in both your partner and your life. The partner, with their selfless care and love, can disabuse you even from the most nihilistic positions and pessimistic views of the world and evolution as a whole.
The Moon in Fourth House Synastry Between a Man and a Woman
If the female Moon falls into the Fourth House of a man, she may feel a strong desire to either stay in his house forever after the very first, or leave within a minute if no connection is formed. This, however, is only the first impression. If she does settle in there, it’ll turn on her own 4th House which may form most unpredictable aspects with the Fourth House of the man himself.
If, on the contrary, the male Moon enters the IV House of a woman, he may really like to visit her and complain about his own wife, receiving moral support in the form of nonspecific or specific signs of female attention. And it may not even occur to him that his visits play a very important role in a woman’s life that can be positive, or cause her deep suffering, or both as she may be poorly aware of her feelings even when the Moon in 4th House synastry sharpens them.
from A. Podvodny