Dreams about family dynamics, especially involving ex-partners and current relationships, can often reflect underlying emotions or concerns you may have about your current situation.

In your dream, your ex-wife leaving your son with you and your current wife might symbolize feelings of responsibility and the blending of family roles. It could indicate that you are navigating the complexities of co-parenting or are reflecting on your past relationship while trying to build a future with your current spouse.

Consider the following insights:

1. Feelings of Responsibility: This dream could highlight your feelings of responsibility towards your son and the current family structure. It might reflect your commitment to ensuring a stable environment for him.
2. Integration of Relationships: The presence of both your ex-wife and current wife in the dream may suggest that you are trying to integrate different aspects of your life. You might be working on how to balance past relationships with your present one.
3. Concerns About Absence or Abandonment: The act of your ex-wife planning a trip could symbolize feelings of absence or a fear of being left to handle things alone. It might reflect anxieties about whether you and your current wife can adequately support your son.

Reflect on your current feelings towards your family dynamics and consider if there are areas where you might need to address any unresolved emotions or communicate more openly with your current wife regarding your son’s well-being.