Dreams involving romantic relationships, especially with significant age differences and wealth, can symbolize various aspects of your life and emotions. Here are a few interpretations of your dream:

1. Desire for Security: The wealthy elderly man may represent a desire for financial stability or security in your life. This could reflect your aspirations or feelings about your current situation regarding finances and relationships.
2. Exploration of Relationships: The romantic aspect of the dream might indicate your exploration of different types of relationships or your feelings towards older partners. It could signify a longing for maturity and wisdom in a partner.
3. Moral Dilemma: The revelation of the man's marriage introduces a conflict, suggesting you might be grappling with issues of loyalty, trust, or ethical considerations in your waking life. This could reflect fears of being involved in a complicated or morally ambiguous situation.
4. Self-Discovery: Turning away from the call signifies a moment of self-awareness or realization. It suggests a decision to prioritize your own values and self-respect, choosing to walk away from a potentially harmful situation.
5. Unconscious Warnings: This dream may serve as a warning from your subconscious about the importance of being aware of the hidden aspects of people in your life and the consequences of getting involved with someone who is not fully available.

Consider reflecting on your current relationships and feelings about security and ethics. This dream might be encouraging you to assess what you truly want and need in your romantic life.