Which factor does NOT relate positively to marital happiness?

The factor that does not relate positively to marital happiness is late independence from mother's oversight. This suggests that individuals who remain overly dependent on their mothers may struggle to establish a healthy, autonomous partnership with their spouse. Late independence can lead to issues such as emotional dependency, difficulty in making independent decisions, or struggles with conflict resolution in the marriage.

In contrast, a desire for children, premarital tendencies to be expressive, and a positive self-image are generally associated with increased marital happiness. A desire for children can strengthen the bond between partners as it often involves shared goals and commitment to family. Premarital expressiveness can foster open communication and emotional connection, which are key components of a happy marriage. Similarly, a positive self-image contributes to a person's confidence and overall happiness, allowing them to engage positively within a relationship.

Thus, while the other factors enhance marital happiness, late independence may hinder a couple's ability to thrive together in a healthy and balanced way.